KINDAI UNIVERSITY


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HATSUKADE Yoshimi

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FacultyDepartment of Electronic Engineering and Computer Science / Graduate School of System Enginnering / Research Institute of Fundamental Technology for Next Generation
PositionProfessor
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/1252-hatsukade-yoshimi.html
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Last Updated :2020/09/02

Education and Career

Education

  •   1994 04  - 1998 03 , Waseda University, School of Science and Engineering
  •   1998 04  - 2000 03 , Waseda University, Graduate School of Science and Engineering
  •   2000 04  - 2003 03 , Waseda University, Graduate School of Science and Engineering

Academic & Professional Experience

  •   2014 04 ,  - 現在, Faculty of Engineering, Department of Electronic Engineering and Computer Science, Kindai University
  •   2011 04 ,  - 2014 03 , Toyohashi University of Technology
  •   2010 04 ,  - 2011 03 , Toyohashi University of Technology
  •   2007 04 ,  - 2010 03 , Toyohashi University of Technology
  •   2005 04 ,  - 2007 03 , Toyohashi University of Technology
  •   2003 04 ,  - 2005 03 , Toyohashi University of Technology
  •   2001 04 ,  - 2003 03 , School of Science and Engineering, Waseda University

Research Activities

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Measurement engineering

Research Interests

  • SQUID, Bioinformatics, Application of AI and IoT, nondestructive evaluation, magnetic field measurement

