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Satoshi Ito

Section

Graduate School of Engineering

Job title

Associate Professor

Degree

博士（工学）（東北大学）
修士（工学）（東北大学）

researchmap

https://researchmap.jp/read0209398

J-GLOBAL ID

200901035690799355

Research History 4

2015/04 - Present

Gradate School of Engineering, Tohoku University　Associate Professor
2007/04 - 2015/03

Gradate School of Engineering, Tohoku University　Assistant Professor
2011/03 - 2011/05

Plasma Science and Fusion Center, Massachusetts Institute of Technology　Visiting Scientist
2005/10 - 2007/03

Graduate School of Engineering, Tohoku University　Research Associate

Education 2

Tohoku University　Graduate School, Division of Engineering　Department of Quantum Science and Energy Engineering

- 2005/09
Tohoku University　Faculty of Engineering　Department of Quantum Science and Energy Engineering

- 2001/03

Committee Memberships 23

IEEE　Technical Editor of IEEE Transactions on Applied Superconductivity (Special Issue of MT29)

2025/08 - Present
核融合科学研究所　超伝導・低温工学ユニットユニット研究戦略会議構成員

2025/04 - Present
プラズマ・核融合学会　編集委員会委員

2024/07 - Present
低温工学・超電導学会東北・北海道支部　庶務幹事

2024/04 - Present
量子科学技術研究開発機構　原型炉設計・工学R＆D専門部会専門委員

2022/04 - Present
Technical Editor of IEEE Transactions on Applied Superconductivity (Special Issue of ASC 2024)

2024/10 - 2025/04
低温工学・超電導学会　発表賞推薦委員会・委員

2021/04 - 2025/03
日本原子力学会核融合工学部会　枠組み編成WG メンバー

2022/12 - 2024/07
日本原子力学会核融合工学部会　プログラム編成WG メンバー

2021/04 - 2024/07
低温工学・超電導学会東北・北海道支部　会計幹事

2022/04 - 2024/04
IEEE　Technical Editor of IEEE Transactions on Applied Superconductivity (Special Issue of EUCAS 2023)

2023/10 - 2024/03
IEEE　Technical Editor of IEEE Transactions on Applied Superconductivity (Special Issue of ASC 2022)

2022/11 - 2023/04
日本伝熱学会東北支部　幹事（宮城地区）

2021/04 - 2023/03
日本原子力学会核融合工学部会　運営委員庶務担当

2021/04 - 2023/03
IEEE　Technical Editor of IEEE Transactions on Applied Superconductivity (Special Issue of MT27)

2021/12 - 2022/07
低温工学・超電導学会東北・北海道支部　会計委員

2020/04 - 2022/03
低温工学・超電導学会東北・北海道支部　企画幹事

2017/04 - 2022/03
日本原子力学会核融合工学部会　運営委員国際学術担当

2019/04 - 2021/03
日本原子力学会核融合工学部会　プログラム編成WG メンバー

2010/12 - 2013/11
日本伝熱学会東北支部　幹事（評議員）

2011/04 - 2013/03
日本原子力学会　核融合工学部会運営委員庶務担当

2010/04 - 2012/03
日本伝熱学会東北支部　幹事（宮城地区）

2009/04 - 2011/03
日本伝熱学会「キッズ・エネルギー・シンポジウム2010」実行委員会　委員

2009/10 - 2010/11

Show all ︎Show first 5

Professional Memberships 6

The Japan Society of Applied Electromagnetics and Mechanics
Japan Society of Mentenology
The Heat Transfer Society of Japan
プラズマ・核融合学会
Cryogenics and Superconductivity Society of Japan
Atomic Energy Society of Japan

︎Show all ︎Show first 5

Research Interests 5

Liquid metal blanket and divertor
Heat transfer enhancement of liquid nitrogen
Mechanical Joint of HTS cable
Remountable HTS Fusion Magnet
Fusion reactor engineering

Research Areas 3

Energy / Nuclear engineering /
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Thermal engineering /
Energy / Nuclear fusion /

Awards 6

Overview Article Award

2020/05　Cryogenic and Superconductivity Society of Japan　Development of Large-Current High-Temperature Superconductors for Fusion Reactor Magnets
日本原子力学会第12回核融合工学部会賞奨励賞

2015/09/10　日本原子力学会　分割型高温超伝導マグネットのための接合部構造・冷却設計および大型高温超伝導導体の機械的接合法の開発
Russell B. Scott Memorial Award

2015/06/30　Cryogenic Engineering Conference 2013　Best Research Paper
プラズマ・核融合学会技術進歩賞

2014/11/18　一般社団法人プラズマ・核融合学会　核融合炉マグネットへの適用を目指した100kA級高温超伝導導体と機械的低抵抗ジョイントの開発
低温工学・超電導学会 2010年度優良発表賞

2010/05/13　社団法人低温工学協会　2009年度秋季低温工学・超電導学会の優れた発表に対する表彰
量子エネルギー工学専攻賞

2003/03/25　東北大学　修士課程における学業成果・研究成果に対する表彰

Show all ︎Show 5

Papers 118

Individual Evaluation of REBCO/Ag and Ag/Cu Interfacial Resistivities inside Copper-stabilized REBCO Tapes Peer-reviewed

Koichi Sato, Satoshi Ito, Yosuke Atake, Yuji Tsuchiya, Kohki Takahashi, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　35　(5)　6601005　2025/08
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2024.3512534 　

ISSN： 1051-8223

eISSN： 1558-2515 2378-7074
Press-Welding Between High-Temperature Superconducting Tape Conductors With Low-Temperature Solders Including Indium Peer-reviewed

Satoshi Ito, Reo Tamura, Haruumi Yamamoto, Taiki Onji, Masaru Tomita

IEEE Transactions on Applied Superconductivity　35　(5)　4800305　2025/08
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2024.3512512 　

ISSN： 1051-8223

eISSN： 1558-2515 2378-7074
Quench Detection in Insulated, NI, and MI (RE)Ba₂Cu₃O_7– _x Coils With Superconducting Quench Detectors Peer-reviewed

Shin Hasegawa, Satoshi Ito, Gen Nishijima, Satoshi Awaji, Kohki Takahashi, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　34　(6)　3801110　2024/09
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2024.3404812 　

ISSN： 1051-8223

eISSN： 1558-2515 2378-7074
Bending and Twisting Characteristics of REBCO Lap Joint With Indium Peer-reviewed

Qifan Zhang, Satoshi Ito, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　33　(5)　4201305　2023/08
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2023.3261841 　

ISSN： 1051-8223

eISSN： 1558-2515 2378-7074
Initial Study on Press Welding With Indium Applied to High-Temperature Superconducting DC Feeder Cables Peer-reviewed

Satoshi Ito, Luis Ernesto Aparicio, Yosuke Atake, Haruumi Yamamoto, Taiki Onji, Masaru Tomita

IEEE Transactions on Applied Superconductivity　33　(5)　4800405　2023/08
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2023.3237791 　

ISSN： 1051-8223

eISSN： 1558-2515 2378-7074
Evaluation of the Interface Resistance on Heated REBCO Tape Peer-reviewed

Yosuke Atake, Satoshi Ito, Kohki Takahashi, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　33　(5)　6600604　2023/08

DOI： 10.1109/TASC.2023.3240387 　
Mechanism of Recovery Performance Improvement With Porous-Stabilized REBCO Tape for Resistive-Type Superconducting Fault Current Limiters Peer-reviewed

Kohei Yuki, Satoshi Ito, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　33　(5)　5600606　2023/08

DOI： 10.1109/TASC.2023.3256347 　
Stable operation characteristics and perspectives of the large-current HTS STARS conductor Peer-reviewed

N Yanagi, Y Narushima, Y Onodera, D Garfias-Dávalos, S Ito, Y Terazaki, S Hamaguchi, H Chikaraishi, S Takada, N Hirano, K Takahata

Journal of Physics: Conference Series　2545　(1)　012008-012008　2023/07/01
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/2545/1/012008 　

ISSN： 1742-6588

eISSN： 1742-6596

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Abstract The High-Temperature Superconducting (HTS) magnet option has been explored for fusion reactors as well as for next-generation fusion experimental devices. The Stacked Tapes Assembled in Rigid Structure (STARS) conductor uses HTS tapes with simple stacking without twisting and transposition. A practically applicable STARS conductor is presently being developed with an operating current of 18 kA at 20 K temperature and ~15 T magnetic field. The conductor is required to have a high current density of 80 A/mm². For the second stage of the conductor development, internal electrical insulation is applied between the copper stabilizer casing and the outer stainless-steel jacket, and a 6-m conductor sample was fabricated in a solenoid coil shape with a 600-mm diameter and three turns. The coiled sample was tested in 8 T, 20 K using a facility equipped with a maximum 13-T, 700-mm bore solenoid coil. Excitation up to the rated current of 18 kA was successfully attained with stable operation. The characteristics of the conductor observed during the excitation test are discussed.
Evaluation of Magnetic Field Dependence of the Interface Resistivity in REBCO Tape Peer-reviewed

Yosuke Atake, Satoshi Ito, Kohki Takahashi, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　32　(6)　4803205　2022/09
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2022.3186268 　

ISSN： 1051-8223

eISSN： 1558-2515 2378-7074
Impact of Current Transfer to Porous Stabilizer on Recovery Performance of Resistive-Type Superconducting Fault Current Limiters Using REBCO Tapes Peer-reviewed

Kohei Yuki, Satoshi Ito, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　32　(4)　5600207　2022/06
Progress of HTS STARS Conductor Development for the Next-Generation Helical Fusion Experimental Device Peer-reviewed

N. Yanagi, Y. Terazaki, Y. Narushima, Y. Onodera, N. Hirano, S. Hamaguchi, H. Chikaraishi, S. Takada, S. Ito, K. Takahata

Plasma and Fusion Reserch　17　2405076　2022

DOI： 10.1585/pfr.17.2405076 　

eISSN： 1880-6821
Low-resistance joint development for segment-fabrication of high-temperature superconducting fusion magnets Peer-reviewed

S. Ito, H. Tamura, N. Yanagi, H. Hashizume

Nuclear Fusion　61　(11)　115002　2021/10

DOI： 10.1088/1741-4326/ac269e 　
Effect of Electrical and Thermal Properties of Porous-Stabilized REBCO Tape on Recovery Performance Peer-reviewed

Kohei Yuki, Satoshi Ito, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　31　(5)　4600906　2021/08

DOI： 10.1109/tasc.2021.3058567 　

ISSN： 1051-8223

eISSN： 2378-7074
Quench Detection Performance of Low-Temperature Superconducting Quench Detectors for REBCO Tape in Magnetic Fields Peer-reviewed

Shin Hasegawa, Satoshi Ito, Gen Nishijima, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　31　(5)　4701605　2021/08
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tasc.2021.3063645 　

ISSN： 1051-8223

eISSN： 2378-7074
Investigation of the crystallization process of CSD-ErBCO on IBAD-substrate via DSD approach Peer-reviewed

R. Hayasaka, P. Cayado, M. Erbe, W. Freitag, J. Hänisch, B. Holzapfel, S. Ito, H. Hashizume

Scientific Reports　10　(1)　19934　2020/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-020-76848-y 　

eISSN： 2045-2322

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<title>Abstract</title><italic>RE</italic>Ba₂Cu₃O_7-δ (<italic>RE</italic>BCO, <italic>RE</italic>: rare earth, such as Y and Gd) compounds have been extensively studied as a superconducting layer in coated conductors. Although ErBCO potentially has better superconducting properties than YBCO and GdBCO, little research has been made on it, especially in chemical solution deposition (CSD). In this work, ErBCO films were deposited on IBAD (ion-beam-assisted-deposition) substrates by CSD with low-fluorine solutions. The crystallization process was optimized to achieve the highest self-field critical current density (<italic>J</italic>_c) at 77 K. Commonly, for the investigation of a CSD process involving numerous process factors, one factor is changed keeping the others constant, requiring much time and cost. For more efficient investigation, this study adopted a novel design-of-experiment technique, definitive screening design (DSD), for the first time in CSD process. Two different types of solutions containing Er-propionate or Er-acetate were used to make two types of samples, Er-P and Er-A, respectively. Within the investigated range, we found that crystallization temperature, dew point, and oxygen partial pressure play a key role in Er-P, while the former two factors are significant for Er-A. DSD revealed these significant factors among six process factors with only 14 trials. Moreover, the DSD approach allowed us to create models that predict <italic>J</italic>_c accurately. These models revealed the optimum conditions giving the highest <italic>J</italic>_c values of 3.6 MA/cm² for Er-P and 3.0 MA/cm² for Er-A. These results indicate that DSD is an attractive approach to optimize CSD process.
In-depth resistance analysis of REBCO tape joints with indium insert and solders International-journal Peer-reviewed

R Hayasaka, S Ito, T Kato, D Yokoe, H Hashizume

Journal of Physics: Conference Series　1559　(1)　012034　2020/06
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/1559/1/012034 　

ISSN： 1742-6588

eISSN： 1742-6596
Effect of non-uniform proton irradiation on the critical current of REBCO tapes International-journal Peer-reviewed

H Yamamoto, S Ito, M Miwa, S Matsuyama, H Hashizume

Journal of Physics: Conference Series　1559　(1)　012045　2020/06
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/1559/1/012045 　

ISSN： 1742-6588

eISSN： 1742-6596
Joining condition dependency of joint resistance in ultrasonic welding of high-temperature superconducting tapes with indium International-journal Peer-reviewed

S Ito, R Hayasaka, K Yuki, Y S Sato, H Hashizume

Journal of Physics: Conference Series　1559　(1)　012065　2020/06
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/1559/1/012065 　

ISSN： 1742-6588

eISSN： 1742-6596
Investigation of trade-off solution in mechanical edge joint of STARS conductors International-journal Peer-reviewed

S Sato, S Ito, H Hashizume

Journal of Physics: Conference Series　1559　(1)　012110　2020/06
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/1559/1/012110 　

ISSN： 1742-6588

eISSN： 1742-6596
Investigation for contact interface of mechanical lap joint fabricated with high-temperature superconducting conductor using X-ray microtomograph International-journal Peer-reviewed

Weixi Chen, Satoshi Ito, Noritaka Yusa, Hidetoshi Hashizume

Plasma and Fusion Research　15　(0)　2405014　2020/03
Publisher: Japan Society of Plasma Science and Nuclear Fusion Research
DOI： 10.1585/pfr.15.2405014 　

eISSN： 1880-6821
Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters International-journal Peer-reviewed

Kohei Yuki, Satoshi Ito, Hidetoshi Hashizume

Superconductor Science and Technology　33　(3)　034002　2020/03/01
Publisher: IOP Publishing
DOI： 10.1088/1361-6668/ab669a 　

ISSN： 0953-2048

eISSN： 1361-6668
Quantitative evaluation of delamination length in mechanical lap joint of high temperature superconducting tapes using Lamb waves International-journal International-coauthorship Peer-reviewed

Bo Feng, Weixi Chen, Satoshi Ito, Noritaka Yusa, Hidetoshi Hashizume, Artur L Ribeiro, Helena G Ramos

Measurement　156　107606-107606　2020/01
Publisher: Elsevier BV
DOI： 10.1016/j.measurement.2020.107606 　

ISSN： 0263-2241
Investigation of the correlation between the electrical contact resistance and the contact area of mechanical lap joint fabricated with high-temperature superconducting tapes using X-ray microtomography Peer-reviewed

Weixi Chen, Satoshi Ito, Noritaka Yusa, Hidetoshi Hashizume

Fusion Engineering and Design　148　111284　2019/11

DOI： 10.1016/j.fusengdes.2019.111284 　
Heat transfer enhancement in a MHD free-surface flow by controlling the electromagnetic force with a fin structure Peer-reviewed

M. Kawamoto, K. Muraoka, S. Ito, H. Hashizume

Fusion Engineering and Design　146　(B)　2671-2675　2019/09

DOI： 10.1016/j.fusengdes.2019.04.079 　
Effect of coil configuration parameters on the mechanical behavior of the superconducting magnet system in the helical fusion reactor FFHR Peer-reviewed

H. Tamura, T. Goto, N. Yanagi, J. Miyazawa, T. Tanaka, A. Sagara, S. Ito, H. Hashizume

Fusion Engineering and Design　146　(A)　586-589　2019/09

DOI： 10.1016/j.fusengdes.2019.01.029 　
Bridge-type mechanical lap joint of HTS STARS conductors using an integrated joint piece Peer-reviewed

S. Ito, H. Hashizume, N. Yanagi, H. Tamura

Fusion Engineering and Design　146　(A)　590-593　2019/09

DOI： 10.1016/j.fusengdes.2019.01.030 　
Fundamental Evaluations of Applicability of LTS Quench Detectors to REBCO Pancake Coil Peer-reviewed

S. Hasegawa, S. Ito, G. Nishijima, H. Hashizume

IEEE Transactions on Applied Superconductivity　29　(5)　9001305　2019/08
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/TASC.2019.2900633 　

ISSN： 1051-8223

eISSN： 2378-7074
Evaluation of Interface Resistance in a REBCO Tape at Different Temperatures by Contact-probing Current Transfer Length Method Peer-reviewed

R. Hayasaka, S. Ito, H. Hashizume

IEEE Transactions on Applied Superconductivity　29　(5)　9000805　2019/08

DOI： 10.1109/TASC.2019.2895603 　
Comparison of heat assisted lap joints of high-temperature superconducting tapes with inserted indium foils Peer-reviewed

S. Ito, H. T. Fujii, R. Hayasaka, Y. S. Sato, H. Hashizume

IEEE Transactions on Applied Superconductivity　29　(5)　6600405　2019/08

DOI： 10.1109/TASC.2019.2892050 　
Mechanical Design Concept of Superconducting Magnet System for Helical Fusion Reactor, Fusion Science and Technology Peer-reviewed

H. Tamura, N. Yanagi, T. Goto, J. Miyazawa, T. Tanaka, A. Sagara, S. Ito, H. Hashizume

Fusion Science and Technology　75　(5)　384-390　2019/04

DOI： 10.1080/15361055.2019.1603041 　
Progress in the Conceptual Design of the Helical Fusion Reactor FFHR-d1 Peer-reviewed

N. Yanagi, T. Goto, J. Miyazawa, H. Tamura, Y. Terazaki, S. Ito, T. Tanaka, H. Hashizume, A. Sagara

Journal of Fusion Energy　38　(1)　147-161　2019/02

DOI： 10.1007/s10894-018-0193-y 　
Development of electromagnetic nondestructive testing for inspecting mechanical lap joint of higherature superconducting tapes

Weixi Chen, Noritaka Yusa, Satoshi Ito, Hidetoshi Hashizume

Proceedings of 2017 IEEE Far East NDT New Technology and Application Forum, FENDT 2017　202-206　2018/12/20
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/FENDT.2017.8584577 　
Advanced high-temperature superconducting magnet for fusion reactors: Segment fabrication and joint technique Peer-reviewed

S. Ito, H. Hashizume, N. Yanagi, T. Tamura

Fusion Engineering and Design　136　(A)　239-246　2018/11

DOI： 10.1016/j.fusengdes.2018.01.072 　
Numerical and Experimental Evaluations of the Quench Detection Performance of an YBCO/Nb-Tid Tape Peer-reviewed

Shin Hasegawa, Satoshi Ito, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　28　(3)　4700605　2018/04/01
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/TASC.2018.2795552 　

ISSN： 1051-8223
Development of remountable joints and heat removable techniques for high-Temperature superconducting magnets Peer-reviewed

H. Hashizume, S. Ito, N. Yanagi, H. Tamura, A. Sagara

Nuclear Fusion　58　(2)　026014　2018/02/01
Publisher: Institute of Physics Publishing
DOI： 10.1088/1741-4326/aa874f 　

ISSN： 1741-4326 0029-5515
Comparison of shear strength and failure mechanisms of lap joint between REBCO tapes bonded by different joining techniques Peer-reviewed

Luis Ernesto Aparicio, Satoshi Ito, Hidetoshi Hashizume

Fusion Engineering and Design　136　(B)　1196-1201　2018
Publisher: Elsevier Ltd
DOI： 10.1016/j.fusengdes.2018.04.101 　

ISSN： 0920-3796
Proposal of fluid stirring by multi-layered trenches for liquid metal divertor Peer-reviewed

Makoto Kawamoto, Kenta Muraoka, Satoshi Ito, Hidetoshi Hashizume

Fusion Engineering and Design　136　(A)　415-419　2018
Publisher: Elsevier Ltd
DOI： 10.1016/j.fusengdes.2018.02.065 　

ISSN： 0920-3796
Design modification of structural components for the helical fusion reactor FFHR-d1 with challenging options Peer-reviewed

Hitoshi Tamura, Nagato Yanagi, Takuya Goto, Junichi Miyazawa, Teruya Tanaka, Akio Sagara, Satoshi Ito, Hidetoshi Hashizume

Fusion Engineering and Design　124　605-609　2017/11/01
Publisher: Elsevier Ltd
DOI： 10.1016/j.fusengdes.2017.03.031 　

ISSN： 0920-3796
Current-carrying capability of the 100 kA-class HTS STARS conductor for the helical fusion reactor FFHR-d1 Peer-reviewed

Y. Terazaki, N. Yanagi, S. Ito, S. Hamaguchi, H. Tamura, T. Mito, H. Hashizume, A. Sagara

Journal of Physics: Conference Series　871　(1)　012099　2017/07/26

DOI： 10.1088/1742-6596/871/1/012099 　

ISSN： 1742-6588

eISSN： 1742-6596
Heating and Loading Process Improvement for Indium Inserted Mechanical Lap Joint of REBCO Tapes Peer-reviewed

Tatsuki Nishio, Satoshi Ito, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　27　(4)　4603305　2017/06

DOI： 10.1109/TASC.2017.2672691 　

ISSN： 1051-8223

eISSN： 1558-2515
Bending Characteristic of a Bridge-Type Mechanical Lap Joint of REBCO Tapes Peer-reviewed

Satoshi Ito, Tatsuki Nishio, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　27　(4)　4600105　2017/06

DOI： 10.1109/TASC.2016.2625748 　

ISSN： 1051-8223

eISSN： 1558-2515
Evaluation of Interface and Cohesion Shear Strength of Mechanical Lap-Joint Between HTS Coated Conductors Intended for Segmented HTS Magnet Peer-reviewed

Luis E. F. Aparicio, Satoshi Ito, Hidetoshi Hashizume

FUSION SCIENCE AND TECHNOLOGY　72　(4)　789-795　2017

DOI： 10.1080/15361055.2017.1350522 　

ISSN： 1536-1055

eISSN： 1943-7641
Magnet design with 100-kA HTS STARS conductors for the helical fusion reactor Peer-reviewed

N. Yanagi, Y. Terazaki, S. Ito, H. Tamura, S. Hamaguchi, T. Mito, H. Hashizume, A. Sagara

CRYOGENICS　80　(2)　243-249　2016/12

DOI： 10.1016/j.cryogenics.2016.06.011 　

ISSN： 0011-2275

eISSN： 1879-2235
Research and development of segmented high-temperature superconducting magnets intended for realizing innovative fusion reactors: Progress in development of remountable joints of high-temperature superconducting conductors Invited Peer-reviewed

ITO Satoshi, HASHIZUME Hidetoshi, YUSA Noritaka, YANAGI Nagato, TAMURA Hitoshi, SAGARA Akio

Journal of Plasma and Fusion Research　92　(8)　623-634　2016/08
Publisher:
ISSN： 0918-7928

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Accepted for Publication
Reducing Joint Resistance by Heat Treatment During Fabrication of a Mechanical Joint of High-Temperature Superconducting Conductors Peer-reviewed

Tatsuki Nishio, Satoshi Ito, Noritaka Yusa, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　26　(4)　4800505　2016/06