Published Papers

  • All-round Inspection of a Pipe based on Ultrasonic Guided Wave Testing utilizing Magnetostrictive Method and HTS-SQUID Gradiometer, Y. HATSUKADE, N. Masutani, Y. Azuma, K. Sato, T. Yoshida, S. Adachi, K. Tanabe, IEEE Trans. Appl. Supercond., IEEE Trans. Appl. Supercond., 29(5), 1601505, Mar. 2019 , Refereed
  • Defect Detection of Pipes using Guided Wave and HTS-SQUID, Y. HATSUKADE, N. Masutani, S. Teranishi, K. Masamoto, S. Kanenaga, S. Adachi, K. Tanabe, IOP Conf. Series: Journal of Pysics: Conf. Series, IOP Conf. Series: Journal of Pysics: Conf. Series, 871, 012074, Jul. 2017 , Refereed
  • HTS-SQUID NDE Technique for Pipes based on Ultrasonic Guided Wave, N. Masutani, S. Teranishi, K. Masamoto, S. Kanenaga, Y. HATSUKADE, S. Adachi, K. Tanabe, IOP Conf. Series: Journal of Pysics: Conf. Series, IOP Conf. Series: Journal of Pysics: Conf. Series, 871, 012072, Jul. 2017 , Refereed
  • Mobile HTS-SQUID Magnetometer in a Unshielded Environment, Yoshimi Hatsukade, Keisuke Yoshida, Takahiro Kage, Takafumi Suzuki, Saburo Tanaka, J. Cryo. Super. Soc. Japan, J. Cryo. Super. Soc. Japan, 49(8), 439 - 445, 2014 , Refereed
  • Nondestructive evaluation of ±45° flat-braided carbon-fiber-reinforced polymers with carbon nanofibers using HTS-SQUID, Y. Hatsukade, Y. Shinyama, K. Yoshida, Y. Takai, M.S. Aly-Hassan, A. Nakai, H. Hamada, S. Adachi, K. Tanabe, S. Tanaka, Physica C, Physica C, 2012 , Refereed
  • High-Tc SQUID Application for Roll to Roll Metallic Contaminant Detector, S. Tanaka, Y.Kitamura, Y.Uchida, Y. Hatsukade, T. Ohtani, S. Suzuki, Progress in Superconductivity, Progress in Superconductivity, 14(2), 82 - 86, 2012 , Refereed
  • Evaluation of Damage Mechanism of ±45°Flat Braided CFRP Composites under Tensile Loading with Assistance of SQUID Technique, M. S. Aly-Hassan, Y. Takai, A. Nakai, H. Hamada, Y. Shinyama, Y. Hatsukade, S. Tanaka, accepted in Composites Part A, Elsevier., accepted in Composites Part A, Elsevier., 2011 , Refereed
  • Metallic Contaminant Detection using HTS SQUID Gradiometer, Saburo Tanaka, Tomohiro Akai, Makoto Takemoto, Yoshimi Hatsukade, Takeyoshi Ohtani, Yoshio Ikeda, Shuichi Suzuki, Chinese Physics Letters, Chinese Physics Letters, 27(8), 088503-1 - 088503-3, 2010 , Refereed
  • Study of Magnetic Metallic Contaminant Detector using HTS-SQUID Gradiometer, Tomonori Akai, Makoto Takemoto, Yoshimi Hatsukade, Saburo Tanaka, Extended Abstract of ISEC2009, Extended Abstract of ISEC2009, SQ-P11, 64 - 65, 2009 , Refereed
  • Detection of Wire Breakage in Compressive Conductor Joint using HTS-SQUID Gradiometer, Yoshimi Hatsukade, Atsushi Miyazaki, Hideki Matsuura, Tatsumi Maeda, Akio Suzuki, Saburo Tanaka, Extended Abstract of ISEC2009, Extended Abstract of ISEC2009, SQ-P09, 60 - 61, 2009 , Refereed
  • Study of Robustness of HTS-SQUID Magnetometer Covered by Superconducting Shield in AC Magnetic Field, Yoshimi Hatsukade, Sho Kanai, Masahiro Hayashi, Keita Hayashi, Saburo Tanaka, Extended Abstract of ISEC2009, Extended Abstract of ISEC2009, SQ-P26, 368 - 369, 2009 , Refereed
  • Robot-arm-based Mobile Nondestruvtive Inspection System using a Cryocooler-based HTS-SQUID Gradiometer, Yoshimi Hatsukade, Kohe Yotsugi, Keita Hayashi, Saburo Tanaka, Journal of Cryo. Soc. Japan, Journal of Cryo. Soc. Japan, 44, 54 - 60, 2009 , Refereed
  • Inspection of Wire Breakage in Aluminum Transmission Lines using an HTS SQUID, Yoshimi Hatsukade, Atsushi Miyazaki, Hideaki Matsuura, Tatsumi Maeda, Yasushi Fuke, Saburo Tanaka, Journal of Cryo. Soc. Japan, Journal of Cryo. Soc. Japan, 44, 61 - 67, 2009 , Refereed
  • Development of Multi-channel high-Tc SQUID System for Bio-magnetic Measurements of Small Subjects, Y. Hatsukade, K. Noda, S. Masaki, S. Yoshida, Y. Torii, A. Karitani, S. Tanaka, Biomagnetism Interdisciplinary Research and Exploration, Eds. R. Kakigi, K. Yokosawa, S. Kuriki, Hokkaido University Press, Biomagnetism Interdisciplinary Research and Exploration, Eds. R. Kakigi, K. Yokosawa, S. Kuriki, Hokkaido University Press, 27 - 29, 2008 , Refereed
  • Metallic Foreign Matter Detection Technology using High-Tc SQUID Sensor, Saburo Tanaka, Yoshimi Hatsukade, Proceeding of 2008 Japan-Korea Joint Workshop on Advanced Semiconductor Processes and Equipments, Proceeding of 2008 Japan-Korea Joint Workshop on Advanced Semiconductor Processes and Equipments, 260 - 264, 2008 , Refereed
  • Study of a Leakage Magnetic FIeld due to an Opening in a Multi-layer type Magnetically Shielded Room using Finite Element Method, H. Fujita, Y. Hatsukade, K. Yamazaki, S. Tanala, Journal of the Magnetics Society of Japan, Journal of the Magnetics Society of Japan, 31(5), 416 - 420, 2007 , Refereed
  • Analysis of High-Tc Superconducting Films Using a Free Electron Laser, K.Nishi, Y.Hatsukade, S.Tanaka, K.Awazu, H.Horiike, Trans. of Materials Research Society of Japan, Trans. of Materials Research Society of Japan, 32, 235 - 237, 2007 , Refereed
  • High Tc SQUID based Magnetic Contaminant Detection System For Beverage or Minced Flesh, S. Tanaka, H. Fujita, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, S. Suzuki, T. Otani, IEEE Transactions on Applied Superconductivity, IEEE Transactions on Applied Superconductivity, 17, 756 - 759, 2007 , Refereed
  • A High-Tc SQUID Micro-detector using high performance magnetic shield for industrial products, SaburoTanaka, H. Fujita, Y. Hatsukade, T. Otani, S. Suzuki, T. Nagaishi, Supercond. Sci. Technol, Supercond. Sci. Technol, 20(11), S385 - S388, 2007 , Refereed
  • Inspection of Thin Copper Heat Exchange Tubes Using SQUID-NDE System, Yoshimi Hatsukade, ShinyaOkuno, Kazuaki Mori, Saburo Tanaka, Key Engineering Materialas, Key Engineering Materialas, 321-323, 1425 - 1430, 2006 , Refereed
  • Detection of Metal Contaminants in Food using High Tc SQUIDs Magnetometer, Saburo Tanaka, Hiroyoshi Fujita, Yoshimi Hatsukade, Tatsuoki Nagaishi, Kazuaki Nishi, Hajime Ota, Takeyoshi Otani, Shuichi Suzuki, Key Engineering Materials, Key Engineering Materials, 321-323, 1163 - 1167, 2006 , Refereed
  • Low-noise Cryocooler-cooled Compact SQUID-NDE System for Carbon-Fiber Composites, Y. Hatsukade, N. Kasai, H. Takashima, A. Sakamaki, Y. Maruno, S. Tanaka, A. Ishiyama, Proceedings of the 6th European Conference of Applied Superconductivity 2003, Proceedings of the 6th European Conference of Applied Superconductivity 2003, 181, 3231 - 3238, 2005 , Refereed
  • Detection System for DNA by High Tc SQUID, Saburo Tanaka, Zarina Aspanut, Hirofumi Kurita, Chika Toriyabe, Yoshimi Hatsukade, Shinji Katsura, Proceedings of The 2005 Japan-Taiwan Symposium on Superconductive Electronics, Proceedings of The 2005 Japan-Taiwan Symposium on Superconductive Electronics, 89 - 92, 2005 , Refereed
  • Inspection of Copper Heat Exchanger Tubes Using HTS-SQUID, Yoshimi Hatsukade, Akifumi Kosugi, Saburo Tanaka, “Inspection of Copper, Heat Exchanger Tubes, Using HTS-SQUID, Proceedings of The 2005 Japan-Taiwan Symposium on Superconductive Electronics, Proceedings of The 2005 Japan-Taiwan Symposium on Superconductive Electronics, 93 - 96, 2005 , Refereed
  • High Tc SQUIDs Based Food Contaminants Detection System for Sale, S.Tanaka, H. Fujita, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, T. Otani, S. Suzuki, Extended Abstracts of 10th International Superconductive International Conference 2005 (ISEC2005), Extended Abstracts of 10th International Superconductive International Conference 2005 (ISEC2005), pO-O. 04, 1 - 2, 2005 , Refereed
  • Pulse tube cryocooler SQUID cooling system involving an infrared temperature controller cooled by a cryocooler, S. Tanaka, S. Iwao, Y. Hatsukade, Physica C, Physica C, 426-631, 1585 - 1590, 2005 , Refereed
  • Detection of Contaminants in Food and Drug by Sensitive SQUID Magnetometer, S.Tanaka, S.Kudo, S.Tsuboi, N.Hotta, Y.Hatsukade, T.Nagaishi, K. Nishi, H. Ota, S. Suzuki, Proceedings of International Conference on Electrical Engineering 2004(ICEE 2004), Proceedings of International Conference on Electrical Engineering 2004(ICEE 2004), 127 - 131, 2004 , Refereed
  • Eddy Current Based SQUID-NDI System for Thin Copper Tubes, Y. Hatsukade, A. Kosugi, K. Mori, S. Tanaka, Jpn. J. Appl. Phys., Jpn. J. Appl. Phys., 43, L1488 - L1491, 2004 , Refereed
  • Measurement of a metallic inclusion in food by high-Tc SQUID, Saburo Tanaka, Miyuki Natsume, Masashi Uchida, Naoki Hotta, Takemasa Matsuda, Zarina Aspanut, Yoshimi Hatsukade, Extended Abstracts of 9th Int. Superconductive Electronics Conference(ISEC 2003), Extended Abstracts of 9th Int. Superconductive Electronics Conference(ISEC 2003), PTh47, 1 - 2, 2003 , Refereed
  • Multipoint measurement of T (0, 1) Mode Guided Wave Using HTS-SQUID Gradiometer, Natsuki Masutani, Shota Teranishi, Ken Masamoto, Shoya Kanenega, Yuki Azuma, Yoshimi Hatsukade, Seiji Adachi, Keiichi Tanabe, IEEE Transactions on Applied Superconductivity, IEEE Transactions on Applied Superconductivity, 28(4), 1 - 5, Jun. 01 2018 , Refereed
    Summary:In this paper, multipoint measurements of ultrasonic guided waves on an aluminum sample pipe were performed using a high-temperature superconductor superconducting quantum interference device (HTS-SQUID) gradiometer. Two magnetized thin nickel plates were glued on the pipe with circumferential defects. One of them was used as a magnetostrictive transmitter by winding a coil around it to generate T (0, 1) mode guided waves. The HTS-SQUID gradiometer was set to measure $dB-{x}/dz$ above the other nickel plate with a lift-off distance of about 3 mm. The multipoint magnetic flux measurements of the guided waves generated on the pipe without and with the defects were conducted while changing position of the HTS-SQUID gradiometer around the pipe. Contour maps of the magnetic signals were made on the plane of time and angle of the SQUID. The magnetic signals due to the defects were successfully measured in the contour maps. Intensity of the magnetic signal due to the defect increased in proportion to width of the defect. The intensities of the magnetic signals slightly varied depending on the angle of the SQUID. We discussed this phenomenon and concluded that magnetization inside the nickel plate of the receiver was no uniform.
  • Novel Remote NDE Technique for Pipes Combining HTS-SQUID and Ultrasonic Guided Wave, Yoshimi Hatsukade, Tomoki Kobayashi, Saki Nakaie, Natsuki Masutani, Yoshikazu Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 27(4), 1600104, Jun. 2017 , Refereed
    Summary:This paper describes basic research of a novel remote nondestructive evaluation (NDE) technique for pipes combining high-sensitive high-temperature superconductor superconducting quantum interference device (HTS-SQUID) and ultrasonic guided waves. Measurements of magnetic signals due to acoustic emission (AE) and ultrasonic-guided waves on a steel pipe were demonstrated using an HTS-SQUID gradiometer. To convert the guided waves into magnetic signals, the inverse magnetostrictive effect of a magnetized nickel thin plate glued around the pipe's circumference was utilized. An AE sensor and alternative magnetized nickel thin plate with wound coil were used as AE and ultrasonic-guided wave transmitters. Magnetic signals due to AE and ultrasonic guided waves were successfully measured by the HTS-SQUID gradiometer, which was set above the nickel film with a lift-off of about 2 mm.
  • Mobile NDE System Utilizing Robust HTS-SQUID Magnetometer for Use in Unshielded Environments, Yoshimi Hatsukade, Saburo Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 26(3), 1600204, Apr. 2016 , Refereed
    Summary:In this paper, we demonstrated detection of deeplying defects in aluminum alloy samples utilizing an eddy current technique while moving a robust HTS-SQUID magnetometer integrated on a robot-based NDE system in an unshielded environment. A bicrystal-Josephson-junction-based HTS-SQUID magnetometer, which was covered by an alternative HTS film as a superconducting shield, both having amesh structure with a 5-mu m line width, was used in the system. An active magnetic shield scheme was also utilized in order to cancel magnetic flux coupling to the magnetometer during motion. For comparison, detection of the same defects using a ramp-edge-Josephson-junction-based HTS-SQUID gradiometer, which has the roughly equivalent area with the magnetometer, was also carried out. Experimental results showed that the magnetometer had better capability to detect deeper defects in conductive materials than the gradiometer.
  • Robot-Based NDE System Using Movable HTS-SQUID Magnetometer Covered With HTS Film for Use in Unshielded Environment, Y. Hatsukade, K. Yoshida, T. Kage, T. Suzuki, S. Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 25(3), 1601105, Jun. 2015 , Refereed
    Summary:We developed a robust HTS-SQUID magnetometer utilizing bicrystal SrTiO3 substrates, single-layer YBa2Cu3O7-x films and flip-chip technique, aiming for movable robot-based NDE system in unshielded environment. Robustness in the unshielded environment was achieved by coverage of the SQUID magnetometer with another cross-shaped HTS film in flip-chip configuration, and introduction of mesh structure in both the magnetometer and the HTS film. SQUID parameters, such as critical current 2I(c), resistance R-n/2, modulation voltage depth V-PP, and flux noise S-Phi(1/2) F, were measured in DC and AC fields. The SQUID magnetometer was rotated in unshielded environment, and moved by a robot arm, resulting in stable operation during the motion at 20 mm/s with active magnetic shielding technique.