DOI： 10.1109/TASC.2016.2521891 　

ISSN： 1051-8223

eISSN： 1558-2515
Structure and Magnetic Field Dependences of Joint Resistance in a Mechanical Joint of REBCO Tapes Peer-reviewed

Satoshi Ito, Yutaro Seino, Tatsuki Nishio, Hidetoshi Oguro, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　26　(4)　4800505　2016/06

DOI： 10.1109/TASC.2016.2539210 　

ISSN： 1051-8223

eISSN： 1558-2515
Multiscale Stress Analysis and 3D Fitting Structure of Superconducting Coils for the Helical Fusion Reactor Peer-reviewed

Hitoshi Tamura, Nagato Yanagi, Kazuya Takahata, Akio Sagara, Satoshi Ito, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　26　(3)　4202405　2016/04

DOI： 10.1109/TASC.2016.2531008 　

ISSN： 1051-8223

eISSN： 1558-2515
Mechanical and Electrical Characteristics of a Bridge-Type Mechanical Lap Joint of HTS STARS Conductors Invited Peer-reviewed

Satoshi Ito, Noritaka Yusa, Nagato Yanagi, Hitoshi Tamura, Akio Sagara, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　26　(2)　4201510　2016/03

DOI： 10.1109/TASC.2016.2517197 　

ISSN： 1051-8223

eISSN： 1558-2515
Evaluation of shear strength in soldered and mechanical lap joints of high-temperature superconducting tapes intended for a remountable magnet Peer-reviewed

Luis Aparicio, Satoshi Ito, Hidetoshi Hashizume

Plasma and Fusion Research　11　(1)　2405065　2016
Publisher: Japan Society of Plasma Science and Nuclear Fusion Research
DOI： 10.1585/pfr.11.2405065 　

ISSN： 1880-6821
Design status of the structural components of the helical fusion reactor FFHR-d1 Peer-reviewed

Hitoshi Tamura, FFHR Design Group, Teruya Tanaka, Takuya Goto, Nagato Yanagi, Junichi Miyazawa, Suguru Masuzaki, Ryuichi Sakamoto, Akio Sagara, Satoshi Ito, Hidetoshi Hashizume

Plasma and Fusion Research　11　(1)　2405061　2016
Publisher: Japan Society of Plasma Science and Nuclear Fusion Research
DOI： 10.1585/pfr.11.2405061 　

ISSN： 1880-6821
Improving the joint resistance by heat treatment during fabrication of mechanical joint of high-temperature superconducting conductors Peer-reviewed

T. Nishio, S. Ito, N. Yusa, H. Hashizume

International Conference on Magnet Technology 24 (MT-24), Seoul, Korea　2015/10/18
Proposal of a prediction method for forced convection and nucleate boiling heat transfer characteristics in a cryogenic cooling system using the metal-particle sintered porous medium Peer-reviewed

S. Sasaki, S. Ito, H. Hashizume

nternational Workshop on Cooling-system for HTS Applications 2015 (IWC-HTS 2015), Matsue, Japan　2015/10/14
Novel divertor design to mitigate neutron irradiation in the helical reactor FFHR-d1 Peer-reviewed

Hitoshi Tamura, Teruya Tanaka, Takuya Goto, Junich Miyazawa, Suguru Masuzaki, Tsuguhiro Watanabe, Nagato Yanagi, Akio Sagara, Satoshi Ito, Hidetoshi Hashizume

FUSION ENGINEERING AND DESIGN　98-99　1629-1633　2015/10

DOI： 10.1016/j.fusengdes.2015.01.025 　

ISSN： 0920-3796

eISSN： 1873-7196
Impedance measurement for predicting joint resistance of a mechanical lap joint in a high-temperature superconductor Peer-reviewed

W. Chen, S. Ito, N. Yusa, H. Hashizume

The 20th International Workshop on Electromagnetic Nondestructive Evaluation, Sendai, Japan　2015/09/21
STEADY AND TRANSIENT THERMAL ANALYSES ON A SEGMENTED HIGH-TEMPERATURE SUPERCONDUCTING MAGNET WITH POROUS MEDIA-INSERTED CRYOGENIC COOLING Peer-reviewed

Satoshi Ito, Hidetoshi Hashizume

FUSION SCIENCE AND TECHNOLOGY　68　(2)　428-432　2015/09

DOI： 10.13182/FST15-104 　

ISSN： 1536-1055

eISSN： 1943-7641
Fundamental Investigation on Tensile Characteristics of a Mechanical Lap Joint of REBCO Tapes Peer-reviewed

Satoshi Ito, Hidetoshi Oguro, Hitoshi Tamura, Nagato Yanagi, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　25　(3)　4201205　2015/06

DOI： 10.1109/TASC.2014.2369058 　

ISSN： 1051-8223

eISSN： 1558-2515
Investigation of Influences of Film Resistance and Magnetic Field on Contact Resistance in a Mechanical Lap Joint of GdBCO Tapes Peer-reviewed

Yutaro Seino, Satoshi Ito, Hidetoshi Oguro, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　25　(3)　6603405　2015/06

DOI： 10.1109/TASC.2014.2376771 　

ISSN： 1051-8223

eISSN： 1558-2515
Measurement and Analysis of Critical Current of 100-kA Class Simply-Stacked HTS Conductors Peer-reviewed

Y. Terazaki, N. Yanagi, S. Ito, Y. Seino, S. Hamaguchi, H. Tamura, T. Mito, H. Hashizume, A. Sagara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　25　(3)　4602905　2015/06

DOI： 10.1109/TASC.2014.2377793 　

ISSN： 1051-8223

eISSN： 1558-2515
Design and development of high-temperature superconducting magnet system with joint-winding for the helical fusion reactor Peer-reviewed

N. Yanagi, S. Ito, Y. Terazaki, Y. Seino, S. Hamaguchi, H. Tamura, J. Miyazawa, T. Mito, H. Hashizume, A. Sagara

NUCLEAR FUSION　55　(5)　053021　2015/05

DOI： 10.1088/0029-5515/55/5/053021 　

ISSN： 0029-5515

eISSN： 1741-4326
Boiling Heat Transfer Characteristics of a Cryogenic Coolant with Metal Porous Media and Thermal Analysis on a Segmented High-Temperature Superconducting Magnet Peer-reviewed

S. Ito, H. Hashizume

21st Topical Meeting on the Technology of Fusion Energy　2014/11/09
Design prospect of remountable high-temperature superconducting magnet Peer-reviewed

Hidetoshi Hashizume, Satoshi Ito

FUSION ENGINEERING AND DESIGN　89　(9-10)　2241-2245　2014/10

DOI： 10.1016/j.fusengdes.2013.12.014 　

ISSN： 0920-3796

eISSN： 1873-7196
Numerical study of the MHD flow characteristics in a three-surface-multi-layered channel with different inlet conditions Peer-reviewed

Mitsuhiro Aoyagi, Satoshi Ito, Hidetoshi Hashizume

FUSION ENGINEERING AND DESIGN　89　(7-8)　1227-1231　2014/10

DOI： 10.1016/j.fusengdes.2014.04.021 　

ISSN： 0920-3796

eISSN： 1873-7196
Performance of a Mechanical Bridge Joint for 30-kA-Class High-Temperature Superconducting Conductors Peer-reviewed

Satoshi Ito, Kenji Kawai, Yutaro Seino, Tatsuya Ohinata, Yusuke Tanno, Nagato Yanagi, Yoshiro Terazaki, Kyohei Natsume, Shinji Hamaguchi, Hiroki Noguchi, Hitoshi Tamura, Toshiyuki Mito, Akio Sagara, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　24　(3)　4602305　2014/06

DOI： 10.1109/TASC.2013.2291157 　

ISSN： 1051-8223

eISSN： 1558-2515
Joint Resistance Characteristics of Mechanical Lap Joint of a GdBCO Tape With a Change in Temperature and Magnetic Field Peer-reviewed

Yutaro Seino, Satoshi Ito, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　24　(3)　4602105　2014/06

DOI： 10.1109/TASC.2013.2289356 　

ISSN： 1051-8223

eISSN： 1558-2515
Progress of the Design of HTS Magnet Option and R boolean AND D Activities for the Helical Fusion Reactor Peer-reviewed

N. Yanagi, Y. Terazaki, S. Ito, K. Kawai, Y. Seino, T. Ohinata, Y. Tanno, K. Natsume, S. Hamaguchi, H. Noguchi, H. Tamura, T. Mito, H. Hashizume, A. Sagara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　24　(3)　4202805　2014/06

DOI： 10.1109/TASC.2013.2292775 　

ISSN： 1051-8223

eISSN： 1558-2515
Critical Current Measurement of 30 kA-Class HTS Conductor Samples Peer-reviewed

Y. Terazaki, N. Yanagi, S. Ito, K. Kawai, Y. Seino, T. Ohinata, Y. Tanno, K. Natsume, S. Hamaguchi, H. Noguchi, H. Tamura, T. Mito, H. Hashizume, A. Sagara

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　24　(3)　4801305　2014/06

DOI： 10.1109/TASC.2013.2287715 　

ISSN： 1051-8223

eISSN： 1558-2515
Feasibility of HTS Magnet Option for Fusion Reactors Peer-reviewed

N. Yanagi, S. Ito, Y. Terazaki, K. Natsume, H. Tamura, S. Hamaguchi, T. Mito, H. Hashizume, J. Morikawa, Y. Ogawa, M. Iwakuma, A. Sagara

Plasma and Fusion Research　9　1405013-1-6　2014/03/14
Publisher: Feasibility of HTS Magnet Option for Fusion Reactors
DOI： 10.1585/pfr.9.1405013 　
Development of a 100-kA-class HTS conductor and its mechanical joint for the helical fusion reactor,

Satoshi Ito, Nagato Yanagi, Akio Sagara, Hidetoshi Hashizume

2nd HTS Fusion Conductor Workshop,　2014/01/23
Characteristic Evaluation of Cooling Technique using Liquid Nitrogen and Metal Porous Media Peer-reviewed

Yusuke Tanno, Satoshi Ito, Hidetoshi Hashizume

ADVANCES IN CRYOGENIC ENGINEERING　1573　597-604　2014

DOI： 10.1063/1.4860756 　

ISSN： 0094-243X
Bridge-type mechanical lap joint of a 100 kA-class HTS: Conductor having stacks of GdBCO tapes Peer-reviewed

Satoshi Ito, Yutaro Seino, Nagato Yanagi, Yoshiro Terazaki, Akio Sagara, Hidetoshi Hashizume

Plasma and Fusion Research　9　(2)　3405086　2014
Publisher: Japan Society of Plasma Science and Nuclear Fusion Research
DOI： 10.1585/pfr.9.3405086 　

ISSN： 1880-6821
Optimization of a Mechanical Bridge Joint Structure in a Stacked HTS Conductor Peer-reviewed

Kenji Kawai, Satoshi Ito, Yutaro Seino, Nagato Yanagi, Hitoshi Tamura, Akio Sagara, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　23　(3)　6409408　2013/06

DOI： 10.1109/TASC.2013.2239335 　

ISSN： 1051-8223
Structure improvement and joint resistance estimation in demountable butt and edge joints of a stacked rebco conductor within a metal jacket Peer-reviewed

Satoshi Ito, Tatsuya Ohinata, Leslie Bromberg, Hidetoshi Hashizume

IEEE Transactions on Applied Superconductivity　23　(3)　6425423　2013

DOI： 10.1109/TASC.2013.2244197 　

ISSN： 1051-8223
Verification Test of a Three-Surface-Multi-Layered Channel to Reduce MHD Pressure Drop Peer-reviewed

M. Aoyagi, Y. Inage, S. Ito, S. Ebara, Y. Ueki, K. Yuki, F. Li, S. Smolentsev, T. Yokomine, T. Kunugi, T. Sketchley, M. Abdou, H. Hashizume

Proceedings of The Eighth Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety　2012/12/09
Design Improvement of Three-Surface-Multi-Layered Channel by Reinforceing Inner Metal Layer Peer-reviewed