  • Contaminant Detection System using High Tc SQUID for Inspection of Lithium Ion Battery Cathode Sheet, Saburo Tanaka, Takeyoshi Ohtani, Yosuke Uchida, Yoshimi Hatsukade, Shuichi Suzuki, IEICE TRANSACTIONS ON ELECTRONICS, IEICE TRANSACTIONS ON ELECTRONICS, E98C(3), 174 - 177, Mar. 2015 , Refereed
    Summary:We report the fabrication of magnetic metallic contaminant detectors using multiple high-Tc SQUIDs (superconducting quantum interference devices) for a lithium-ion battery cathode sheet. Finding ultrasmall metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Hence, a detection method of small contaminants is required. Preventing such accidents is also an important issue for manufacturers of industrial products. Given the lower detection limit for practical X-ray usage is in the order of 1 mm, a detection system using a SQUID is a more powerful tool for sensitive inspections. We design and set up an eight-channel roll-to-roll high-Tc dc-SQUID inspection system for a lithium ion battery cathode sheet. We report the evaluation results that the detection of a small phi 18 -mu m steel particle on a lithium-ion battery cathode sheet was successfully done.
  • Imaging of Magnetic Nanoparticles Using a Second Harmonic of Magnetization With DC Bias Field, Saburo Tanaka, Hayaki Murata, Tomoya Oishi, Yoshimi Hatsukade, Yi Zhang, Herng-Er Horng, Shu-Hsien Liao, Hong-Chang Yang, IEEE TRANSACTIONS ON MAGNETICS, IEEE TRANSACTIONS ON MAGNETICS, 51(2), 6502504, Feb. 2015 , Refereed
    Summary:We have developed a method to improve the detection sensitivity for the magnetization M of magnetic nanoparticles (MNPs) using a high Tc superconducting quantum interference device magnetometer. The M response of MNP to an applied magnetic field H(M-H characteristics) can be divided into a linear region and a saturation region, which are separated at a transition point H-k. When applying an excitation ac magnetic field (Hac) and an additional dc bias field H-dc = H-k, the second harmonic of M reaches a maximum due to the nonlinearity of its M-H characteristics. This harmonic is stronger than any other harmonics, including a third harmonic. The advantage of using the second harmonic response is that the response can be measured even in a small field Hac. The M response of MNP was systematically analyzed and experimentally demonstrated. For conventional detection using a third harmonic, the amplitude of the Hac must be larger than the threshold level, which is almost the same as H-k. Detection methods using a second harmonic can be applied to magnetic particle imaging. We finally demonstrate the construction of a 1-D image of two separated bottle-shaped MNP samples using the method with a lock-in amplifier.
  • Ultra-Sensitive Contaminant Detection System Using High-Tc SQUID, S. Tanaka, T. Ohtani, Y. Uchida, Y. Hatsukade, S. Suzuki, JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 28(2), 667 - 670, Feb. 2015 , Refereed
    Summary:We report the fabrication of magnetic metallic contaminant detectors using multiple high-Tc superconducting quantum interference devices (SQUIDs) for food. Finding small metallic contaminants is important for food safety. People may ingest contaminants that are accidentally mixed in with the food. Hence, a detection method of small contaminants in food is required. Given the lower detection limit for practical X-ray usage is in the order of 1 mm, a detection system using a SQUID is a more powerful tool for sensitive inspections. We design and set up a three-channel high-Tc rf-SQUID inspection system for food. We report the successful detection of a small phi 0.3-mm steel particle for the food detection system.
  • Metallic Contaminant Detection System using Multi-Channel Superconducting Quantum Interference Device (SQUID), Saburo Tanaka, Takeyoshi Ohtani, Yosuke Uchida, Takumi Chigasaki, Yoshimi Hatsukade, TRENDS IN MAGNETISM: NANOMAGNETISM, TRENDS IN MAGNETISM: NANOMAGNETISM, 215, 465 - 469, 2014 , Refereed
    Summary:Metallic particles with outer dimensions smaller than 100 microns in Li-ion battery cannot be detected using a conventional X-ray imaging system. We propose two systems using high Tc SQUIDs: One is a direct detection type and the other is an indirect type. In the direct detection system, an object with a contaminant is magnetized by a permanent magnet and then the remanent field of the contaminant is detected by SQUID. In the indirect detection system, the principle is based on Faraday's law of electromagnetic induction. The diameter of the detection coil is 2 to 3 times larger than the SQUID; as a result, less number of SQUIDs, two or three is enough to inspect a specimen with a width of 65 mm. This method is applicable for an inspection of metallic contaminants in non-magnetic film such as a separator for Li-ion battery. We discuss the results of the evaluation of the new system as compared with a direct detection system.
  • Study of Cu-wound Flux transformer for High-Tc SQUID Ultra-Low Field MRI, S. Tanaka, H. Murata, K. Imamura, Y. Hatsukade, 11TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS2013), PTS 1-4, 11TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS2013), PTS 1-4, 507, 042042 - 042042, 2014 , Refereed
    Summary:We constructed a ultra-low field (ULF) nuclear magnetic resonance (NMR) / magnetic resonance imaging (MRI) system employing a high-temperature superconductor (High Tc) SQUID with a separated Cu-wound flux transformer. The pickup coil consisted of two single solenoid coils and each coil was differentially connected each other. The flux transformer consisted of a pickup coil at room temperature and an input coil, which was put in liquid nitrogen and was magnetically coupled with a high-Tc SQUID. The ratio of the transformer was considered and optimized. A water phantom of 10 mL was located in the one side of pickup coil. In the system, we applied polarizing field B-p perpendicular to the measurement field B-m before measurements. B-p was 0.8 T and permanent magnet was used. By using this system, free induction decay (FID) signals of H-1 were measured at B-m of 30 mu T to evaluate the system. The longitudinal relaxation times T-1 of water were also estimated by changing the polarizing time of B-p.
  • Development of contaminant detection system based on ultra-low field SQUID-NMR/MRI, S. Tsunaki, M. Yamamoto, J. Hatta, Y. Hatsukade, S. Tanaka, 11TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS2013), PTS 1-4, 11TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS2013), PTS 1-4, 507, 042044, 2014 , Refereed
    Summary:We have developed an ultra-low field (ULF) NMR/MRI system using an HTS-rf-SQUID and evaluated performance of the system as a contaminant detection system for foods and drinks. In this work, we measured 1D MRIs from water samples with or without various contaminants, such as aluminum and glass balls using the system. In the 1D MRIs, changes of the MRI spectra were detected, corresponding to positions of the contaminants. We measured 2D MRIs from food samples with and without a hole. In the 2D MRIs, the hole position in the sample was well visualized. These results show that the feasibility of the system to detect and localize contaminants in foods and drinks.
  • Feasibility study of contaminant detection for food with ULF-NMR/MRI system using HTS-SQUID, Yoshimi Hatsukade, Shingo Tsunaki, Masaaki Yamamoto, Takayuki Abe, Junichi Hatta, Saburo Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 494, 199 - 202, Nov. 2013 , Refereed
    Summary:We have developed an ultra-low frequency (ULF) nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) system utilizing an HTS-SQUID for an application of contaminant detection in food and drink. In the system, a permanent magnet of 1.1 T was used to pre-polarize protons in a water sample. We measured NMR signals from water samples with or without various contaminants, such as stainless steel (SUS304), aluminum, and glass balls using the system. In the case that the contaminant was the SUS304 ball, the NMR signal intensity was reduced compared to that from the sample without the contaminant due to the remnant field of the contaminant. One-dimensional (1D) MRIs of the samples were also acquired to detect non-magnetic contaminants. In the 1D MRIs, changes of the MRI spectra were detected, corresponding to positions of the contaminants. These results show that the feasibility of the system to detect various contaminants in foods. (C) 2013 Elsevier B. V. All rights reserved.
  • Superparamagnetic nanoparticle detection using second harmonic of magnetization response, Yi Zhang, Hayaki Murata, Yoshimi Hatsukade, Saburo Tanaka, REVIEW OF SCIENTIFIC INSTRUMENTS, REVIEW OF SCIENTIFIC INSTRUMENTS, 84(9), 094702-1 - 094702-4, Sep. 2013 , Refereed
    Summary:We introduce a method to improve the detection sensitivity for the magnetization M of superparamagnetic nanoparticles (MNP). The M response of MNP to an applied magnetic field H (M-H characteristics) could be divided into a linear region and a saturation region, which are separated at a transition point H-k. When applying an excitation magnetic field (H-ac) with a frequency omega(0) and an additional dc bias field H-dc = H-k, the second harmonic of M reaches the maximum due to the nonlinearity of the M-H characteristics. It is stronger than any other harmonics and responsible for small H-ac without a threshold. The second harmonic selected as the readout criterion for M response of MNP is systematically analyzed and experimentally proven. (C) 2013 AIP Publishing LLC.
  • Development of Metallic Contaminant Detection System Using Eight-Channel High-T-c SQUIDs, S. Tanaka, Y. Kitamura, Y. Uchida, Y. Hatsukade, T. Ohtani, S. Suzuki, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 23(3), 1600404 - 1600404, Jun. 2013 , Refereed
    Summary:In this paper, a roll-to-roll eight-channel (8-ch) high-T-c superconducting quantum interference device (SQUID) detection system for magnetic contaminants in a lithium-ion (Li-ion) battery anode sheet was developed. Finding ultra-small metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Metallic particles with outer dimensions smaller than 100 mu m cannot be detected using a conventional X-ray imaging system. Therefore, a highly sensitive detection system for small foreign matter is required. We have already developed a detection system based on a single-channel SQUID gradiometer and horizontal magnetization. For practical use, the detection width of the system should be increased to at least 65 mm by employing multiple sensors. In this paper, we present an 8-ch high-T-c SQUID roll-to-roll system for inspecting a Li-ion battery anode with a width of 65 mm. A special microscopic type of a cryostat was developed upon which eight SQUID gradiometers were mounted. As a result, small iron particles of phi 35 mu m on a real Li-ion battery anode with a width of 70 mm were successfully detected. This system is practical for the detection of contaminants in a Li-ion battery anode sheet.
  • Application of Ultra-Low Field HTS-SQUID NMR/MRI to Contaminant Detection in Food, Y. Hatsukade, T. Abe, S. Tsunaki, M. Yamamoto, H. Murata, S. Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 23(3), 1602204 - 1602204, Jun. 2013 , Refereed
    Summary:We constructed an ultra-low field nuclear magnetic resonance (NMR)/magnetic resonance imaging (MRI) system utilizing a high-temperature superconductor (HTS) SQUID and permanent magnet for application of contaminant detection in food and drink. In order to compensate shortage of signal-to-noise ratio of the HTS-SQUID-based system, a pair permanent magnet of 1.1 T was employed for prepolarization field. It was combined with a sample transfer apparatus, which transferred a water sample with contaminant in a 10-ml glass bottle from the magnet to under the SQUID magnetometer within 0.5 s. Feasibility of contaminant detection in drink was demonstrated using the system by measuring NMR and 1-D MRI of water samples including contaminants of stainless steel, aluminum, and polymer. 2-D MRI measurement of a sample with partitioned water by silicone bulk was demonstrated employing the filtered back projection reconstruction method.
  • Development of High-Tc SQUID and application to ultra-sensitive contaminant detection system, S. Tanaka, Y. Uchida, Y. Kitamura, Y. Hatsukade, T. Ohtani, S. Suzuki, Journal of Superconductivity and Novel Magnetism, Journal of Superconductivity and Novel Magnetism, 26(4), 845 - 849, Apr. 2013 , Refereed
    Summary:We have developed magnetic metallic contaminant detectors using multiple high-Tc SQUIDs (superconducting quantum interference devices) for food and industrial products. For manufacturers producing items such as processed food and industrial products, problems with metallic contaminants are critical issues. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. The lower detection limit for practical X-ray usage is on the order of 1 mm. A detection system using a SQUID is a powerful tool for sensitive inspections. For practical use, the detection width of the system should be increased by employing multiple sensors. We designed and set up a multi-channel high-Tc SQUID inspection system with a width of at least 130 mm for food and 70 mm for industrial products. As a result, a small 0.3-mm stainless steel particle for food and a 27-μm iron particle for industrial products were successfully detected. © 2012 Springer Science+Business Media New York.
  • ULF-NMR system using HTS-SQUID and permanent magnet, Shohei Fukumoto, Shingo Tsunaki, Takumi Chigasaki, Yoshimi Hatsukade, Saburo Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 484, 202 - 205, Jan. 2013 , Refereed
    Summary:We have constructed an ultra-low field (ULF) nuclear magnetic resonance (NMR)/magnetic resonance imaging (MRI) system using an HTS-rf-SQUID and room-temperature electromagnets in a magnetically shielded room (MSR). In this study, in order to improve the signal to noise ratio (S/N) of the system, we introduced a permanent magnet instead of the electromagnet for pre-polarizing the sample to enhance the pre-polarizing field (B-p). The cylindrical permanent magnet of 270 mT was used to magnetize a water sample for several seconds outside the MSR and about 1.5 m away from the SQUID. We constructed an instrument to transfer the magnetized sample from the permanent magnet to under the SQUID in 0.5 s. Since the non-adiabatic condition cannot be kept in such sample transfer scheme, an AC pulse coil to apply an AC pulse field B-AC to rotate the magnetization moments for pi/2 was introduced to measure a free induction decay (FID) signal from the sample. By this system, we obtained an NMR signal from the water sample of 10 ml while applying a static field of 45 mu T and pi/2 pulse after the transfer. The S/N of the NMR spectrum was about 100 by a single shot, which was 10 times larger than that obtained with the electromagnet of 32 mT. In addition, we demonstrated the measurements of the longitudinal relaxation time (T-1) and the spin echo signal of the water sample by the system. (C) 2012 Elsevier B.V. All rights reserved.
  • SQUID NDE on braided carbon fiber reinforced polymers with middle-end fibers under step-by-step tensile loading, Yoshimi Hatsukade, Yohei Shinyama, Keisuke Yoshida, Takahiro Kage, Yuka Takai, Mohamed Aly-Hassan, Asami Nakai, Hiroyuki Hamada, Saburo Tanaka, IEEE Transactions on Applied Superconductivity, IEEE Transactions on Applied Superconductivity, 23(3), 1603205 - 1603205, 2013 , Refereed
    Summary:Three braided carbon fiber reinforced polymer (CFRP) samples with different middle-end fibers were fabricated. Damage mechanisms of the samples under step-by-step tensile loading were investigated using a nondestructive evaluation (NDE) method utilizing a high-temperature superconducting SQUID gradiometer. Commercial carbon fibers UTS50 were used for base braided fabrics, while UTS50, XN05 with higher electric resistivity, and XN60 with lower resistivity were used for the middle-end fibers. In the step-by-step tensile tests, observation of surfaces and measurements of stress-strain curves of the samples were carried out. At certain damage stages, the SQUID NDE method, which visualizes flowing currents in the samples, were applied to detect damage and assess the integrity of the carbon fiber yarns in the samples after removal of the loading. As a result, different damage mechanisms and stress-strain curves were observed and measured. From the results using the SQUID NDE method, it was shown that the current distributions in the samples were determined by the middle-end fibers at respective virgin stages, and the middle-end fibers XN60 were broken in some parts of the sample at its final fracture. © 2013 IEEE.
  • Metallic contaminant detection system using multi-channel high Tc SQUIDs, Saburo Tanaka, Yoshihiro Kitamura, Yoshimi Hatsukade, Takeyoshi Ohtani, Shuichi Suzuki, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 324(21), 3487 - 3490, Oct. 2012 , Refereed
    Summary:We have developed the magnetic metallic contaminant detectors using multiple high Tc SQUID gradiometers for industrial products. Finding ultra-small metallic contaminants is a big issue for manufacturers producing commercial products. The quality of industrial products such as lithium ion batteries can deteriorate by the inclusion of tiny metallic contaminants. When the contamination does occur, the manufacturer of the product suffers a great loss to recall the tainted products. Metallic particles with outer dimension less than 50 mu m cannot be detected by a conventional X-ray imaging. Therefore a high sensitive detection system for small foreign matters is required. However, in most of the cases, the matrix of an active material coated sheet electrode is magnetized and the magnetic signal from the matrix is large enough to mask the signal from contaminants. Thus we have developed a detection system based on a SQUID gradiometer and a horizontal magnetization to date. For practical use, we should increase the detection width of the system by employing multiple sensors. We successfully realized an eight-channel high-Tc SQUID gradiometer system for inspection of sheet electrodes of a lithium ion battery with width of at least 60 to 70 mm. Eight planar SQUID gradiometers were mounted with a separation of 9.0 mm. As a result, small iron particles of less than 50 mu m were successfully measured. This result suggests that the system is a promising tool for the detection of contaminants in a lithium ion battery. (C) 2012 Published by Elsevier B.V.
  • Characteristic Analysis of Directly Coupled HTS dc-SQUID Magnetometer With Superconducting Film Magnetic-Shield Considering Josephson-Junction Resistance, Naoya Terauchi, So Noguchi, Hajime Igarashi, Yoshimi Hatsukade, Saburo Tanaka, IEEE TRANSACTIONS ON MAGNETICS, IEEE TRANSACTIONS ON MAGNETICS, 48(2), 571 - 574, Feb. 2012 , Refereed
    Summary:A high temperature superconducting quantum interface device (HTS SQUID) is an extremely sensitive magnetic sensor. The HTS SQUID is required to have a high robustness with respect to magnetic noise for stable operation outside a magnetic shielding room. In order to achieve the high robustness of HTS SQUID, use of a magnetic shield with a superconducting film has been proposed, and its effectiveness has been confirmed in the experiments. In this paper, an electromagnetic field simulation was performed using the 3-D edge finite element method to confirm the effectiveness of the superconducting film magnetic-shield. Since both the SQUID magnetometer and the superconducting film magnetic-shield are made of HTS, it is required to consider the HTS characteristics in the electromagnetic field simulation. Additionally, the SQUID magnetometer has Josephson junction. In this paper, the property of the Josephson junction is also considered. The simulation accuracy depending on the type of the finite element mesh is also investigated.
  • Development of signal to noise ratio of HTS-rf-SQUID for ultra-low field NMR/MRI by 77K LC resonant circuit, Dan Zhang, Shohei Fukumoto, Shingo Tsunaki, Yoshimi Hatsukade, Saburo Tanaka, ADVANCES IN SUPERCONDUCTIVITY XXIV, ADVANCES IN SUPERCONDUCTIVITY XXIV, 27, 348 - 351, 2012 , Refereed
    Summary:We constructed an ultra-low field (ULF) nuclear magnetic resonance (NMR) / magnetic resonance imaging (MRI) system with a high temperature superconductor (HTS) radio-frequency (rf) superconducting quantum interference device (SQUID) coupled with a LC circuit inside a cryostat filled with liquid nitrogen. Several LC resonant circuits with 139 to 1500 turns coils made from copper wires of 0.2, 0.4, and 0.6 mm in diameter were tested to obtain the optimum configuration for the circuit. For each coil, a capacitance was selected to fix the resonance frequency at around 10 kHz. The LC resonant circuit using a 500 turns coil made from 0.2 mm diameter wire offered the largest signal-to-noise ratio (S/N) of 11.9 with a quality factor of 53.3 at 10.2 kHz and 77 K. With this circuit, the S/N of free induction decay (FID) signals was tested using the ULF SQUID-NMR/MRI system. (C) 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of ISS Program Committee.
  • Nondestructive evaluation of braided carbon fiber composites with artificial defect using HTS-SQUID gradiometer, Y. Shinyama, T. Yamaji, Y. Hatsukade, Y. Takai, M. S. Aly-Hassan, A. Nakai, H. Hamada, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 471(21-22), 1242 - 1245, Nov. 2011 , Refereed
    Summary:Braided carbon fiber reinforced plastics (CFRPs) are one of multifunctional materials with superior properties such as mechanical strength to normal CFRPs since the braided CFRPs have continuous fiber bundles. In this paper, we applied the current-injection-based nondestructive evaluation (NDE) method using a HTS-SQUID gradiometer to the braided CFRP for the detection of the breakage of the bundles. We prepared planar braided CFRP samples with and without artificial cracks of 1 and 2 mm lengths, and measured the current density distribution above the samples using the NDE method. In the measurement results, not only a few completely-cut bundles but also the additional partially-cut bundles were detected from decrease in the measured current density along the cut bundle around the cracks. From these results, we showed that it is possible to inspect a few partially-cut bundles in the braided CFRPs by the NDE method. (C) 2011 Elsevier B.V. All rights reserved.
  • Characteristics of an HTS-SQUID gradiometer with ramp-edge Josephson junctions and its application on robot-based 3D-mobile compact SQUID NDE system, Y. Hatsukade, K. Hayashi, Y. Shinyama, Y. Kobayashi, S. Adachi, K. Tanabe, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 471(21-22), 1228 - 1233, Nov. 2011 , Refereed
    Summary:In this paper, we investigated detailed behavior of novel HIS-dc-SQUID gradiometers with ramp-edge Josephson junctions (JJs) in both an ac magnetic field and a dc magnetic field. In the both fields, the novel gradiometers shows the superior performance to the conventional YBa(2)Cu(3)O(7-x) (YBCO) HIS-dc-SQUID gradiometer and a bare HIS-dc-SQUID ring with bicrystal JJs concerning durability against entry and hopping of flux vortices, probably due to their differential pickup coils without a grain boundary and multilayer structure of the ramp-edge JJs. A robot-based compact HIS-SQUID NDE system utilizing the novel gradiometer was reviewed, and detectability of the system to detect non-through cracks in a carbon fiber reinforced plastic (CFRP)/Al double-layer structure was demonstrated. A new excitation coil in which the supplied currents flowed in the orthogonal directions was applied to detect cracks that oriented vertical and parallel to the baseline of the gradiometer. (C) 2011 Elsevier B.V. All rights reserved.
  • Two-Channel HTS SQUID Gradiometer System for Detection of Metallic Contaminants in Lithium-Ion Battery, S. Tanaka, T. Akai, Y. Kitamura, Y. Hatsukade, T. Otani, S. Suzuki, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 21(3), 424 - 427, Jun. 2011 , Refereed
    Summary:A two-channel high-T(c) SQUID gradiometer system for the detection of magnetic foreign matter in a lithium-ion battery was developed. Finding ultra-small metallic foreign particles can be a big issue for a manufacturer that produces commercial products such as lithium-ion batteries. If the presence of such particles is detected in its products, the manufacturer has to recall the products and thereby suffers a significant loss. Previously, we developed a detection system based on a single-channel SQUID gradiometer and horizontal magnetization. For practical use, we need to increase the detection width of the system by employing multiple sensors. In this paper, we present a two-channel high-T(c) SQUID gradiometer system for the inspection of a lithium-ion battery. In order to increase the inspection width, two SQUID gradiometers were employed along with a specially designed cryostat. As a result, small iron particles with a diameter of less than 100 mu m were detected by the system with a width of 22 mm. This is the first multi-channel high-T(c) SQUID gradiometer system for detection of the contaminants in a lithium-ion battery.
  • HTS Rf-SQUID Microscope for Metallic Contaminant Detection, Makoto Takemoto, Tomonori Akai, Yoshihiro Kitamura, Yoshimi Hatsukade, Saburo Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 21(3), 432 - 435, Jun. 2011 , Refereed
    Summary:We have developed metallic contaminant detection systems using HTS-SQUIDs. In this study, we designed and fabricated a single-chip HTS rf-SQUID using SQUID microscope techniques to reduce both the lift-off and cooling temperature as compared with the substrate resonator HTS rf-SQUID. The HTS rf-SQUID was a washer-type rf-SQUID without a flux focuser. By lengthening and narrowing the SQUID hole, we showed that the inductance of the SQUID ring was reduced, and the effective area and the field noise were improved consequently. By introducing a single-chip HTS rf-SQUID with hole size of 800 mu m x 50 mu m into the detection system, we obtained a field sensitivity of 150 fT/Hz(1/2) and a lift-off of 1.5 mm. Since this SQUID has advantages in the reduction of lift-off and cooling temperature, its detectability and magnetic field resolution are superior to that of the substrate resonator SQUID. Finally, we showed the single-chip SQUID can detect 20 mu m in diameter iron balls.
  • Liquid-State Nuclear Magnetic Resonance Measurements for Imaging Using HTS-rf-SQUID in Ultra-Low Field, S. Fukumoto, M. Hayashi, Y. Katsu, M. Suzuki, R. Morita, Y. Naganuma, Y. Hatsukade, S. Tanaka, O. Snigirev, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 21(3), 522 - 525, Jun. 2011 , Refereed