Y. Inage, M. Aoyagi, S. Ito, H. Hashizume

Proceedings of The Eighth Japan-Korea Symposium on Nuclear Thermal Hydraulics and Safety　2012/12/09
Structure improvement of demountable edge joint of a stacked REBCO conductor within a metal jacket Peer-reviewed

Satoshi Ito, Leslie Bromberg, Hidetoshi Hashizume

Applied Superconductivity Conference 2012 (ASC 2012)　2012/10/07
Improvement of mechanical butt joint of a stacked REBCO conductor by optimizing conductor structure, Peer-reviewed

Tatsuya Ohinata, Satoshi Ito, Hidetoshi Hashizume

Applied Superconductivity Conference 2012 (ASC 2012),　2012/10/07
Three-dimensional MHD flow simulation in an L-shape elbow of a three-surface-multi-layered channel, Peer-reviewed

Mitsuhiro Aoyagi, Satoshi Ito, Takeo Muroga, Hidetoshi Hashizume

27th Symposium on Fusion Technology (SOFT 2012)　2012/09/24
Thermal Analysis on a Remountable High Temperature Superconducting Magnet around Jointing Region

Y. Tanno, S. Ito, H. Hashizume

Proceedings of Ninth International Conference on Flow Dynamics　2012/09/19
Transverse Stress Effects on Critical Current and Joint Resistance in Mechanical Lap Joint of a Stacked HTS Conductor Peer-reviewed

Satoshi Ito, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　22　(3)　6400104　2012/06

DOI： 10.1109/TASC.2011.2176290 　

ISSN： 1051-8223
Proposal of Electrical Edge Joint for a Demountable High-Temperature Superconducting Magnet Peer-reviewed

Satoshi Ito, Leslie Bromberg, Makoto Takayasu, Joseph V. Minervini, Hidetoshi Hashizume

IEEE TRANSACTIONS ON PLASMA SCIENCE　40　(5)　1446-1452　2012/05

DOI： 10.1109/TPS.2012.2190103 　

ISSN： 0093-3813
Numerical Analysis of Microwave NDT Applied to Piping Inspection Peer-reviewed

Yasutomo Sakai, Noritaka Yusa, Satoshi Ito, Hidetoshi Hashizume

MATERIALS TRANSACTIONS　53　(4)　627-630　2012/04

DOI： 10.2320/matertrans.I-M2012805 　

ISSN： 1345-9678

eISSN： 1347-5320
Measurement of the joint resistance of large-current YBCO conductors Peer-reviewed

Yoshiro Terazaki, Nagato Yanagi, Sai Tomida, Hiroki Noguchi, Kyohei Natsume, Toshiyuki Mito, Satoshi Ito, Hidetoshi Hashizume, Akio Sagara

Plasma and Fusion Research　7　(SPL.ISS.1)　2405027　2012

DOI： 10.1585/pfr.7.2405027 　

eISSN： 1880-6821
Fundamental evaluation of joint resistance in mechanical butt joint of a stacked GdBCO conductor Peer-reviewed

Tatsuya Ohinata, Satoshi Ito, Hidetoshi Hashizume

Plasma and Fusion Research　7　(1)　2405045　2012

DOI： 10.1585/pfr.7.2405045 　

ISSN： 1880-6821
Discussion of structural design issues on a remountable high-temperature superconducting magnet

S. Ito, H. Hashizume, H. Tamura, N. Yanagi, S. Imagawa, A. Sagara

21st International Toki Conference (ITC-21)　2011/11/28
Influence of Strain Distribution on Joint Resistance in Mechanical Lap Joint of a Stacked HTS Conductor Peer-reviewed

S. Ito, H. Hashizume

22nd International Conference on Magnet Technology, Marseille, France　2011/09
Thermo-Fluid Simulation in a Liquid Metal Blanket with Three-Surface- Multi-Layered Channel Peer-reviewed

M. Aoyagi, S. Ito, S. Ebara, T. Muroga, H. Hashizume

Fusion Science and Technology　60　(2)　523-527　2011/08
STATUS OF HIGH TEMPERATURE SUPERCONDUCTING FUSION MAGNET DEVELOPMENT Peer-reviewed

L. Bromberg, H. Hashizume, S. Ito, J. V. Minervini, N. Yanagi

FUSION SCIENCE AND TECHNOLOGY　60　(2)　635-642　2011/08

ISSN： 1536-1055
THERMO-FLUID SIMULATION IN A LIQUID METAL BLANKET WITH THREE-SURFACE-MULTI-LAYERED CHANNEL Peer-reviewed

Mitsuhiro Aoyagi, Satoshi Ito, Shinji Ebara, Takeo Muroga, Hidetoshi Hashizume

FUSION SCIENCE AND TECHNOLOGY　60　(1)　283-287　2011/07

ISSN： 1536-1055
Investigation of an Optimum Structure for Mechanical Butt Joint of a Stacked HTS Cable With a Metal Jacket Peer-reviewed

Satoshi Ito, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　21　(3)　1995-1999　2011/06

DOI： 10.1109/TASC.2010.2100346 　

ISSN： 1051-8223
Proposal of electrical edge joint for a demountable high-temperature superconducting magnet Peer-reviewed

Satoshi Ito, Hidetoshi Hashizume, Leslie Bromberg, Makoto Takayasu, Joseph V. Minervini

2011 IEEE/NPSS 24TH SYMPOSIUM ON FUSION ENGINEERING (SOFE)　23　1446-1452　2011

DOI： 10.1109/TPS.2012.2190103 　
Feasibility of a remountable high-temperature superconducting magnet for a helical fusion reactor Peer-reviewed

S. Ito, H. Hashizume, H. Tamura, N. Yanagi, S. Imagawa, A. Sagara

20th International Toki Conference, Toki　2010/12
MHD pressure drop characteristics in a three-surface-multi-layered channel under a strong magnetic field Peer-reviewed

M. Aoyagi, S. Ito, H. Hashizume, T. Muroga

FUSION ENGINEERING AND DESIGN　85　(7-9)　1181-1184　2010/12

DOI： 10.1016/j.fusengdes.2010.02.036 　

ISSN： 0920-3796
A fundamental research of mechanical lap joint of high-temperature superconducting conductor Peer-reviewed

Y. Uchida, S. Ito, H. Hashizume

19th Topical Meeting on the Technology of Fusion Energy　2010/11
Evaluation of microwave in pipes for inspection Peer-reviewed

Y. Sakai, N. Yusa, S. Ito, H. Hashizume

The 15th International Workshop on Electromagnetic Nondestructive Evaluation, Szczecin, Poland, 2010/06/13-16　2010/06
Effect of Thermal Strain on the Mechanical Butt Joint of a Stacked HTS Cable With a Metal Jacket Peer-reviewed

Satoshi Ito, Takeshi Sakashita, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　20　(3)　1747-1750　2010/06

DOI： 10.1109/TASC.2010.2043424 　

ISSN： 1051-8223
Improvement of Joint Structure for Mechanical Butt Joint of Stacked BSCCO 2223 Cable Peer-reviewed

Takeshi Sakashita, Satoshi Ito, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　20　(3)　1751-1754　2010/06

DOI： 10.1109/TASC.2010.2043660 　

ISSN： 1051-8223
Numerical simulation of MHD turbulent flow in a rectangular channel with three-surface-coated multi layers Peer-reviewed

Mitsuhiro Aoyagi, Hidetoshi Hashizume, Kazuhisa Yuki, Satoshi Ito, Takeo Muroga

International Journal of Fluid Mechanics Research　37　(5)　447-457　2010

DOI： 10.1615/InterJFluidMechRes.v37.i5.50 　

ISSN： 1064-2277
Mechanical Butt Joint of Laminated HTS Cable With Metal Jacket for Remountable HTS Magnet Peer-reviewed

Satoshi Ito, Takayuki Kato, Hidetoshi Hashizume

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY　19　(3)　1536-1539　2009/06

DOI： 10.1109/TASC.2009.2019057 　

ISSN： 1051-8223
Advanced cryogenics cooling technique using metal porous media with liquid nitrogen Peer-reviewed

K. Moniwa, S. Ito, K. Yuki, H. Hashizume

Proceedings of ICEC 22-ICMC 2008　329-334　2009
Mechanical Butt Joint of HTS Cable with DFRP for Remountable HTS Magnet Peer-reviewed

S. Ito, H. Hashizume

Proceedings The 16th Pacific Basin Nuclear Conference　2008/10
Microwave Nondestructive Detection of Longitudinal Cracks in Pipe with U-bend and Prediction of its Location by Signal Processing Peer-reviewed

Kavoos Abbasi, Satoshi Ito, Hidetoshi Hashizume

ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XI)　31　154-+　2008

DOI： 10.3233/978-1-58603-896-0-154 　

ISSN： 1383-7281
Microwave Detection of Longitudinal Crack and Identification of Its Location in Straight Pipe Peer-reviewed

Kavoos ABBASI, Satoshi ITO, Hidetoshi HASHIZUME

Journal of Power and Energy Systems　2　(2)　538-544　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jpes.2.538 　

ISSN： 1881-3062

More details Close

A microwave NDT method based on guided electromagnetic wave is described in order to detect longitudinal crack and evaluate its location in steel pipe. To detect longitudinal crack in pipe, suitable guided-mode should be propagated in the inspected pipe with crack. For this purpose, first and dominant circular TE₁₁-mode is sent to the system by using a mode-converter. Mode-converter is used to convert rectangular TE₁₀-mode to the circular TE₁₁-mode. A network analyzer, which is a generator and receiver of the microwaves designed to process the magnitude and phase of the reflected and transmitted waves was used to generate continues signal and to measure the amplitude of reflection coefficient. The goal of this investigation is to demonstrate the capability of this technique for detecting longitudinal cracks in piping system with high speed. More emphasis is put on the evaluation of crack location by measuring time of flight (TOF) of the reflected waves from the crack. The results for two crack locations at several plunger positions either in frequency domain or time domain for measuring TOF of the waves are presented. The experimental results of TOF are compared with calculations to show that by knowing TOF of the reflected wave, it is possible to predict crack locations. The evaluated results of TOFs are shown to agree well with the calculated ones and crack locations can be estimated with error less than 0.13%.
Prove the ability of microwave nondestructive method combined with signal processing to determine the position of a circumferential crack in pipes Peer-reviewed

K. Abbasi, S. Ito, H. Hashizume

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　28　(4)　429-439　2008

ISSN： 1383-5416

eISSN： 1875-8800
Characteristic evaluation of mechanical jointed HTS cable for remountable HTS magnets Peer-reviewed

Satoshi Ito, Shohei Takami, Hidetoshi Hashizume, Yuko Yamamoto, Kazuhisa Yuki, Akio Sagara

FUSION SCIENCE AND TECHNOLOGY　52　(4)　1070-1074　2007/11

ISSN： 1536-1055
Evaluation of HTS butt-jointing performance, focusing on the joint stress distribution Peer-reviewed

Shohei Takami, Hidetoshi Hashizume, Satoshi Ito, Yuko Yamamoto

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　25　(1-4)　281-286　2007

ISSN： 1383-5416
Effect of surface angle on mechanical jointing of HTS Invited Peer-reviewed

Yuko Yamamoto, Shohei Takami, Satoshi Ito, Kazuhisa Yuki, Hidetoshi Hashizume

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS　25　(1-4)　257-260　2007

ISSN： 1383-5416
Evaluation of Circumferential Crack Location in Pipes by Electromagnetic Waves Peer-reviewed

Kavoos Abbasi, Satoshi Ito, Hidetoshi Hashizume, Kazuhisa Yuki

Studies in Applied Electromagnetics and Mechanics　28　117-124　2007
Overview of fundamental study on remountable HTS magnet Peer-reviewed

S. Ito, H. Hashizume

FUSION ENGINEERING AND DESIGN　81　(20-22)　2527-2533　2006/11

DOI： 10.1016/j.fusengdes.2006.07.005 　

ISSN： 0920-3796
Butt jointing performance for remountable HTS magnet by improving contact surface condition Peer-reviewed

S Ito, H Hashizume, K Yuki, S Takami, Y Yamamoto

FUSION ENGINEERING AND DESIGN　81　(8-14)　1491-1496　2006/02

DOI： 10.1016/j.fusengdes.2005.08.062 　

ISSN： 0920-3796
Joint performance of HTc superconductor for remountable magnet system Peer-reviewed

H Hashizume, S Ito, S Takami, A Sagara

FUSION SCIENCE AND TECHNOLOGY　47　(4)　901-905　2005/05

ISSN： 1536-1055
Proposal of remountable HTS magnet system for fusion reactor

S. Ito, S. Takami, Y. Yamamoto, K. Yuki, H. Hashizume

Proceedings of the 8th Japan-China Symposium on Materials for Advanced Energy Systems and Fission and Fusion Engineering　61-66　2004/10/04
Dependence of jointing resistance on transport current in HTc SC tape Peer-reviewed

S. Ito, H. Hashizume

Proceedings of the 3rd Japan, Australia, New Zealand Joint Seminar on Applications of Electromagnetic Phenomena in Electrical and Mechnanical Systems　109-116　2004/01
Progress in Butt Jointing Perfomance for Remountable HTc SC Magnet Peer-reviewed

Hidetoshi Hashizume, Shohei Takami, Satoshi Ito, Kazuhisa Yuki, Yuko Yamamoto

Proceedings of the 3rd Japan, Australia, New Zealand Joint Seminar on Applications of Electromagnetic Phenomena in Electrical and Mechnanical Systems　79-84　2004/01
Performance analysis of butt jointing in remountable HTc superconducting magnets Peer-reviewed

S. Ito, H. Hashizume, T. Yamauchi

International Journal of Applied Electromagnetics and Mechanics　19　467-472　2003
Proposal of mechanically jointed superconducting magnet using high critical temperature superconductors Peer-reviewed

H Hashizume, S Ito, K Yagi, S Kitajima

FUSION ENGINEERING AND DESIGN　63-64　449-454　2002/12

DOI： 10.1016/S0920-3796(02)00271-5 　

ISSN： 0920-3796
Study on mechanical jointing of high temperature superconductors Peer-reviewed

S. Ito, H. Hashizume, S. Kitajima

International Journal of Applied Electromagnetics and Mechanics　14　85-88　2002
Advanced Fusion Design using Remountable HTc SC Magnet Peer-reviewed

HASHIZUME Hidetoshi, KITAJIMA Sumio, ITO Satoshi, YAGI Kenjiro, USUI Yoshiaki, HIDA Yujin, SAGARA Akio

Journal of Plasma and Fusion Research SERIES　5　532-536　2002
Study on mechanical jointing of high temperature superconductors Peer-reviewed

S.Ito, H.Hashizume, S.KItajima

JSAME Studies in Apllied Electromagnetics and Materials　9　283-284　2001/05

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Misc. 5

Status of Research and Development of High Temperature Superconductors for Fusion Reactors:4. Joint Technology of High-Temperature Superconducting Tapes and High-Current Conductors Invited Peer-reviewed

Satoshi Ito

Journal of Plasma Fusion Research　100　(11)　484-489　2024/11
プロジェクトレビュー総説プラズマ・核融合サイエンスチャート 3. 歴史と広がり 3.6 超伝導材料 Peer-reviewed

伊藤悟

プラズマ・核融合学会誌　100　(1)　35-37　2024/01
プロジェクトレビュー総説プラズマ・核融合サイエンスチャート 1. 前書き Peer-reviewed

森芳孝, 横山雅之, 仲田資季, 佐々木徹, 後藤拓也, 金子俊郎, 永岡賢一, 門信一郎, 浅井朋彦, 雨宮高久, 笠田竜太, 伊藤悟, 上原日和, 安原亮

プラズマ・核融合学会誌　100　(1)　3-4　2024/01
核融合炉マグネットへの適用をめざした大電流高温超伝導導体の開発 ― 現在の状況と将来の展望 ― Invited Peer-reviewed

柳長門, 伊藤悟, 寺﨑義朗

低温工学　54　(1)　10-22　2019/01

DOI： 10.2221/jcsj.54.10 　
The Current Status and Prospect of Large-Scale High-TemperatureSuperconducting Magnet Development: Large-Scale Magnet Development Using Segmented Fabrication and Joint Techniques of High-Temperature Superconducting Conductors

HASHIZUME Hidetoshi, ITO Satoshi, YANAGI Nagato, TERAZAKI Yoshiro, TAMURA Hitoshi, EBARA Shinji, YUSA Noritaka, SAGARA Akio

Journal of Plasma and Fusion Research　91　(2)　87-96　2015/02/25
Publisher: The Japan Society of Plasma Science and Nuclear Fusion Research
ISSN： 0918-7928

Presentations 88

Press-welding between HTS tape conductors with low-temperature solders including indium

Satoshi Ito, Reo Tamura, Haruumi Yamamoto, Taiki Onji, Masaru Tomita

Applied Superconductivity Conference 2024 (ASC 2024)　2024/09/05
Manufacturability and joint performance evaluations of joints in segmented HTS magnets: (1) Overview

Satoshi Ito, Hidetoshi Hashizume

2024/06/14
Insert metal dependency of joint performance in press welding between high-temperature superconducting tapes

Satoshi Ito, Reo Tamura, Haruumi Yamamoto, Taiki Onji, Masaru Tomita

2024/05/23
Evaluation of heating temperature and time duration dependence of critical current and interfacial resistivity in REBCO tapes

Satoshi Ito, Yosuke Atake, Koich Sato, Hidetoshi Hashizume

2023/12/04
Initial study on press welding with indium applied to high-temperature superconducting DC feeder cables

Satoshi Ito, Luis Aparicio, Yosuke Atake, Haruumi Yamamoto, Taiki Onji, Masaru Tomita

Applied Superconductivity Conference 2022　2022/10/26
分割型高温超伝導マグネットのための接合抵抗分析研究および照射特性研究の現状

伊藤悟, 橋爪秀利

第14回核融合エネルギー連合講演会　2022/07/08
R&D of low-resistance joint of HTS STARS conductors with indium insertion

Satoshi Ito, Nagato Yanagi, Hitoshi Tamura, Hidetoshi Hashizume

5th HTS4fusion Conductor Workshop　2022/06/29
Current status of technical development for segment-fabrication of high-temperature superconducting fusion magnet

Satoshi Ito, Nagato Yanagi, Hitoshi Tamura, Hidetoshi Hashizume

The 30th International Toki Conference on Plasma and Fusion Research (ITC-30)　2021/11/18
Joint resistance evaluation of longer HTS tape joints with indium inserion

Satoshi Ito, Luis Aparicio, Yosuke Atake, Kohei Yuki, Hidetoshi Hashizume

The 27th International conference on Magnet Technology (MT27)　2021/11/17
Initial study on low-temperature heat treatment joint with indium applied to high-temperature superconducting cable

Satoshi ITO, Luis APARICIO, Yosuke ATAKE, Kohei YUKI, Hidetoshi HASHIZUME, Taiki ONJI, Tomoyuki AKASAKA, Atsushi ISHIHARA, Masaru TOMITA

2021/05/21
Low-resistance Joint Development for Segment-fabrication of High-temperature Superconducting Fusion Magnets

Satoshi Ito, Hitoshi Tamura, Nagato Yanagi, Hidetoshi Hashizume

28th IAEA Fusion Energy Conference (FEC 2020)　2021/05/13
Improvement of mechanical joint of high-temperature superconducting tapes using indium foil and low-temperature heat treatment

Satoshi Ito, Ryoichiro Hayasaka, Kohei Yuki, Yosuke Atake, Hidetoshi Hashizume, Takeharu Kato, Daisaku Yokoe

2020/12/10
シンポジウム「高温超伝導技術が切り拓く新たな核融合研究展開」着脱式先進高温超伝導マグネット技術

伊藤悟

第37回プラズマ・核融合学会年会　2020/12/04
Different HTS tapes joint with indium-insertion using low-temperature heat treatment

Satoshi Ito, Ryoichiro Hayasaka, Kohei Yuki, Hidetoshi Hashizume

Applied Superconductivity Conference 2020　2020/10/29
Fablication of longer HTS tape joints with indium insertion

Satoshi Ito, Ryoichiro Hayasaka, Kohei Yuki, Hidetoshi Hashizume

10th ACASC/2nd Asian ICMC/CSSJ Joint Conference　2020/01/09
Joining condition dependency of joint resistance in UW of HTS tapes with indium International-presentation

Satoshi Ito, Ryoichiro Hayasaka, Kohei Yuki, Yutaka S. Sato, Hidetoshi Hashizume

14th European Conference on Applied Superconductivty (EUCAS 2019)　2019/09/02
高温超伝導線材のインジウム挿入超音波接合：接合性能のホーン・接合時間依存性評価

伊藤悟, 早坂遼一路, 佐藤裕, 橋爪秀利

第98回春季低温工学・超電導学会　2019/05/30
高温超伝導線材のインジウム低温熱処理機械的接合

伊藤悟, 早坂遼一路, 橋爪秀利, 加藤丈晴, 横江大作

2018年度秋季（第96回）低温工学・超電導学会　2018/11/19
Comparison of heat assisted lap joints of high-temperature superconducting tapes with inserted indium foils International-presentation

S. Ito, H. T. Fujii, R. Hayasaka, Y. S. Sato, H. Hashizume

Applied Superconductivity Conference 2018　2018/10/31
Bridge-type mechanical lap joint of HTS STARS conductors using an integrated joint piece International-presentation

S. Ito, H. Hashizume, N. Yanagi, H. Tamura

30th Symposium on Fusion Technology　2018/09/18
分割型高温超伝導マグネットのための接合／冷却技術研究開発の現状

伊藤悟, 橋爪秀利, 柳長門, 田村仁

第12回核融合エネルギー連合講演会　2018/06/28
Resistance and critical current characteristics of demountable lap joint of various HTS tapes International-presentation

S. Ito, R. Hayasaka, H. Hashizume

9th Workshop on Mechanical and Electromagnetic Properties of Composite Superconductors (MEM18)　2018/06/20
インジウム箔を用いた高温超伝導線材の超音波接合の基礎検討

伊藤悟, 藤井啓道, 佐藤裕, 橋爪秀利

第96回（2018年度春季）低温工学・超電導学会　2018/05/30
Sample preparation for electro-mechanical measurements of mechanical lap joint of 10-kA-class prototype HTS STARS conductors International-presentation

S. Ito, T. Nishio, R. Hayasaka, L. Aparicio, N. Yanagi, Y. Terazaki, N. Bagrets, M. J. Wolf, H. Tamura, K.-P. Weiss, H. Hashziume, A. Sagara, Reinhard Heller, W. H. Fietz

4th HTS4Fusion Conductor Workshop　2018/03/22
Applicability evaluation of quench detectable hybrid REBCO tape to HTS magnet for fusion reactors International-presentation

S. Ito, S. Hasegawa, N. Yanagi, H. Hashizume

CHATS on Applied Superconductivity 2017　2017/12/10
Advanced High-temperature Superconducting Magnet for Fusion Reactors International-presentation Invited

S. Ito, H. Hashizume, N. Yanagi, T. Tamura

13th International Symposium on Fusion Nuclear Technology　2017/09/26
Electro-mechanical measurements of mechanical lap joint of HTS STARS conductors International-presentation

S. Ito, T. Nishio, N. Yanagi, Y. Terazaki, N. Bagrets, M.J. Wolf, H. Tamura, K-P. Weiss, H. Hashziume, A. Sagara, W.H. Fietz

25th International Conference on Magnet Technology　2017/08/27
分割型高温超伝導マグネットの機械的接合部への熱処理の適用検討

伊藤悟, 西尾樹, 橋爪秀利

第94回(2017年春季) 低温工学・超電導学会　2017/05/22
核融合炉開発と先進超伝導マグネット設計

電子情報通信学会東北支部講演会　2016/11/18
Bending Characteristic of a Bridge-type Mechanical Lap Joint of REBCO Tapes