    Summary:In our study, we constructed a ultra-low field (ULF) nuclear magnetic resonance (NMR)/magnetic resonance imaging (MRI) system employing a high-temperature superconductor (HTS)-rf-SQUID and room-temperature coils. In the system, we employed a pulsed polarizing field B(p) perpendicular to a measurement field; a high-speed switching circuit with an optical FET was used to switch off B(p) of approximately 30 mT. When a field gradient dB(z)/dz of approximately 10 nT/cm was applied to a sample, which was designed to contain water in two compartments, a (1)H-NMR spectrum with two peaks was observed. The frequency difference between the two peaks roughly corresponded to the distance between each center of the water in the two parts. We measured the (1)H-NMR signals for water and mineral oil and found a clear difference in their signal amplitudes owing to their different molecular compositions. The longitudinal relaxation times T(1) of water and the oil were also estimated by changing the polarizing time of B(p). From these results, it was confirmed that (1)H- and T(1)-weighted contrast imaging could be realized by using this system.
  • Integrated High-Temperature Superconductor Radio-Frequency Superconducting Quantum Interference Device Covered with Superconducting Thin Films in Flip-Chip Configuration, Yoshimi Hatsukade, Makoto Takemoto, Ryuichi Kurosawa, Saburo Tanaka, APPLIED PHYSICS EXPRESS, APPLIED PHYSICS EXPRESS, 4(6), 063101 - 063101, Jun. 2011 , Refereed
    Summary:We developed integrated high-temperature superconductor (HTS) rf superconducting quantum interference devices (SQUIDs) with various hole shapes on bicrystal SrTiO3 substrates. Single-layer YBa2Cu3O7-x thin-film technology and bicrystal Josephson junctions were employed to take advantage of a simple fabrication process. The HTS rf SQUID with a hole of 800 x 50 mu m(2) had the lowest inductance and showed the best noise characteristics among the tested SQUIDs. The 1/f noise profile of the HTS rf SQUID, which was covered with HTS thin films on the grain boundary and/or the slit of the SQUID in a flip-chip configuration, was dramatically improved in a frequency range of less than 100 Hz. (C) 2011 The Japan Society of Applied Physics
  • Development of Ultra Low Field Nuclear Magnetic Resonance Imaging System Using HTS rf SQUID, O. Snigirev, M. Hayashi, S. Fukumoto, Y. Hatsukade, Y. Katsu, S. Tanaka, JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 24(1-2), 1033 - 1036, Jan. 2011 , Refereed
    Summary:We constructed and studied an ultra low-field nuclear magnetic resonance imaging system using a HTS rf SQUID and room-temperature coils. We recorded the free induction decay signals of (1)H by employing a measuring field, B (m), of 44.8 mu T and a polarizing field, B (p), of 36.8 mT; in the presence of a, B (Z) /a, z and a, B (Z) /a, y gradients of the order of 0.8 mu T/m, we were able to obtain a quasi two-dimensional 4-pixels image of a simple water phantom.
  • Evaluation of joint interface of friction stir welding between dissimilar metals using HTS-SQUID gradiometer, Y. Mashiko, Y. Hatsukade, T. Yasui, H. Takenaka, Y. Todaka, M. Fukumoto, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 470(20), 1524 - 1528, Nov. 2010 , Refereed
    Summary:In this study, we investigated conductive properties of joint interfaces of friction stir welding (FSW) between dissimilar metals, stainless steel SUS304 and aluminum A6063, using a SQUID nondestructive evaluation (NDE) system. With current injection method, the current maps above the FSW specimens jointed under various conditions were measured by a HTS-SQUID gradiometer. The conductivities of the joint interfaces, which were estimated from the current maps, differed between the joint conditions. By destructive tests using optical microscope, large voids were observed on the joint interfaces with low welding speed that generated excess heating. In case of one specimen, which was welded with welding speed of 500 and 200 mm/min, the conductivity of the former was higher than that of the latter, although the inside voids in the respective regions were not much different. From these results, it is suggested that the current maps were influenced not only by the conductivity of the joint interface but also by inside voids. By hardness test on the SUS boards near the interfaces, only the SUS jointed with 200 mm/min was about half softer than its matrix. (C) 2010 Elsevier B.V. All rights reserved.
  • Application of SQUID to magnetic contaminant detection, S. Tanaka, T. Akai, M. Takemoto, Y. Hatsukade, T. Ohtani, Y. Ikeda, S. Suzuki, S. Adachi, K. Tanabe, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 470(20), 1507 - 1510, Nov. 2010 , Refereed
    Summary:We have developed a magnetic metallic contaminant detector using a high-temperature superconducting quantum interference device (HTS-SQUID) gradiometer for industrial products such as lithium ion batteries. Finding ultrasmall metallic contaminants is a critical issue for manufacturers producing commercial products such as lithium ion batteries. When contamination occurs, the manufacturer incurs a great loss in recalling the tainted products. We employed a permanent ring magnet for magnetizing the products in order to generate remnant fields only at the ends of the products, thereby reducing their impact in masking the field from a contaminant. For practical applications, the detection width of a sensor must be sufficiently large to identify an inclusion from above the product during inspection. Here, we made a large SQUID gradiometer 8 mm in width and compared its detection width with that of a conventional small sensor 3 mm wide. We found that the effective detection width of the 8 mm sensor was 11.6 mm. It was 1.8 times larger than that of the small sensor. Finally, a test of the system's performance revealed that iron particles as small as 50 mu m x 50 mu m on the electrode of a lithium ion battery could be detected clearly. (C) 2010 Elsevier B.V. All rights reserved.
  • Development of low field nuclear magnetic resonance system using HTS rf SQUID, M. Hayashi, Y. Hatsukade, Y. Katsu, S. Fukumoto, S. Tanaka, 9TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS 09), 9TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS 09), 234(234), 042013 - 042013, 2010 , Refereed
    Summary:We constructed a low-field (LF) nuclear magnetic resonance (NMR) system using a HTS rf SQUID and room-temperature (RT) coils. In the system, a measurement field coil, a polarizing coil and ac pulse coil were employed. In addition, gradient coils were introduced to compensate the remnant field gradient around the sample and to improve the homogeneity of B-m. With gradient coils, the spin-spin relaxation time T-2* of a free induction decay (FID) signals of H-1 was 2.2 s, 1.7 times longer than that without gradient coil in an experiment employing B-m of 44.8 mu T and B-p of 36.8 mT. The conditions of B-ac (amplitude, duration) to rotate the magnetized vector of H-1 by a certain angle were experimentally studied for application of a 90 degrees - 180 degrees spin echo sequence. It was also found that the minimum delay time for applying the 180 degrees pulse to obtain the spin echo signal of H-1 was approximately 2.5 s.
  • Determination of the robustness of an HTS SQUID magnetometer covered with a superconducting film shield in an ac magnetic field, Y. Hatsukade, K. Hayashi, M. Takemoto, S. Tanaka, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 22(11), 114010, Nov. 2009 , Refereed
    Summary:A simple flip-chip configuration of YBa(2)Cu(3)O(7-x) (YBCO) square and cross-shaped films overlapping on a directly coupled multi-pickup-loop HTS dc-SQUID magnetometer was tested to enhance the robustness of the HTS SQUID magnetometer in an ac magnetic field. The YBCO films were expected to work as a superconducting shield to prevent flux vortices from entering and moving in the device. With the shields, most of the SQUID's characteristics such as critical current I(c), modulation voltage V(pp), magnetic flux noise S(phi)(1/2), effective area A(eff), and magnetic field noise S(B)(1/2) were enhanced. The robustness of the magnetometer in an applied ac magnetic field was successfully enhanced by the coverage with the shields, particularly the cross-shaped shield. It is inferred that the cross-shaped shield reduced flux trapping and jumping in the SQUID ring and at the edges of the pickup loops.
  • High Tc SQUID Detection System for Metallic Contaminant in Lithium Ion Battery, Saburo Tanaka, T. Akai, Y. Hatsukade, T. Ohtani, Y. Ikeda, S. Suzuki, K. Tanabe, IEEE TRANSACTIONS ON MAGNETICS, IEEE TRANSACTIONS ON MAGNETICS, 45(10), 4510 - 4513, Oct. 2009 , Refereed
    Summary:A highly sensitive detection system for magnetic contaminants using a High-Tc superconducting quantum interference device ( SQUID) was developed. Finding ultra-small metallic contaminants is a big issue for manufacturers producing commercial products such as lithium ion batteries. When the contamination does occur, the manufacturer of the product suffers a great loss to recall the tainted products. The outer dimension of metallic particles less than 100 microns can not be detected by X-ray imaging, which is commonly used as the inspection method. In most cases, the matrix of industrial products is magnetized and the magnetic signal from the matrix is large enough to mask the signal from contaminants. We developed a detection system based on a high-Tc SQUID gradiometer. A specially designed low noise planar gradiometer for the system was developed. The flux white noise level of the SQUID gradiometer was 8-16 Hz mu phi(0)/Hz(1/2) at 1 kHz. Use of the gradiometer and horizontal magnetization could solve problem above. We tested the performances of the system and found that small iron particles as small as 50 mu m x 50 mu m on the electrode of the lithium ion battery could be clearly detect. This detection level is difficult to achieve using other methods.
  • Detection of wire element breakage in power transmission line using HTS-SQUID, A. Miyazaki, Y. Hatsukade, H. Matsuura, T. Maeda, A. Suzuki, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 469(15-20), 1643 - 1648, Aug. 2009 , Refereed
    Summary:We have proposed the application of nondestructive evaluation (NDE) using HTS-SQUID gradiometer to detect wire breakage in compressive conductor joints in overhead transmission line. In this study, we prepare an aluminum conductor steel reinforced (ACSR) transmission line with a broken wire. The ends of the ACSR cable were compressed with Al sleeves. An AC current was injected toward into the cable axis by applying AC voltage across the both ends of the sleeves. Then the two-dimensional distribution of magnetic field gradient above the cable was measured by a HTS-SQUID gradiometer. In the case of the compressed ACSR with a wire breakage, the field gradient changed periodically along the spiral of the broken wire. In contrast, such changes did not appear above the ACSR cable without defects. These results suggested the possibility to detect the wire breakage in the compressive conductor joints by this method. We also conducted electromagnetic field simulation to verify the experimental results. (C) 2009 Elsevier B.V. All rights reserved.
  • Eddy-Current-Based SQUID-NDE System for Copper Tubes With Laser Displacement Sensor, Sho Kanai, Yoshimi Hatsukade, Keita Hayashi, Kazuaki Mori, Saburo Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 19(3), 786 - 790, Jun. 2009 , Refereed
    Summary:An eddy-current-based SQUID-NDE system has been developed to detect shallow surface defects of less than 50 mu m in depth on heat-exchanger copper tubes using a HTS-SQUID and excitation coil. In this system, small surface displacement of a tube, variation of the tube thickness and inner ripples cause background magnetic noise besides the surface defects. In this study, main factors of the background magnetic noise were investigated by a HTS-SQUID gradiometer, laser displacement sensor and laser microscope. The magnetic response, surface displacement, outer diameter variation and radial thickness of straight tubes of 9.6 mm in outer diameter and 0.4mmin thickness were measured. The experimental results suggested that the main factor of the background magnetic noise was not due to local shape displacement near the SQUID, but nonuniformity in tube shape mainly originated inside of the tube. In the case of a tube with inner ripples and a outer-surface defect, large periodical magnetic noise from ripples was measured. Noise reduction method to reduce the periodical magnetic background noise due to the inner ripple was also investigated. The periodical noise due to the ripples was significantly decreased at higher frequency than 300 kHz, where the skin depth into copper was about 0.1 mm, while the magnetic response from the defect of 30 mu m depth on the tube surface was successfully detected.
  • Robot-Based NDE System Using 3D-Mobile HTS-SQUID, Yoshimi Hatsukade, Kohe Yotsugi, Sho Kanai, Keita Hayashi, Hironori Wakana, Yoshinobu Tarutani, Keiichi Tanabe, Saburo Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 19(3), 796 - 800, Jun. 2009 , Refereed
    Summary:A novel HTS-SQUID gradiometer with ramp-edge Josephson junctions (JJs) composed of SmBa(2)Cu(3)O(y) base-electrode and La(01)Er(0.95)Ba(1.95)Cu(3)O(y) counter-electrode was developed. The robustness of the gradiometer in AC field perpendicular to the device plane was investigated. In an AC field of less than 2.8 mT(pp) at 100 Hz, flux-trapping, jumping and increase in noise did not happen in the gradiometer, while a traditional HTS-SQUID gradiometer with YBa(2)Cu(3)O(7-x) thin film and bicrystal JJs with the same dimension as the novel gradiometer could not be operated properly in an AC field of about several tens nT(pp). A robot-based NDE system utilizing the novel HTS-SQUID gradiometer was developed. The system could move the gradiometer three-dimensionally (3D) in an unshielded environment without magnetic shielding or compensation technique. Eddy-current-based detection of a through hole in magnetized stainless steel board was demonstrated by the robot-based HTS-SQUID NDE system.