S. Ito, T. Nishio, H. Hashizume

Applied Superconductivity Conference 2016　2016/09/04
分割型高温超伝導マグネット接合部製作技術の開発進展

伊藤悟, 橋爪秀利, 柳長門, 田村仁, 相良明男

第11回核融合エネルギー連合講演会　2016/07/14
分割型高温超伝導マグネットの接合／冷却技術の研究進展 (1) 金属多孔質挿入流路の熱伝達特性

伊藤悟, 佐々木駿介, 橋爪秀利

日本原子力学会2016年春の年会　2016/03/26
分割型高温超伝導マグネットの接合性能の分析／改善法の研究進展 (1) 接合抵抗の磁場方向依存性評価

伊藤悟, 清野祐太郎, 西尾樹, 小黒英俊, 橋爪秀利

第92回(2015年秋季) 低温工学・超電導学会　2015/12/02
革新的核融合炉実現に向けた分割型高温超伝導マグネットの研究開発〜高温超伝導導体の着脱可能な接合法の開発状況〜

伊藤悟, 橋爪秀利, 遊佐訓孝, 柳長門, 田村仁, 相良明男

プラズマ・核融合学会第32回年会　2015/11/24
Structure and magnetic field dependences of joint resistance in a mechanical joint of REBCO tapes International-presentation

Satoshi Ito, Yutaro Seino, Tatsuki Nishio, Hidetoshi Oguro, Hidetoshi Hashizume

International Conference on Magnet Technology 24 (MT-24)　2015/10/18
Mechanical and Electrical Characteristics of a Bridge-type Mechanical Lap Joint of HTS STARS Conductors Based on a Joint Test and an X-ray Inspection International-presentation

Satoshi Ito, Noritaka Yusa, Nagato Yanagi, Hitoshi Tamura, Akio Sagara, Hidetoshi Hashizume

3rd HTS4Fusion Conductor Workshop　2015/09/11
分割型高温超伝導マグネットの接合性能予測手法と接合部製作法の改善

伊藤悟, 清野祐太郎, 西尾樹, 陳偉熙, 遊佐訓孝, 橋爪秀利, 小黒英俊

第91回(2015年春季) 低温工学・超電導学会　2015/05/27
分割型高温超伝導マグネットの接合性能予測手法の高度化 (1) 接合抵抗の温度・磁場依存性予測

伊藤悟, 清野祐太郎, 橋爪秀利, 小黒英俊

日本原子力学会 2015年春の年会　2015/03/20
Boiling Heat Transfer Characteristics of a Cryogenic Coolant with Metal Porous Media and Thermal Analysis on a Segmented High-Temperature Superconducting Magnet International-presentation

S. Ito, H. Hashizume

21st Topical Meeting on the Technology of Fusion Energy　2014/11/09
導体接続方式ヘリカルコイル設計のためのREBCOテープの機械的ラップジョイントの引張・せん断強度評価

伊藤悟, 小黒英俊, 田村仁, 柳長門, 相良明男, 橋爪秀利

第90回(2014年秋季) 低温工学・超電導学会　2014/11/05
Fundamental investigation on tensile characteristics of mechanical lap joint of a REBCO tape

Satoshi Ito, Hidetoshi Oguro, Hitoshi Tamura, Nagato Yanagi, Hidetoshi Hashizume

Applied Superconductivity Conference 2014　2014/08/11
ヘリカル型核融合炉用100kA級高温超伝導導体の開発(2)機械的ブリッジジョイントの抵抗評価

伊藤悟, 清野祐太郎, 柳長門, 寺﨑義朗, 相良明男, 橋爪秀利

第10回核融合エネルギー講演会　2014/06/19
Development of a 100-kA-class HTS conductor and its mechanical joint for the helical fusion reactor International-presentation

S. Ito, N. Yanagi, A. Sagara, H. Hashizume

2nd HTS4Fusion Conductor Workshop　2014/01/23
ヘリカル型核融合炉への適用を目指した100 kA級高温超伝導導体の製作と試験 (2) 接合部抵抗評価

伊藤悟, 清野祐太郎, 柳長門, 寺﨑義朗, 相良明男, 橋爪秀利

第88回(2013年秋季) 低温工学・超電導学会　2013/12/04
Bridge-type mechanical lap joint of a 100 kA-class HTS conductor having stacks of GdBCO tapes International-presentation

S. Ito, Y. Seino, N. Yanagi, Y. Terazaki, A. Sagara, H. Hashizume

23rd International Toki Conference (ITC-23)　2013/11/18
Numerical study of the MHD flow characteristics in a three-surface-multi-layered channel with different inlet conditions International-presentation

Mitsuhiro AOYAGI, Satoshi ITO, Hidetoshi HASHIZUME

11th International Symposium on Fusion Nuclear Technology　2013/09/16
核融合炉用分割型マグネットのための大型高温超伝導導体の機械的接合法の研究開発

伊藤悟, 柳長門, 相良明男, 橋爪秀利

日本原子力学会 2013年秋の大会　2013/09/03
Performance Evaluation of the Mechanical Bridge Joint for 30 kA Class HTS Conductor Samples International-presentation

Satoshi Ito, Kenji Kawai, Yutaro Seino, Tatsuya Ohinata, Yusuke Tanno, Nagato Yanagi, Yoshiro Terazaki, Kyohei Natsume, Shinji Hamaguchi, Hiroki Noguchi, Hitoshi Tamura, Toshiyuki Mito, Akio Sagara, Hidetoshi Hashizume

23rd International Conference on Magnet Technology　2013/07/14
30 kA級高温超伝導導体の製作と試験（その2） (3)接合部抵抗評価

伊藤悟, 川井健司, 清野祐太郎, 大日方達也, 丹野裕介, 柳長門, 寺﨑義朗, 夏目恭平, 濱口真司, 野口博基, 田村仁, 三戸利行, 相良明男, 橋爪秀利

2013年度春季低温工学・超電導学会　2013/05/13
30 kA級高温超伝導導体の製作と試験 (3)接合部抵抗評価

伊藤悟, 川井健司, 清野祐太郎, 柳長門, 寺﨑義朗, 夏目恭平, 濱口真司, 野口博基, 田村仁, 三戸利行, 相良明男, 橋爪秀利

2012年度秋季低温工学・超電導学会　2012/11/07
Structure improvement of demountable edge joint of a stacked REBCO conductor within a metal jacket International-presentation

Satoshi Ito, Leslie Bromberg, Hidetoshi Hashizume

Applied Superconductivity Conference 2012 (ASC 2012)　2012/10/07
分割型高温超伝導マグネットのための高温超伝導導体の機械的エッジジョイントの基礎研究

Satoshi ITO, Leslie BROMBERG, Makoto TAKAYASU, Joseph MINERVINI, 橋爪秀利

第9回核融合エネルギー連合講演会　2012/06/28
Effect of Thermal Strain in Mechanical Butt Joint of Stacked HTS Cable with Metal Jacket International-presentation

S. Ito, H. Hashizume

22nd International Conference on Magnet Technology　2011/09/12
Proposal of electrical edge joint for a demountable high-temperature superconducting magnet International-presentation

Satoshi Ito, Leslie Bromberg, Makoto Takayasu, Joseph V. Minervini, Hidetoshi Hashizume

The 38th International Conference on Plasma Science and 24th Symposium on Fusion Engineering　2011/06/26
Feasibility of a remountable high-temperature superconducting magnet for a helical fusion reactor International-presentation

Satoshi ITO, Hidetoshi HASHIZUME, Hitoshi TAMURA, Nagato YANAGI, Shinsaku IMAGAWA, Akio SAGARA

20ｔｈ International Toki Conference　2010/12/07
金属ジャケット付BSCCO2223導体の機械的バットジョントの接合構造の改善

伊藤悟, 坂下武志, 橋爪秀利

2010年度秋季低温工学・超電導学会　2010/12/01
Investigation of an optimum structure for mechanical butt joint of a stacked HTS cable with a metal jacket International-presentation

Satoshi Ito, Hidetoshi Hashizume

Applied Superconductivity Conference 2010　2010/08/01
金属ジャケット付BSCCO2223導体の機械的バットジョントの基礎評価

伊藤悟, 坂下武士, 橋爪秀利

2009年度秋季低温工学・超電導学会　2009/11/18
Effect of Thermal Strain in Mechanical Butt Joint of Stacked HTS Cable with Metal Jacket International-presentation

S. Ito, T. Sakashita, H. Hashizume

21st International Conference on Magnet Technology　2009/10/18
金属多孔質体を用いた液体窒素伝熱促進に関する基礎研究

伊藤悟, 茂庭圭介, 橋爪秀利, 結城和久

2009年度春季低温工学・超電導学会　2009/05/13
Mechanical Butt Joint of Laminated HTS Cable with Metal Jacket for Remountable HTS Magnet International-presentation

Satoshi Ito, Takayuki Kato, Hidetoshi Hashizume

Applied Superconductivity Conference 2008　2008/08/17
U字管を含む配管系におけるマイクロ波探傷法による軸方向き裂の検知

伊藤悟, 橋爪秀利, Kavoos ABBASI

日本保全学会第5回学術講演会　2008/07/10
分割型高温超伝導マグネットの設計オプションの提示

伊藤悟, 橋爪秀利, 加藤喬之, 茂庭圭介, 坂下武志

第7回核融合エネルギー連合講演会　2008/06/19
コンジット型BSCCO2223ケーブルの機械的バットジョイントの基礎研究

伊藤悟, 加藤喬之, 橋爪秀利

2008年度秋季低温工学・超電導学会　2008/05/26
Microwave Nondestructive Detection of Longitudinal Crack in Pipe with U-Bend International-presentation

Satoshi ITO, Hidetoshi HASHIZUME, Kavoos ABBASI

The 5th International Conference on Mechanical Science based on Nanotechnology　2008/03/06
分割型高温超伝導マグネットの基礎研究

伊藤悟

核融合科学研究所・共同研究研究会「核融合と応用技術」　2008/03/05
分割型高温超伝導マグネットのためのセルフジョイント法の提案

伊藤悟, 山本裕子, 橋爪秀利, 西島元

2007年度秋季低温工学・超電導学会　2007/11/20
Proposal of self-jointing system for remountable HTS magnet International-presentation

S. Ito, Y. Yamamoto, H. Hashizume, G. Nishijima

The 20th Biennial Conference on Magnet Technology　2007/08/27
分割型高温超伝導マグネット研究の現状と今後の展開

伊藤悟, 橋爪秀利

核融合科学研究所・共同研究研究会「核融合と応用技術」　2007/03/07
マイクロ波探傷法による配管内軸方向き裂位置同定法の基礎研究

伊藤悟, 橋爪秀利, Kavoos Abbasi

第10回表面探傷シンポジウム　2007/01/25
CHARACTERISTIC EVALUATION OF MECHANICAL JOINTED HTS CABLE FOR REMOUNTABLE HTS MAGNET International-presentation

Satoshi Ito, Shohei Takami, Hidetoshi Hashizume: Yuko Yamamoto, Kazuhisa Yuki, Akio Sagara

17th ANS Topical Meeting on Technology of Fusion Energy　2006/11/12
原子力プラントにおける保全計画の最適化手法の構築

伊藤悟, 白石夏樹, 結城和久, 橋爪秀利

日本保全学会第3回学術講演会　2006/07/06
分割型高温超伝導マグネットプロトタイプの製作と評価

伊藤悟, 高見正平, 山本裕子, 結城和久, 橋爪秀利

第18回「電磁力関連のダイナミクス」シンポジウム　2006/05/18
CRACK DETECTION BY USING ELECTROMAGNETIC WAVES International-presentation

Kavoos Abbasi, Satoshi Ito, Hidetoshi Hashizume, Kazuhisa Yuki

5th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components　2006/05/10
Overview of fundamental study on remountable HTS magnet International-presentation

Satoshi Ito, Hidetoshi Hashizume

15th International Toki Conference　2005/12/06
Prototype of the remountable HTS magnet International-presentation

Satoshi Ito, Shohei Takami, Yuko Yamamoto, Hidetoshi Hashizume

12th International Symposium on Applied Electromagnetics and Mechanics　2005/09/12
高温超伝導ケーブルの機械的接合法における接合部抵抗値の電流依存性