  • High Tc SQUID System for Detection of Small Metallic Contaminant in Industrial Products, Saburo Tanaka, Tomonori Akai, Yoshimi Hatsukade, Takeyoshi Ohtani, Shuichi Suzuki, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 19(3), 882 - 885, Jun. 2009 , Refereed
    Summary:A three channel High-Tc SQUID system for detection of magnetic contaminants in industrial products was developed. Finding ultra-small metallic contaminants is a big issue for manufacturers producing commercial products such as lithium ion batteries. When the contamination does occur, the manufacturer of the product suffers a great loss to recall the tainted products. The outer dimension of metallic particles less than 100 micron can not be detected by X-ray imaging, which is commonly used as the inspection method. Therefore, a highly sensitive detection system for small contaminants is required. We developed a detection system based on a three channel high-Tc SQUID microscope with a high performance magnetic shield. Three SQUIDs were installed in one microscope-type cryostat with a 3 sapphire vacuum window which separates the SQUID and atmosphere. This design enables the SQUID to approach an object to be measured as close as 1 mm. The minimal detectable size of the particle is also highly dependent on the magnetic field noise of the SQUID. Therefore, we employed double transformer coupling, which lowers the noise. One transformer was placed at 77 K and the other was at room temperature (RT). As a result, the magnetic field noise of the SQUID was reduced by 36%. Finally we could successfully measure small iron particles as small as 30 micron. This detection level was difficult to achieve when using a conventional X-ray detection method.
  • Study of inspection of wire breakage in aluminum transmission line using SQUID, Y. Hatsukade, A. Miyazaki, H. Matsuura, T. Maeda, A. Suzuki, S. Tanaka, NDT & E INTERNATIONAL, NDT & E INTERNATIONAL, 42(3), 170 - 173, Apr. 2009 , Refereed
    Summary:Taking advantage of the unsurpassed high-magnetic sensitivity of high-temperature superconductor (HTS) superconducting quantum interference device (SQUID). HTS-SQUID-non-destructive evaluation (NDE) technique was applied to detection of single wire breakage in hard-drawn aluminum transmission line (HAL), which was twisted from 19 aluminum wires. While applying AC current of 2.6 mA at 200 Hz to the HAL, distribution of magnetic field gradient above the HAL was two-dimensionally scanned by a HTS-SQUID gradiometer. A periodic pattern was detected along the locus of the broken wire in the distribution from the HAL with wire breakage, while such pattern was not observed in that from normal HAL without wire breakage. These results indicate the possibility of detection of single wire breakage by the magnetic inspection technique. (c) 2008 Elsevier Ltd. All rights reserved.
  • SQUID sensor application for small metallic particle detection, Saburo Tanaka, Yoshimi Hatsukade, Takeyoshi Ohtani, Shuichi Suzuki, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 321(7), 880 - 883, Apr. 2009 , Refereed
    Summary:High-Tc superconducting quantum interference device ( SQUID) is an ultra-sensitive magnetic sensor. Since the performance of the SQUID is improved and stabilized, now it is ready for application. One strong candidate for application is a detection system of magnetic foreign matters in industrial products or beverages. There is a possibility that ultra-small metallic foreign matter has been accidentally mixed with industrial products such as lithium ion batteries. If this happens, the manufacturer of the product suffers a great loss recalling products. The outer dimension of metallic particles less than 100 mm cannot be detected by an X-ray imaging, which is commonly used for the inspection. Ionization of the material is also a big issue for beverages in the case of the X-ray imaging. Therefore a highly sensitive and safety detection system for small foreign matters is required. We developed detection systems based on high-Tc SQUID with a high-performance magnetic shield. We could successfully measure small iron particles of 100 mm on a belt conveyer and stainless steel balls of 300 mm in water. These detection levels were hard to be achieved by a conventional X-ray detection or other methods. (C) 2008 Published by Elsevier B. V.
  • High T-c SQUID Detector for Magnetic Metallic Particles in Products, Saburo Tanaka, Tomonori Akai, Yoshimi Hatsukade, Shuichi Suzuki, IEICE TRANSACTIONS ON ELECTRONICS, IEICE TRANSACTIONS ON ELECTRONICS, E92C(3), 323 - 326, Mar. 2009 , Refereed
    Summary:High-T-c superconducting quantum interference device (SQUID) is an ultra-sensitive magnetic sensor. After the discovery of the high-T-c superconducting, materials, the performance of the high-T-c SQUID has been improved and stabilized. One strong candidate for application is it detection system of magnetic foreign matters in industrial products. There is it possibility that ultra-small metallic foreign matter has been accidentally mixed with industrial products such its lithium ion batteries. If this happens. the manufacturer of the product suffers a great loss recalling products. The Outer dimension of metallic particles less than 100 micron cannot be detected using X-ray imaging, which is commonly used for the inspection. Therefore it highly sensitive system for small foreign matters is required. We developed detection systems based on high-T-c SQUID for industrial products. We Could successfully detect small iron particles of less than 50 micron on it belt conveyer. These detection levels were hard to he achieved using conventional X-ray detection or other methods.
  • Multi-channel high-T(c) SQUID system for bio-applications, Y. Hatsukade, K. Noda, S. Masaki, S. Yoshida, S. Tanaka, MAGNETISM AND MAGNETIC MATERIALS, MAGNETISM AND MAGNETIC MATERIALS, 152-153, 424 - 427, 2009 , Refereed
    Summary:Three-channel directly-coupled-type high-T(c) SQUID magnetometer array, with pick-up coil size of 1.5 mm(2) comparable to the lift-off distance of the developed multi-channel SQUID system, was designed. In this design, two slits were introduced in the SQUID ring to improve the inductive coupling between the pick-up coil and the SQUID ring to obtain the field sensitivity of about 700 fT/Hz(1/2). With the SQUID array that was mounted on the multi-channel SQUID system, the measurements of magnetocardiogram of rat were demonstrated to evaluate the system performance.
  • Shield Duct to Prevent Magnetic Field Leakage Through Openings in Double-Layered Magnetically Shielded Rooms, Keita Yamazaki, Yoshimi Hatsukade, Saburo Tanaka, Akira Haga, IEEE TRANSACTIONS ON MAGNETICS, IEEE TRANSACTIONS ON MAGNETICS, 44(11), 4187 - 4190, Nov. 2008 , Refereed
    Summary:This paper describes an optimal length and combination of short shield ducts to prevent the leakage of magnetic flux through the openings of a double-layered magnetically shielded room (MSR) used for electron-beam lithography systems and biomagnetic measurements. A number of openings as large as 500 x 500 mm must be provided in the walls, ceiling, and floor of such MSRs for air conditioning and cables. First, the magnetic field leakage from the openings, using a small model of an MSR, was measured with short shield ducts of various lengths in order to confirm the validity of the analysis and practical realization. Next, the distributions of the magnetic fields inside the small model were evaluated using 3-D magnetic field analysis and the finite element method. The method of analysis was verified by comparing computed results with those measured. We show the optimal length of shield duct attached around the openings as follows: The optimal combination of short shield ducts is an outer layer duct which is the same length as the width of the opening with an inner layer duct which is half the length of the opening. These lengths of duct accord with the optimal lengths when the outer and inner layer ducts are employed as a single duct. The leakage flux of the optimal single duct through the opening can be decreased to a half by the optimal combination of shield ducts. This also corresponds to the fact that the length of the inner layer duct should not protrude from the outer layer in order to avoid collecting surplus fluxes outside the magnetically shielded room.
  • Mobile HTS-SQUID NDE system with robot arm and active shielding using fluxgate, Y. Hatsukade, K. Yotsugi, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 468(15-20), 1932 - 1935, Sep. 2008 , Refereed
    Summary:A robot-arm-based mobile HTS-SQUID NDE system was developed for inspection of advanced structures such as hydrogen fuel cell tanks. In order to realize stable operation of HTS-SQUID exposed in Earth's field and robot arm's noise without flux trapping, flux jumping and unlocking during motion, a new active magnetic shielding (AMS) technique using fluxgate was introduced. The high sensitive fluxgate, which could measure magnetic field of up to several 10 mu T, was mounted near an HTS-SQUID gradiometer on the robot arm to measure the ambient noise and feed back its output to a compensation coil, which surrounded both SQUID and fluxgate to cancel the ambient noise around them. The AMS technique successfully enabled the FITS-SQUID gradiometer to be moved at 10 mm/s by the robot arm in unshielded environment without flux trapping, jumping and unlocking. Detection of hidden slots in multi-layer composite-metal structures imitating the fuel cell tank was demonstrated. (c) 2008 Elsevier B.V. All rights reserved.
  • Metallic contaminant detection system for industrial products by high Tc squid magnetic sensor, Saburo Tanaka, Hiroyoshi Fujita, Yoshimi Hatsukade, Takeyoshi Otani, Shuichi Suzuki, MODERN PHYSICS LETTERS B, MODERN PHYSICS LETTERS B, 22(11), 1075 - 1080, May 2008 , Refereed
    Summary:High-Tc superconducting quantum interference device (SQUID) system for detection of magnetic foreign matter in industrial products was developed. There is a possibility that ultra-small metallic foreign matter has been accidentally mixed with industrial products, such as lithium ion batteries. The outer dimension of metallic particles less than 100 microns cannot be detected by conventional X-ray imaging. Therefore, we developed a detection system based on high-Tc SQUID microscopes with a high-performance magnetic shield. Using SQUID microscopes with a 0.5 mm-thick vacuum window was proposed. This design enables the SQUID to approach an object to be measured as close as 1 mm and enhances the sensitivity. A new magnetic shield with sleeves was carefully designed and built. As a result, we could successfully measure a small iron particle with 100 mu m. This detection level was hard to achieve by conventional X-ray detection methods.
  • Non-destructive inspection using HTS-SQUID on aluminum liner covered by CFRP, Y. Hatsukade, K. Yotsugi, Y. Sakaguchi, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 463, 1043 - 1047, Oct. 2007 , Refereed
    Summary:An eddy-current-based SQUID non-destructive inspection (NDI) system to detect deep-lying cracks in multi-layer composite-Al vessels was developed taking advantage of the uncontested sensitivity of HTS-SQUID in low-frequency range. An HTS-SQUID gradiometer was mounted in a pulse tube cryocooler. A pair of differential coils with C-shaped ferrite cores was employed to induce an enhanced eddy current in an Al vessel wrapped in a carbon fiber reinforced plastic (CFRP) cover. Ellipsoidal dome-shaped Al liners containing through cracks, which were made by pressure cycle tests, in the CFRP covers with total thickness of 6 mm (CFPR 3 mm, and Al 3 mm) were inspected by the system. While inducing eddy currents in the vessels with excitation fields at 100 Hz or 7 kHz, the vessels were rotated under the HTS-SQUID. Above the cracks, anomalous signals due to the cracks were clearly detected at both frequencies. These results suggested the SQUID-NDI technique would be a possible candidate for inspection of high-pressure multi-layer composite-Al vessels. (C) 2007 Elsevier B.V. All rights reserved.
  • Study on nondestructive inspection using HTS-SQUID for friction stir welding between dissimilar metals, Y. Hatsukade, T. Takahashi, T. Yasui, M. Tsubaki, M. Fukumono, S. Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 463, 1038 - 1042, Oct. 2007 , Refereed
    Summary:We have developed an SQUID-NDI technique for evaluation of friction stir welding (FSW) between aluminum alloy A6063 and stainless steel SUS304 from the electric conductivities in board specimens bonded by FSW. A SQUID-NDI system employing an HTS-SQUID gradiometer was constructed to measure current distribution in the FSW specimens by applying voltage to the specimen. By measuring field gradients dB(z)/dy and dB(z)/dx above the FSW specimens made with various FSW conditions and then converting them to current vector J(x) and J(y), conductivities of FSW areas were estimated. Due to the difference in the FSW conditions, the conductivity distributions varied dramatically. From these results, it was suggested that the conductivities in FSW areas should be varied due to the temperature heated by the friction between the milling tool and the materials. (C) 2007 Elsevier B.V. All rights reserved.
  • Eddy-current-based SQUID-NDE for detection of surface flaws on Copper tubes, Yoshimi Hatsukade, Shinya Okuno, Kazuaki Mori, Saburo Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 17(2), 780 - 783, Jun. 2007 , Refereed