伊藤悟, 高見正平, 山本裕子, 結城和久, 橋爪秀利

第17回「電磁力関連のダイナミクス」シンポジウム　2005/06/22
Butt jointing performance for remountable HTS magnet by improving contact surface condition International-presentation

Satoshi Ito, Hidetoshi Hashizume, Kazuhisa Yuki, Shohei Takami, Yuko Yamamoto

The 7th International Symposium on Fusion Nuclear Technology　2005/05/22
Proposal of remountable HTS magnet system for fusion reactor International-presentation

Satoshi Ito, Shohei Takami, Yuko Yamamoto, Kazuhisa Yuki, Hidetoshi Hashizume

8th Japan-China Symposium on Materials for Advanced Energy Systems and Fission & Fusion Engineering　2004/10/04
分割型超伝導マグネットにおける高温超伝導体の断面接合性能の向上

伊藤悟, 高見正平, 山本裕子, 結城和久, 橋爪秀利

第5回核融合エネルギー連合講演会　2004/06/17
Dependence of jointing resistance on transport current in HTc SC tape International-presentation

Satoshi Ito, Hidetoshi Hashizume

3rd Japan, Australia, New Zealand Joint Seminar on Applications of Electromagnetic Phenomena in Electrical and Mechanical Systems　2004/01/22
Numerical evaluation of MHD pressure drop increase due to crack existence in coated layer International-presentation

Satoshi Ito, Hidetoshi Hashizume, Masaaki Satake, Akio Sagara

JUPITER-II Workshop on “Modeling and Design of Materials Systems for Fusion Blankets”　2003/12/10
高温超伝導テープの直接接合に関する研究（その3）

伊藤悟, 山内毅, 北島純男, 橋爪秀利

第15回「電磁力関連のダイナミクス」シンポジウム　2003/05/28
Performance analysis of butt jointing in remountable HTc superconducting magnet International-presentation

Satoshi Ito, Kenjiro Yagi, Takeshi Yamauch, Sumio Kitajima, Hidetoshi Hashizume

11th International Symposium on Applied Electromagnetics and Mechanics　2003/05/12
高温超伝導テープの直接接合に関する研究（その2）

伊藤悟, 八木賢治郎, 北島純男, 橋爪秀利

第14回「電磁力関連のダイナミクス」シンポジウム　2002/05/22
Proposal of mechanically jointed superconducting magnet using high critical temperature superconductors International-presentation

Satoshi Ito, Kenjiro Yagi, Hidetoshi Hashizume, Sumio Kitajima

The 6th International Symposium on Fusion Nuclear Technology　2002/04/07
高温超伝導テープの直接接合に関する研究

伊藤悟, 橋爪秀利

第13回「電磁力関連のダイナミクス」シンポジウム　2001/06/21
Study on mechanical jointing of high temperature superconductors International-presentation

Satoshi Ito, Hidetoshi Hashizume, Sumio Kitajima

10th International Symposium on Applied Electromagnetics and Mechanics　2001/05/13

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Industrial Property Rights 2

高温酸化物超電導テープ線材の接合方法

伊藤悟, 橋爪秀利, 佐藤裕

特許第7531205号

Property Type: Patent

Holder: 国立大学法人東北大学
常電導転移検出センサー付き高温超電導線材

橋爪秀利, 伊藤悟, 泊瀬川晋

Property Type: Patent

Research Projects 13

Study on reduction technique of MHD pressure drop using three-surface multi-layer coated channel in liquid metal blanket of a fusion reactor Competitive

System: The Other Research Programs

2007/04 - Present
Fundamental Study on Remountable HTS Magnet (Study on mechanical joint of HTS conductor, Study on heat transfer enhancement of liquid nitrogen with metal porous media) Competitive

System: The Other Research Programs

2000/04 - Present
制約のない磁場配位が可能な分割型高温超伝導マグネットにおける接合現象の多角的理解

伊藤悟

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 東北大学

2025/04/01 - 2028/03/31
Development of 4-phase continuous diverter system by MHD controlling

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2021/04/05 - 2026/03/31
Detailed analysis of joining characteristics and establishment of maintenance scenario for remountable high temperature superconducting magnet under irradiation environment

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2020/04/01 - 2023/03/31
New developments of remountable high-temperature superconducting magnet by introducing a maintenance viewpoint

Ito Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2017/04/01 - 2020/03/31

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For maintenance and operation of remountable high-temperature superconducting magnet for fusion reactor, we conducted 1) Optimization of joint technique considering maintenance scenario, and 2) Development of condition-based maintenance technique using superconducting quench sensors. For 1), we proposed new joint structure based on results of stress condition at joint section of the magnet during fabrication and operation phases and those of mechanical testing of joint samples of REBCO high-temperature superconducting tapes. Then we achieved to avoid a joint resistance increase at reattaching process. For 2) we demonstrated that NbTi sensor can detect quench in a REBCO pancake coil. In addition, we showed that MgB2 and B-2212 sensors can detect quench under magnetic field produced by fusion magnets based on numerical analysis.
Demonstration of a remountable high-temperature superconducting magnet and construction of universal joints toward the realization of an innovative fusion reactor

Hashizume Hidetoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (S)

Institution: Tohoku University

2014/05/30 - 2019/03/31

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We established a method to predict the jointing resistance of the REBCO tapes under cryogenic temperature, strong magnetic field environment and improved heat transfer correlation for pool boiling in the metal porous media indispensable for the cooling performance prediction. In addition, we introduced joint piece and low temperature heat-treatment into the bridge-type mechanical lap joint of the 10kA conductor to succeed realizing 1/3 jointing resistance with 1/6 fabrication time. Furthermore, we performed a pinning center introduction based on a critical state model and a self-magnetic field evaluation by using proton beam irradiation to show controllability of a critical current density, which indicates the possibility of the function-divided conductor based on the superconductivity physics. According to the above results, the demountable high Tc superconducting magnet for an innovative nuclear fusion reactor is demonstrated together with the general jointing method for the magnets.
Establishment of the optimum mechanical contact interface structure and senario of joint load hysteresis for remountable high-temperature superconducting magnet

Ito Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2014/04/01 - 2017/03/31

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Remountable high-temperature superconducting magnet using mechanical joint has been proposed as design of superconducting magnet for an innovative fusion reactor. This study aims at prediction and reduction of joint resistance, and establishment of the optimum loading scenario considering fabrication, operation and remounting of joint sections through quantitative evaluation of temperature, magnetic field and stress dependence of joint resistance. This study established a model to explain temperature and magnetic field dependence of contact resistance and achieved reduction of joint resistance by introducing heat treatment at around 100 degree C at fabrication. This study also showed that operation, remounting of the joint is possible based on mechanical and electrical characteristics of the joint.
Design of joint structure with electromagnetic forces in a remountable high-temperature superconducting magnet by quantification of joint resistance generating mechanism

ITO Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (A)

Institution: Tohoku University

2011/04/01 - 2014/03/31

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Research and development of mechanical joint of high-temperature superconducting (HTS) conductor are required for a remountable HTS magnet proposed to realize a fusion reactor having high economic efficiency and maintainability. In this research, joint resistance generating mechanism was quantified based on superconductivity and contact theories, then a method of joint resistance prediction needed to investigate joint structure for a mechanical joint of a large-scale conductor. In addition, we proposed mechanical bridge and edge joints as new mechanical joints and demonstrate low joint resistance with the joints using experiments and numerical analyses. Furthermore, we discussed the optimum structural design for a remountable magnet based on structural analysis and indicated feasibility of the remountable magnet based on calculation of electric power to run a cryo-plant.
Construction and demonstration of universal joint techniques for realization of a remountable high-temperature superconducting magnet

HASHIZUME Hidetoshi, EBARA Shinji, YUSA Noritaka, ITO Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2011/04/01 - 2014/03/31

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We conducted this research aiming for realization of universal joint techniques to be applied to a remountable high-temperature superconducting magnet. We set three objectives in this research: 1) Establishment of universal joint techniques, 2) Optimization of cooling system using porous media and 3) Design and fabrication of a large-scale conductor and its joint. In the research of the cooling system, we confirmed that metal porous media can suppress film boiling and the fact implies that the system is suitable for the remountable magnet. In addition, we fabricated a large-scale conductor having mechanical joint section and achieved a current of 100 kA. Based on the above results, we demonstrated the concept of joint techniques and a remountable high-temperature superconducting magnet.
Study on crack detection in large piping by using microwave Competitive

System: Nuclear and Atomic Science Research

2005/10 - 2009/03
A challenge for an innovative superconducting magnet introducing the self-joint method

ITO Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (B)

Institution: Tohoku University

2007 - 2009

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The self-joint technique using a material having negative thermal expansion coefficient and electromagnetic force is proposed as a mechanical joint method for a remountable high-temperature superconducting magnet developed for realization of a commercial fusion reactor achieving high economic efficiency and high maintenance performance. Through this study, the following results were obtained. DFRP having negative thermal expansion coefficient can be useful for a mechanical joint method. And low joint resistance can be achieved at high current value needed for a mechanical joint with electromagnetic force.
Realization of remountable high temperature superconducting magnet aiming for prototype reactor

HASHIZUME Hidetoshi, YUKI Kazuhisa, ITO Satoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2006 - 2008

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Social Activities 2

第18回佐高OB夢授業

2022/12/17 -

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母校の千葉県立佐原高校にて、卒業生20名程度による授業が年に1回行われている。2012年度(第8回)に続き、2022年度(第18回)にも講師依頼を受け、高校のときの経験、自身の研究テーマである核融合炉の研究開発、大学教員の仕事に関する授業を行った。
第8回佐高OB夢授業

2012/12/15 -

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母校の千葉県立佐原高校にて、卒業生20名程度による授業が年に1回行われている。8回目を迎える2012年度に講師依頼を受け、自身の研究テーマである核融合炉の研究開発に関する授業を行った。

Other 21

Evaluation of MHD flow characteristics in a multi-layered channel using metal layer with reinforcing structure

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本研究では三面複層コーティング流路の金属層に補強材を取り付けることを提案する。補強材を取り付けることによってMHD圧力損失が増加するものの、補強材近傍のみの流動場が変化するため、それを利用して冷却材を攪拌することにより伝熱を促進するような流路を設計することも可能であると考えられる。本共同研究では模擬補強材付流路の流動特性の定量的評価を目的とし、模擬流路試験部を超伝導マグネット6T-CSMに設置してMHD流動試験を行い、また比較のために数値解析による検討を行う。
補強構造付三面複層コーティング流路の構造設計および流動特性評価

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三面複層コーティング流路の金属層の強度向上を図るため、金属層に補強材を配置することを検討している。この補強材の構造・配置によるMHD流動場の変化、流路強度の変化をMHD流動場解析および構造解析を用いて評価し、最適な補強材配置を検討する。また、補強材付三面複層コーティング流路の模擬流路を製作し、超伝導マグネットのボア内に設置して、MHDポンプによって液体金属を駆動させ、流動特性試験を行ことで、数値解析で評価した補強材配置とMHD流動場の変化の関係を実験的にも確認する。
ヘリカルコイル分割製造のための機械的接合法の開発

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核融合炉用マグネットを分割製造し、組立・分解とする分割型高温超伝導マグネットを提案している。本共同研究では、ヘリカル型デモ炉FFHRのヘリカルコイルに分割型高温超伝導マグネットを適用することを目指して、構造解析（弾性解析・接触解析）や熱伝導解析を用いた分割型ヘリカルコイルの支持構造・冷却構造の検討、大容量高温超伝導導体に適用する接合部の開発、の2点を行うことを目的とする。大容量高温超伝導導体に適用する接合部の開発では、REBCO系（YBCO, GdBCOなど）高温超伝導テープを用いて、FFHRのヘリカルコイルで必要な100 kA級高温超伝導導体に準ずる数kA～数10kA級導体を製作し、各種機械的接合法（バットジョイント、エッジジョイント、ラップジョイント、ブリッジジョイントなど）の適用性を実験的に評価する。また、新たな構造の機械的接合法の検討にも取り組む。数kA程度の基礎試験に関しては東北大学で行うが、数10kA級の導体試験を行う際には、核融合科学研究所の施設を用いる。
Temperature, magnetic field and stress dependences of joint resistance in a mechanical joint of REBCO conductors