    Summary:An eddy-current-based SQUID-NDE system has been developed to detect shallow surface flaws of less than. 50 mu m in depth on heat-exchanger copper tubes using an HTS-SQUID gradiometer and an Helmholtz-coil-type inducer. In this study, detectable flaw sizes on the tubes were investigated by experiments and simulation. Copper tube specimens with flaws of various sizes were inspected by the system with an excitation field of 5.6 mu T at 3 kHz. A magnetic anomaly due to the shallowest flaw of 10 mu m depth, 100 mu m width and 15 mm length was successfully detected. The experimental results showed that the magnetic signal amplitude due to a flaw was proportional to the effective flaw size given by the product of flaw depth, width and length. A numerical simulation was carried out to calculate the magnetic signal from a flaw on a copper tube to determine the dependence on the flaw size. It is concluded that a flaw with a volume of 10(6) mu m(3) should be detectable by improving the system parameters.
  • Free electron laser-induced photocurrent in high-T-c superconducting YBa2Cu3O7-x films, K. Nishi, Y. Hatsukade, S. Tanaka, K. Awazu, H. Horiike, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 310(2), 509 - 510, Mar. 2007 , Refereed
    Summary:We investigate the high- temperature YBa2Cu3O7-x superconductors by method using a free electron laser ( FEL). The method is a type of photoelectron spectroscopy and called a FEL internal photoemission. It is found that when the YBa2Cu3O7-x. film is irradiated by FEL, the photocurrent is induced in an unbias condition. (c) 2006 Elsevier B. V. All rights reserved.
  • Experimental study of detectable sizes of surface flaws on copper tubes by nondestructive inspection using high-T-c superconducting quantum interference device, Yoshimi Hatsukade, Shinya Okuno, Kazuaki Mori, Saburo Tanaka, JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 45(33-36), L980 - L983, Sep. 2006 , Refereed
    Summary:Detectable sizes of shallow flaws on thin copper tubes were experimentally investigated. using an eddy-current-based nondestructive inspection system with a high-T-c superconducting quantum interference device (SQUID) gradiometer. At an excitation field of 5.6 mu T at 3 kHz, a magnetic anomaly due to the shallowest flaw of 10 mu m depth, 100 mu m width, and 15 mm length on the surface of a tube specimen of 6.35 mm outer diameter and 0.8 mm thickness was successfully measured. Signal amplitude due to a flaw was proportional to effective flaw volume that made an induced eddy current detour. The experimental results indicate that the detectable volume of a surface flaw on a copper tube should be 1 x 10(6) mu m(3) with some increase in signal-to-noise ratio.
  • A food contaminant detection system based on high-T-c SQUIDs, S Tanaka, H Fujita, Y Hatsukade, T Nagaishi, K Nishi, H Ota, T Otani, S Suzuki, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 19(5), S280 - S283, May 2006 , Refereed
    Summary:We have designed and constructed a computer controlled food contaminant detection system for practical use, based on high-T-c SQUID detectors. The system, which features waterproof stainless steel construction, is acceptable under the HACCP (Hazard Analysis and Critical Control Point) programme guidelines. The outer dimensions of the system are 1500 mm length x 477 mm width x 1445 mm height, and it can accept objects up to 200 mm wide x 80 mm high. An automatic liquid nitrogen filling system was installed in the standard model. This system employed a double-layered permeable metallic shield with a thickness of 1 mm as a magnetically shielded box. The distribution of the magnetic field in the box was simulated by FEM; the gap between each shield layer was optimized before fabrication. A shielding factor of 732 in the Z-component was achieved. This value is high enough to safely operate the system in a non-laboratory environment, i.e., a factory. During testing, we successfully detected a steel contaminant as small as 0.3 mm in diameter at a distance of 75 mm.
  • SQUID NDE for in situ inspection of copper heat exchanger tubes, Y Hatsukade, A Kosugi, N Ishizaka, S Okuno, K Mori, S Tanaka, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 19(3), S149 - S151, Mar. 2006 , Refereed
    Summary:An eddy-current-based SQUID NDE system was constructed for in situ inspection of copper heat exchanger tubes using an HTS SQUID gradiometer and a Helmoltz-type-coil inducer. Thin copper tubes of 6.35 mm in diameter and 0.8 mm in thickness were selected from products as specimens. Artificial flaws of 100 mu m in width, 15-25 mm in length and 10-50 mu m in depth were made on the surfaces of the tubes. The tubes were moved at a velocity of 1.6-32 m min(-1) by a motor through the Helmholtz-type coil, which generated an excitation field of 10 mu T at 3 kHz. The SQUID NDE system Could detect an anomalous magnetic response due to a flaw of 10 mu m in depth on the tube moving at 32 m min(-1).
  • Stabilized pulse tube cryocooler system with infrared lamp heater for SQUID magnetic sensor, Saburo Tanaka, Soichiro Iwao, Yoshimi Hatsukade, SENSORS AND MATERIALS, SENSORS AND MATERIALS, 18(3), 131 - 137, 2006 , Refereed
    Summary:A pulse tube cryocooler superconducting quantum interference device (SQUID) cooling system, in which temperature was controlled by an infrared source, was proposed. A high-Tc SQUID magnetometer was mounted and cooled by a coaxial pulse tube cryocooler. A light from a halogen lamp was guided by a quartz flexible bundle fiber and was introduced to the cold head. The output power of the lamp was controlled by a temperature controller in accordance with the cold-stage temperature. As a result, the flux noise of the SQUID output was not changed in the range of 1 to 1000 Hz regardless of the lamp power. The temperature could be controlled at 77 K with an accuracy of 0.03 K +/- for a long time duration of more than 2 h. This demonstrated that the system can be applied to any application such as non destructive evaluation (NDE) systems.
  • Detection of micro-flaws on thin copper tubes using SQUID-NDI system based on eddy current technique, Y Hatsukade, A Kosugi, K Mori, S Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 426, 1585 - 1590, Oct. 2005 , Refereed
    Summary:We constructed a SQUID-NDI system for inspection of micro-flaws on heat exchanger copper tubes employing HTS-SQUID gradiometer and Helmholtz-coil-type inducer. The HTS-SQUID gradiometer was cooled using a coaxial pulse tube cryocooler. The detection of artificial flaws several tens of mu m in depth on copper tubes, 6.35 mm in outer diameter and 0.825 mm in thickness, was demonstrated using the SQUID-NDT system. With excitation field of 1.6 mu T at 5 kHz, the system could detect a 30-mu m-depth flaw with SN ratio of about 20, where conventional NDI methods should fail to detect. The amplitude of the magnetic signal due to the flaw was in proportion to the square of flaw depth. Taking into account of the system's noise level, the results suggest that the SQUID-NDI system has a potential to detect sub-10-mu m-depth flaws on copper tubes. (c) 2005 Elsevier B.V. All rights reserved.
  • Mobile cryocooler-based SQUID NDE system utilizing active magnetic shielding, Y Hatsukade, T Inaba, Y Maruno, S Tanaka, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 15(2), 723 - 728, Jun. 2005 , Refereed
    Summary:A mobile cryocooler-based SQUID NDE system was developed for realization of NDE of fixed targets that can't be moved or rotated. In order to move the SQUID in an ambient field, an active magnetic shielding technique employing a compensation coil and feedback circuit including a band elimination filter was introduced in a SQUID NDE system. The HTS SQUID gradiometer was cooled by a coaxial pulse tube cryocooler to 74 K +/- 0.04 K. The flux noise caused by moving the SQUID at 32 mm/s was well suppressed. Unlocking of the flux-locked loop (FLL) circuit or a significant increase in noise did not occur during the motion. Detection of hidden slots in fixed single and double-layered carbon/carbon composites in ambient field was demonstrated by moving the HTS SQUID gradiometer.
  • A DNA detection system based upon a high TcSQUID and ultra-small magnetic particles, S Tanaka, Z Aspanut, H Kurita, C Toriyabe, Y Hatsukade, S Katsura, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 15(2), 664 - 667, Jun. 2005 , Refereed
    Summary:A high Tc SQUID system for biological molecules (DNA) detection is developed. This system is based on a hybridization process. Two strands in a DNA molecule are held together by hydrogen bonds between base pairs like a ladder. The two strands are referred to as being complementary each other. HPVB 33 (Human Papillomavirus Probes 33) was prepared as a DNA. One strand (Sample DNA) was labeled with Fe3O4 ultra-small magnetic particles and the other (probe DNA) was anchored on a glass slide. Then they were hybridized each other on the slide. After washing the excess sample DNA, the hybridized DNA was evaluated in the presence of excitation ac field by high Tc SQUID. The signal was initially proportional to the concentration of the sample DNA and then saturated. It means that the hybridization occurred successfully between the sample DNA and the probe DNA.
  • High-T-c SQUID metal detection system for food and pharmaceutical contaminants, S Tanaka, S Kudo, Y Hansukade, T Nagaishi, K Nishi, H Ota, S Suzuki, IEICE TRANSACTIONS ON ELECTRONICS, IEICE TRANSACTIONS ON ELECTRONICS, E88C(2), 175 - 179, Feb. 2005 , Refereed
    Summary:There is a possibility that individuals ingest contaminants that have been accidentally mixed with food because processed foods have become very common. Therefore a detection method of small contaminants in food and pharmaceuticals is required. High-T-c SQUID detection systems for metallic contaminants in foods and drugs have been developed for safety purposes. We developed two systems; one large system is for meat blocks and the other small system is for powdered drugs or packaged foods. Both systems consist of SQUID magnetometers, a permanent magnet for magnetization and a belt conveyor. All samples were magnetized before measurements and detected by high T-c SQUIDs. As a result, we successfully detected small syringe needles with a length of 2 mm in a meat block and a stainless steel ball as small as 0.3 mm in diameter.
  • Detection of deep-lying defects in carbon fiber composites using SQUID-NDE system cooled by a cryocooler, Y Hatsukade, T Inaba, N Kasai, Y Maruno, A Ishiyama, S Tanaka, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 412(P2), 1484 - 1490, Oct. 2004 , Refereed
    Summary:in this paper, we present our latest progress in the studies on SQUID-NDE for carbon fiber composites (CFCs), including carbon fiber reinforced plastics (CFRPs) and carbon fiber reinforced carbon matrix composites (C/Cs). We have developed a new SQUID-NDE system for the CFCs utilizing a pulse tube cryocooler for more practical and easy-handling use. Electromagnets using U-shaped ferrite cores have been introduced to the system in order to induce enough eddy current density in the relatively low-electric-conductivity CFCs. By using this system, we demonstrated the detection of deep-lying defects in thick and/or multi-layer CFCs specimens, partly including metal layer upon/below CFCs layer. CFRP plates and multi-layer C/C plates with total thickness of 20 mm having deep-lying slots at various depths were prepared. The slots at 15 mm below the surface in the CFRP plate and multi-layer C/C plate were successfully detected. Defect detections on more "real" multi-layer structures, including aluminum plates upon/below C/C plates, were also examined. (C) 2004 Elsevier B.V. All rights reserved.
  • High-T-c SQUID detection system for contaminants in food and drug, S Tanaka, N Hotta, S Kudo, S Tsuboi, Y Hatsukade, T Nagaishi, K Nishi, H Ota, S Suzuki, CHINESE JOURNAL OF PHYSICS, CHINESE JOURNAL OF PHYSICS, 42(4), 526 - 533, Aug. 2004 , Refereed
    Summary:There is a strong demand for detection of small contaminants in food and pharmaceutical medicines. High-T-c SQUID detection systems for a metallic contaminant in foodstuffs and drugs are developed for safety. We developed two systems; one large system is for meat blocks and the other small system is for powdered drugs or packaged foodstuffs. Both systems consist of SQUID magnetometers, a permanent magnet for magnetization and a belt conveyer. All the samples were magnetized before measurements and measured by high T-c SQUIDs. As a result, we successfully measured small syringe needles with length of 2 mm in a meat block and a stainless steel ball as small as 0.3 mm. in diameter.
  • Measurement of metallic contaminants in food with a high-T-c SQUID, S Tanaka, M Natsume, M Uchida, N Hotta, T Matsuda, ZA Spanut, Y Hatsukade, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 17(4), 620 - 623, Apr. 2004 , Refereed
    Summary:We have proposed and demonstrated a high-T-c SQUID system for detecting metallic contaminants in foodstuffs. There is a demand for the development of systems for detecting not only magnetic materials but also non-magnetic materials such as Cu and aluminium in foodstuffs to ensure food safety. The system consists of a SQUID magnetometer, an excitation coil and a permanent magnet. For a non-magnetic sample, an AC magnetic field is applied during detection to induce an eddy current in the sample. For a magnetizable sample, a strong magnetic field is applied to the sample prior to the detection attempt. We were able to detect a stainless steel ball with a diameter of 0.1 mm and a Cu ball less than 1 mm in diameter, for example.