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本共同研究では、銅ジャケット付GdBCO導体の機械的接合における接合抵抗の温度・磁場・応力依存性の評価を通して、大型導体の接合抵抗の予測手法を確立することを目的とする。まず、15T-CSMを用いてGdBCOテープ1枚同士の機械的ラップジョイントにおける接合抵抗の温度・磁場・磁場角度依存性を評価し、接合抵抗の発生メカニズムを明らかにし、続いて、数値解析モデルを構築して、抵抗の予測手法を確立する。また、各種機械試験により接合部の機械特性を明らかにする。
Evaluation of MHD flow characteristics in a three-surface-multi-layered channel with an improved structure of inner metal layer

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本研究では三面複層コーティング流路の金属層に補強材を取り付けることを提案する。補強材を取り付けることによってMHD圧力損失が増加するものの、補強材近傍のみの流動場が変化するため、それを利用して冷却材を攪拌することにより伝熱を促進するような流路を設計することも可能であると考えられる。本共同研究では模擬補強材付流路の流動特性の定量的評価を目的とし、模擬流路試験部を超伝導マグネット6T-CSMに設置してMHD流動試験を行い、また比較のために数値解析による検討を行う。
金属層構造最適化による三面複層コーティング流路の先進設計

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三面複層コーティング流路の金属層の強度向上を図るため、金属層に補強材を配置することを検討している。この補強材の構造・配置によるMHD流動場の変化、流路強度の変化をMHD流動場解析および構造解析を用いて評価し、最適な補強材配置を検討する。また、補強材付三面複層コーティング流路の模擬流路を製作し、超伝導マグネットのボア内に設置して、MHDポンプによって液体金属を駆動させ、流動特性試験を行ことで、数値解析で評価した補強材配置とMHD流動場の変化の関係を実験的にも確認する。
分割型マグネット構造設計と高温超伝導導体接合部の開発

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核融合炉用マグネットを分割製造し、組立・分解とする分割型高温超伝導マグネットを提案している。本共同研究では、ヘリカル型デモ炉FFHRのヘリカルコイルに分割型高温超伝導マグネットを適用することを目指して、構造解析（弾性解析・接触解析）や熱伝導解析を用いた分割型ヘリカルコイルの支持構造・冷却構造の検討、大容量高温超伝導導体に適用する接合部の開発、の2点を行うことを目的とする。大容量高温超伝導導体に適用する接合部の開発では、REBCO系（YBCO, GdBCOなど）高温超伝導テープを用いて、FFHRのヘリカルコイルで必要な100 kA級高温超伝導導体に準ずる数kA～数10kA級導体を製作し、各種機械的接合法（バットジョイント、エッジジョイント、ラップジョイント、ブリッジジョイントなど）の適用性を実験的に評価する。また、新たな構造の機械的接合法の検討にも取り組む。数kA程度の基礎試験に関しては東北大学で行うが、数10kA級の導体試験を行う際には、核融合科学研究所の施設を用いる。
Mechanical joint test of ReBCO conductor having large current capacity

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本共同研究では、銅ジャケット付GdBCO導体の機械的接合における接合抵抗の温度・磁場依存性の評価を通して、大型導体の接合抵抗の予測手法を確立することを目的とする。まず、15T-CSMを用いてGdBCOテープ1枚同士の機械的ラップジョイントにおける接合抵抗の温度・磁場依存性を評価し、接合抵抗の発生メカニズムを明らかにし、続いて、数値解析モデルを構築して、抵抗の予測手法を確立する。また、大口径のボアを有する6T-CSMと伝導冷却クライオスタットを用いて、導体の接合部の引張強度と接合抵抗の関係を評価できる実験体系の構築を目指す。
MHD flow characteristics in a three-surface-multi-layered channel under a high magnetic field

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本研究では三面複層コーティング流路によるMHD圧力損失低減効果を実験と数値解析の両面から検証して最終的に核融合炉ブランケットへの適用性を評価することを目的とする。具体的には複層コーティング流路を模擬した流路を製作し、実験的にMHD圧力損失の低減効果を確認する。また、流路と流体の接触抵抗、流体（液体金属）に生じる酸化層の影響を実験的に明らかにし、ブランケット設計に対する工学的な課題の抽出を行う。
三面複層コーティング流路の熱流動工学設計

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三面複層コーティング流路の模擬流路（二重円筒開流路）を金属薄板にセラミックコーティングを施し、流路に挟み込むことで製作する。この三面複層コーティング流路の試験部を含んだ流動実験ループを超伝導マグネットのボア内に設置して、MHDポンプによって液体金属を駆動させ、流動特性試験を行う。圧力損失は試験部前後それぞれでの圧力を計測し算出する。これまでの共同研究の成果により、液体金属と流路壁の間の接触電気抵抗が圧力損失に影響することが確認されているので、接触抵抗の値を計測して、その影響を加味した数値解析結果との比較検討を行う。さらに直線状の三面複層コーティング流路を実際に製作し、日米協力事業核融合分野TITAN計画と連携し、UCLAにて三面複層コーティング流路の圧力損失低減効果の実証試験も行う。また、これまで開発してきた数値解析コードを用いて、ブランケットの成立条件を熱流動、構造解析によって検討するとともに、曲がり管部の流動特性についても評価する。
分割型高温超伝導マグネットのためのYBCO導体の着脱可能な接合方法の研究

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REBCO系高温超伝導テープ材［YBCO、GdBCOなど］を用いて金属ジャケット付高温超伝導導体を製作し、機械的バットジョイント、および機械的ラップジョイントの試験を強磁場環境下で実施して、その成立性を検証する。導体構造、接合面状態、接合力の負荷状況を機械的接合法の性能に影響する因子であると考え、これらを変化させながら、その性能を評価していく。概念設計では構造解析・熱解析を用いて、電磁力、および構造材料の機械的特性の温度依存性を考慮して、ヘリカル型核融合炉FFHRにおいてヘリカルコイルの分割設計が成立する条件を検討する。
高温超電導ケーブルの早期補修・接続を可能とする着脱可能な機械的ラップジョイント技術の基礎研究

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本研究では、高温超電導ケーブルの着脱式簡易型ジョイントを提案する。提案する着脱式簡易型ジョイントを実現するためには、高温超電導テープの機械的ラップジョイント技術、および多孔質体を用いた液体窒素冷却システムを確立することが必要となる。具体的には、1) 直流および交流を印加した場合の接合部の抵抗挙動、電流分布および発熱挙動の解明、2) 液体窒素の多孔質体内流動特性、熱伝達率、最大除去熱流束などの伝熱特性の評価、3) 接合技術と冷却技術を統合したプロトタイプの製作、といったものが実現までに必要な研究項目である。本研究（本年度の研究）では、着脱式簡易型ジョイントを実現するための研究の第一段階である直流を印加した場合の高温超電導テープの機械的ラップジョイントの抵抗評価を行う。
Fundamental study on mechanical joint of HTS conductor with metal jacket

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銅ジャケット付BSCCO2223導体、GdBCO導体を用いて、機械的バットジョイントの試験を行い、温度変化、磁場変化による接合抵抗の変化を評価する。また、接合性能を議論する場合に、臨界電流に関する情報が必要な場合に超伝導テープおよび導体の臨界電流の温度、磁場依存性を取得する。
複層コーティングを用いたMHD圧力損失低減化技術の基礎研究

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本研究では複層コーティング流路を模擬した流路を製作し、作動流体をBiPnとして、流動試験を行い、複層コーティングによるMHD圧力損失低減効果を実験的に証明することを目的とする。流路としては、導電壁流路、絶縁壁流路、複層コーティング流路の3つを用意する。これらをそれぞれ6T-CSM（6T無冷媒超伝導マグネット）に設置して、MHDポンプによって作動流体を駆動し、MHDポンプを停止した後の流動状態を評価することによって複層コーティングによるMHD圧力損失の低減効果を実験的に確かめる。
三面複層コーティングを用いた液体ブランケットの流動特性

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まず、複層コーティング流路の製作方法を検討し、実際に流路製作を行う。続いて、導電壁流路、絶縁壁流路、複層コーティング流路における液体金属BiSn（Uアロイ：融点～135℃）の流動特性試験を行う。流動特性試験では、φ220のボアを持ち6Tの磁場を生可能な伝導冷却超伝導マグネットのボア内に用意した円形自由表面流路を設置して、BiSnをMHDポンプにより駆動し、MHD圧力損失の定量的評価法を用いてMHD圧力低減効果を確認する。また、これまでに開発した数値解析コードを用いて、実験条件と同じ条件となる自由表面かつ遠心力を考慮した流れのシミュレーションを行い、実験結果と比較して考察を加える。
Fundamental Study on Technique for Reduction of MHD Pressure Drop Using Three-Layer Coating

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本研究では三面複層絶縁流路によるMHD圧力損失低減効果を実験と数値解析の両面から検証して最終的に核融合炉ブランケットへの適用性を評価することを目的とする。具体的には絶縁・導電壁・複層コーティング流路での圧力損失測定を行い、各流路での圧力損失の比較を行う。
三面三層コーティングを用いた液体ブランケットの流動特性

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Li-Vブランケット開発においてMHD圧力損失の低減は重要な課題である．その対策として絶縁被膜のある金属薄板を挿入した流路（三面複層コーティング流路）が提案されている．本研究では，強磁場下における三面複層コーティング流路のMHD圧力損失低減効果を実験により評価し，核融合炉ブランケットの適応性について検証することを最終目的とする．本年度は，まず必要な実験体系の確立を目的として実験を行った．
セルフジョイントシステムを導入したBSCCO2223積層ケーブルButt Jointの基礎研究

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平成18年度において採択された研究において、大口径冷凍機冷却クライオスタットを用いて、負膨張性材料（DFRP）による接合の基礎実験を行った。今年度からの研究においても引き続き、DFRPを用いた接合試験を行い、まず、負膨張性材料接合を確立する。続いて、電磁力による接合試験のための予備試験として、高磁場下における高温超伝導ケーブルのButt Jointの特性を確認する。得られたデータを基にセルフジョイントシステムの有効性を検証し、また必要な課題を提示する。
BSCCO2223積層ケーブルのButt Jointにおける接合性能の温度依存性試験

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高温超伝導ケーブルのButt Jointにおいて輸送電流を増加させるために温度を低下させ臨界電流値を増加させることが必要であり、本研究の第一段階の目的は、液体窒素温度未満の温度環境下における接合性能の変化を評価することとする。これは将来的に強磁場中での接合試験を行うための予備実験に相当するものである。
ヘリカル炉における分割型超伝導マグネット実現可能性の検討

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ヘリカル型核融合炉FFHRのヘリカルコイルを分割し、着脱可能とする分割型高温超伝導マグネットの実現を目指している。本共同研究では、東北大学において銅ジャケットを装着した積層BSCCO 2223導体を製作し、機械的接合試験を行うことを通して、材料劣化による接合性の低下、ひずみによる接合面のずれの防止といった工学的課題の解決を図る。また、核融合科学研究所よりヘリカル型核融合炉FFHRのヘリカルコイルの電磁力のデータを提供して頂き、実験結果を基にして構造解析を行い、分割型ヘリカルコイル構造、支持構造物配置などを核融合科学研究所との連携を通して検討し、分割型高温超伝導マグネットのヘリカル炉への適用可能性を評価する。
パルス波を用いたクラックレーダーの開発に関する研究

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本研究は，電磁波(マイクロ波)を用いたより高度なき裂評価システムを構築するため，電磁波発信器と計測器を兼ね備えたネットワークアナライザを導入し，従来よりも広帯域である10MHz～40GHzの電磁波の周波数を精度良く制御し，各周波数に対する欠陥存在による振幅と位相の変化への影響を明らかにし，き裂の絶対位置を評価可能な探傷システムを構築することを目的として行った．

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