Conference Activities & Talks

  • Computational Analysisi of Defect Signals of All-Round Pipe Inspection using HTS-SQUID-based Guided Wave Testing, Y. Azuma, Y. Hatsukade, International Superconductive Electronics Conference (ISEC) 2019,   2019 07 29
  • Multipoint measurements of a pipe using HTS-SQUID and Magnetostriction-based Ultrasonic Vuided Wave, Y. Azuma, Y. Yokouchi, S. Kubota, T. Terawaka, Y. Hatsukade, S. Adachi, K. Tanabe, 31th International Symposium on Superconductivity (ISS2018),   2018 12 14
  • Multipoint measurement of T (0, 1) mode guided wave using HTS-SQUID gradiometer, N. Masutani, S. Teranishi, K. Masamoto, S. Kanenega, Y. Azuma, Y. Hatsukade, S. Adachi, K. Tanabe, European Conference on Applied Superconductivity 2017 (EUCAS2017),   2017 09 18
  • Defect detection of pipes using ultrasonic guided wave and HTS-SQUID, N. Masutani, S. Teranishi, K. Masamoto, S. Kanenaga, Y. Hatsukade, 29th International Symposium on Superconductivity (ISS2016),   2016 12 15

Misc

  • Optical Evaluation of Microwave Kinetic Inductance Detectors for Fourier Transform Terahertz Spectroscopy, HATSUKADE Yoshimi, TANAKA Saburo, Abstracts of 12th European Conference on Applied Superconductivity (EUCAS2015), 224, 224,   2015 , Refereed
  • Development of Ultra-Sensitive Contaminant Detection System using High Tc SQUID, Junichi Hatta, Shingo Tsunaki, Masaaki Yamamoto, Yoshimi Hatsukade, Saburo Tanaka, Abstracts of International Workshop on Magnetic Particle Imaging (IWMPI2014), 88, 89,   2014 , Refereed
  • 2D Magnetic Nanoparticle Imaging using Second Harmonic of Magnetization Response, S. Tanaka, T. Ohtani, Y. Uchida, Y. Hatsukade, S. Suzuki, Abstracts of 4th International Conference on Superconductivity and Magnetism, 740, 740,   2014 , Refereed
  • Magnetic Nanoparticle Imaging using High-Tc SQUID, S. Tanaka, T. Ohtani, Y. Hatsukade, S. Suzuki, Abstracts of Applied Superconductivity Conference 2014 (ASC2014),, 2EOr2A-04,   2014 , Refereed
  • Metallic Contaminant Detection by SQUID, Saburo Tanaka, S.Tsunaki, M.Yamamoto, Y.Hatsukade, J.Hatta, Abstracts of International Workshop on Magnetic Particle Imaging 2013 (IWMP2013I), 1, 1,   2013 , Refereed, 10.1109/IWMPI.2013.6528386
  • Metallic Contaminant Detection by Faraday’s Law of Electromagnetic Induction using High-Tc SQUIDs, Saburo Tanaka, T. Ohtani, Y. Uchida, T. Chigasaki, Y. Hatsukade, Abstracts of 3nd Workshop on Frontier Application of Superconducting Devices, 1, 1,   2013 , Refereed
  • Metallic contaminant detection by Faraday's law of electromagnetic induction using high-Tc SQUIDs, S. Tanaka, T. Ohtani, T. Kobayashi, T. Chigasaki, Y. Hatsukade, S. Suzuki, 2013 IEEE 14th InternationalSuperconductive Electronics Conference, ISEC 2013, 284, 286,   2013 , Refereed, 10.1109/ISEC.2013.6604310
    Summary:We propose and demonstrate a high-Tc SQUID(Superconducting Quantum Interference Devises) magnetic metallic contaminant detector using Faraday's law of electromagnetic induction for food and industrial products. For manufacturers producing items such as processed food and industrial products, problems with metallic contaminants are critical issues. The lower detection limit for practical X-ray usage is on the order of 1 mm. A detection system using a SQUID is a powerful tool for sensitive inspections. An iron pellet with a size of 40 μm is successfully detected by the proposed system. © 2013 IEEE.
  • Metallic Contaminant Detection System using Multi-Channel Superconducting Quantum interference Device (SQUID), S. Tanaka, H. Murata, K.Imamura, Y. Hatsukade, Abstracts of 11th European Conference on Applied Superconductivity, 764, 764,   2013 , Refereed
  • Magnetic Nano- particle Detection using Second Harmonics of Magnetization and its Application for MPI, S. Tanaka, T. Ohtani, Y. Uchida, T. Chigasaki, Y. Hatsukade, Abstracts of Euro-Asian Symposium Trends in Magnetism (EASTMAG2013), 319, 319,   2013 , Refereed
  • Challenge to Robust HTS-SQUIDs for Use in Unshielded Environments, H.Murata, Y. Zhang, T. Oishi, Y. Hatsukade, S. Tanaka, Abstracts of East Asia Symposium on Superconductive Electronics 2013, P01,   2013 , Refereed
  • New Metallic Contaminant Detection System Based on Faraday’s Law of Electromagnetic Induction, S.Tanaka, T. Ohtani, Y. Uchida, T. Chigasaki, Y. Hatsukade, S. Suzuki, Abstracts of East Asia Symposium on Superconductive Electronics 2013, 26, 26,   2013 , Refereed, 招待有り
  • High-Tc SQUID Metallic Contaminant Detector for Li-ion Battery, S. Tanaka, Y. Kitamura, Y. Uchida, Y. Hatsukade, T. Ohtani, S. Suzuki, Abstracts of 11th International Symposium on High Temperature Superconductors in High Frequency Fields (HTSHFF2012),   2012 , Refereed
  • Metallic contaminant detection system using multi-channel high Tc SQUIDs, Saburo Tanaka, Yoshihiro Kitamura, Yoshimi Hatsukade, Takeyoshi Ohtani, Shuichi Suzuki, Abstracts of Moscow International Symposium on Magnetism (MISM-2011),, 891, 892,   2011 , Refereed, 招待有り
  • Multi-channel High-Tc SQUID Detection System for Metallic Contaminants, Y. Kitamura, R. Kurosawa, Y. Hatsukade, T. Ohtani, S. Suzuki, S. Tanaka, Abstracts of Superconductivity Centennial Conf. 2011 (SCC2011), 79, 79,   2011 , Refereed
  • Prediction of Initiation Site of Detection of Flat Braded Carbon Fiber Composites using HTS-SQUID Gradiometer, Y. Shinyama, Y. Hatsukade, S. Tanaka, Y. Takai, M. S. Aly-Hassan, A. Nakai, H. Hamada, Abstracts of Superconductivity Centennial Conf. 2011 (SCC2011), 79, 79,   2011 , Refereed
  • Magnetic Shielding simulation of superconducting film shield covering directly coupled HTS dc-SQUID magnetometer, N. Terauchi, S. Noguchi, H. Igurashi, Y. Hatsukade, S. Tanaka, Abstracts of Superconductivity Centennial Conf. 2011 (SCC2011), 78, 78,   2011 , Refereed
  • Improved Characteristics of Integrated HTS rf SQUID on Bicrystal SrTiO3 Substrate Resonator Covered with HTS Thin Fiulms in Flip-Chip Geometry, Y. Hatsukade, M. Takemoto, R. Kurosawa, S. Tanaka, Abstracts of Superconductivity Centennial Conf. 2011 (SCC2011), 78, 78,   2011 , Refereed
  • Improvement of Signal to Noise Ration of HTS-rf-SQUID for Ultra-Low Field NMR/MRI by 77K LC Resonant Circuit, D.Zhang, S.Fukumoto, S.Tsunaki, Y.Hatsukade, S.Tanaka, Abstracts of 24th International Symposium on Superconductivity (ISS2011), 269, 269,   2011 , Refereed
  • UFL-NMR/MRI System using HTS-SQUID and Permanent Magnet, S.Fukumoto, T.Chigasaki, S.Tsunaki, Y.Hatsukade, S.Tanaka, Abstracts of 24th International Symposium on Superconductivity (ISS2011), 268, 268,   2011 , Refereed
  • Numerical Simulation of SQUID Magnetometer Consideraing Josephson Junction as Equivalence Ciarcuit, N.Terauchi, S.Noguchi, H.Igarashi, Y.Hatsukade, S.Tanaka, Abstracts of 24th International Symposium on Superconductivity (ISS2011), 268, 268,   2011 , Refereed
  • Eight-Channel Metallic Contaminant Detection System using High-Tc SQUID Gradiometer, S. Tanaka, Y.Kitamura, Y. Hatsukade, T. Ohtani, Y. Ikeda, S. Suzuki, Abstracts of The 6th East Asia Symposium on Superconductor Electronics (EASSE2011), 7, 7,   2011 , Refereed
  • HTS-rf-SQUIDを用いた超低磁場MRIシステムの開発, 福元翔平, 勝行広, 鈴木美帆, 森田遼介, 長沼悠介, 廿日出好, 田中三郎, 110, SCE2010-38, 13, 16,   2011
  • High Tc SQUID Application for Detection and Imaging, Saburo Tanaka, H. Kitamura, Y. Hatsukade, T. Ohtani, S. Suzuki, Abstracts of 2nd Workshop on Frontier Application of Superconducting Sensors at SIMIT in Shanghai,   2010 , Refereed
  • Nondestructive evaluation of braided carbon fiber composites with artificial defect using HTS-SQUID gradiometer, Y. Shinyama, Y. Hatsukade, Y. Takai, M.S. Aly-Hassan, A. Nakai, H. Hamada, S. Adachi, K. Tanabe, S. Tanaka, Abstracts of 23rd International Symposium on Superconductivity (ISS2010), 298, 298,   2010 , Refereed
  • Robot-based 3D-mobile compact HTS-SQUID NDE system, Y. Hatsukade, K. Hayashi, Y. Shinyama, S. Adachi, K. Tanabe, S. Tanaka, Abstracts of 23rd International Symposium on Superconductivity (ISS2010), 142, 142,   2010 , Refereed
  • Biomagnetic measurement using three-channel high-Tc superconducting quantum interference device array system, Y. Hatsukade, S. Masaki, S. Yoshida, S. Tanaka, Abstracts of LifeChip 2009,   2009 , Refereed
  • Robot-arm-based NDE of Hydrogen Fuel Tank using a 3D-movable HTS-SQUID gradiometer, Y. Hatsukade, K. Hayashi, S. Tanaka, K. Tanabe, Abstract of 9th Europican Conference on Applied Superconductivity 2009 (EUCAS2009), 5, 5,   2009 , Refereed
  • Evaluation of joint interface of friction stir welding between dissimilar metals using HTS-SQUID gradiometer, Y. Mashiko, Y. Hatsukade, T. Yasui, H. Takenaka, Y. Todaka, M. Fukumoto, S. Tanaka, Abstract of 22st International Symposium on Superconductivity (ISS2009)PROGRAM & ABSTRACTS, 277, 277,   2009 , Refereed
  • SQUID application for Magnetic Contaminant Detection, S. Tanaka, T. Akai, Y. Hatsukade, T. Ohtani, Y. Ikeda, S. Suzuki, Abstract of 22st International Symposium on Superconductivity (ISS2009), PROGRAM & ABSTRACTS, 142, 142,   2009 , Refereed
  • High-Tc SQUID Application for Low Field NMR, Saburo Tanaka, Yoshimi Hatsukade, Shinya Okuno, Masahiro Hayashi, Book of Abstracts 16th Int. Conf. on Biomagnetism (BIOMAG 2008), 231, 231,   2008 , Refereed
  • Detection OF wire element breakage in power transmission line using HTS SQUID, A. Miyazaki, Y. Hatsukade, H. Matsuura, T. Maeda, A. Suzuki, S. Tanaka, Abstract of 21st International Symposium on Superconductivity (ISS2008), PROGRAM & ABSTRACTS, 318, 318,   2008 , Refereed
  • Metallic Contaminant Detection System using Superconducting Magnetic Sensor for Food and Beverage, Saburo Tanaka, Y.Hatsukade, T.Nagaishi, S. Suzuki, Abstract of The Third International Forum on Food Safety, 46, 46,   2007 , Refereed
  • Study on Inspection of Wire Brakage in Aluminum Transmission Line using SQUID, Y.Hatsukade, Saburo Tanaka, Abstract of The 2nd international Conference on Advanced Nondestructive Evaluation 2007 (ANDE2007), 7, 7,   2007 , Refereed
  • Metallic Contaminant Detection System for industrial products by High Tc SQUID Magnetic Sensor, Saburo Tanaka, H.Fujita, Y.Hatsukade, T.Otani, S.Suzuki, Abstract of The 2nd international Conference on Advanced Nondestructive Evaluation 2007 (ANDE2007), 68, 68,   2007 , Refereed
  • Development of SQUID-Based low field NMR system, Shinya Okuno, Masahiro Hayashi, Yoshimi Hatsukade, Saburo Tanaka, Abstract of 20th International Symposium on Superconductivity (ISS2007), 320, 320,   2007 , Refereed
  • High Tc SQUID Micro-detector for Metallic Contaminant, Saburo Tanaka, Yoshimi Hatsukade, Tatsuoki Nagaishi, Shuichi Suzuki, Abstract of The 13th Japan-US Workshop on Advanced Superconductors, 58, 59,   2007 , Refereed
  • Detection of Small Partidles in Industrial Products by a SQUID Magnetometer, Saburo Tanaka, Yoshimi Hatsukade, Tatsuoki Nagaishi, Shuichi Suzuki, Abstract of East Asia Symposium on Superconductor Electronics (EASSE2007), 23, 23,   2007 , Refereed
  • High Sensitive SQUID Detection System for Metallic Contaminant in Food and Beverage, S.Tanaka, H. Fujita, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, T. Otani, S. Suzuki, Abstract of 2006 Taiwan International Conerence on Superconductivity & The 8th Workshop on Low Temperature Physics, 78, 78,   2006 , Refereed
  • Metallic Contaminants detection System for Foods and Beverages by High Tc SQUID Magnetic Sensor, S.Tanaka, H. Fujita, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, T. Otani, S. Suzuki, Abstract of International Conference on Electrical Engineering 2006, 1?5 (SM1-01 pdf. file in CD ISBN -89-86510-05-7-98560),   2006 , Refereed
  • High Tc SQUIDs System Detection of Magnetic Contaminants in Food and Beverage, S.Tanaka, H. Fujita, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, T. Otani, S. Suzuki, Abstracts of 365. WE-Heraeus-Seminar (Challenges of Applied Cryoelectrics), 32, 32,   2006 , Refereed
  • Stabilized Pulse Tube Cryocooler system with infrared lamp heater for SQUID magnetic sensor, S. Tanaka, S. Iwao, Y. Hatsukade, Abstracts of The International Conference on Electrical Engineerng 2005 (ICEE 2005), 20, 20,   2005 , Refereed
  • High Tc SQUIDs Base Technology for Detection of Food Contaminants, Saburo Tanaka, H. Fujita, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, T. Otani, S. Suzuki, Abstracts of The Korean Superconductivity Society Meeting 2005 (KSS2005), 7, 7,   2005 , Refereed, 招待有り
  • Properties of Nano-particles for Bio Application with SQUID, Saburo Tanaka, Hirofumi Kurita, Chika Toriyabe, Yoshimi Hatsukade, Shinji Katsura, Oleg Snigirev, Sergey P. Gubin, Abstract of International Workshop on Bio-magnetism & Taiwan-Japan Symposium on Superconductive Electronics 2005, 64, 64,   2005 , Refereed
  • Inspection of Thin Copper Heat Exchanger Tubes using SQUID-NDE System, Yoshimi Hatsukade, Akifumi Kosugi, Shinya Okuno, Saburo Tanaka, The 1st International Conference on Advanced Nonestructive Evaluation, 12, 12,   2005 , Refereed
  • Detection of micro flaws on thin copper tubes using SQUID-NDI system based on eddy current technique, Y. Hatsukade, A. Kosugi, K. Mori, S. Tanaka, Abstract of 17th International Symposium on Superconductivity (ISS2004), 157, 157,   2004 , Refereed
  • Pulse tube cryocooler SQUID cooling system involving an infrared temperature controller cooled by a cryocooler, S. Tanaka, S. Iwao, Y. Hatsukade, Abstract of 17th International Symposium on Superconductivity (ISS2004), 162, 162,   2004 , Refereed
  • High-Tc SQUID Detection System for Contaminants in Food and Drug, S. Tanaka, N. Hotta, Y. Hatsukade, T. Nagaishi, K. Nishi, H. Ota, S. Suzuki, Abstract of Second East Asia Symposium on Superconductive Electronics (EASSE 2003), 49, 49,   2003 , Refereed
  • Photocurrent in superconducting YBa2Cu3O7-x films induced by an infrared free electron laser, K. Nishi, Y. Hatsukade, S. Tanaka, K. Awazu, H. Horiike, INFRARED PHYSICS & TECHNOLOGY, 51, 5, 463, 467,   2008 05 , 10.1016/j.infrared.2007.12.019, https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=42649122317&origin=inward
    Summary:Since the discovery of high-temperature cuprate superconductors, there has been much intensive study about the mechanism of them. However, identifying the dynamical mechanism behind them remains one of the great challenges in condensed matter physics. We investigated the high-temperature YBa2Cu3O7-x superconducting films by using a free electron laser (FEL). The method is a type of photoelectron spectroscopy called a free electron laser internal photoemission. The spectrum of the photocurrent induced by FEL was measured in the case of 15 K and 100 K. We estimated the superconductive gap energy of YBa2Cu3O7-x by comparing the photocurrent spectrum of the superconductive state with that of non-superconductive state. (C) 2007 Elsevier B.V. All rights reserved.

Awards & Honors

  •   2009 06 , ISEC2009 Committee, Young Researcher Award, Study of Robustness of HTS-SQUID Magnetometer Covered by Superconducting Shield in AC Magnetic Field
  •   2005 09 , EUCAS 2005 Committee, Best Scientific Contribution Award, SQUID NDE for In-situ Inspection of Copper Heat Exchanger Tubes