RIKEN Center for Biosystems Dynamics Research Next-Generation Magnet Development Collaboration Unit

Unit Leader: Yoshinori Yanagisawa (Ph.D.)

Japanese Page

Research Summary

A Nuclear Magnetic Resonance (NMR) spectrometer can analyze the structure of various substances such as biological samples, polymers, nanomaterials, and natural products using a magnetic field. The analytical performance of an NMR improves as the strength of the magnetic field increases. We conduct research and development on cutting-edge magnet technology that integrates high-temperature superconductor wire, coils, and joints as next-generation high-field magnets for NMR. Based on the technology, we will develop the world’s highest magnetic field NMR magnet as well as ultra-compact NMR magnets without consumption of liquid helium, to contribute to the research of biosystems dynamics through analyses of biological samples.

Selected Publications

1. Y. Tanaka, Y. Suetomi, M. Kawahata, K. Takahashi, T. Takao, K. Kobayashi, R. Piao, T. Yamazaki, Y. Yanagisawa :
"Development of an intra-layer no-insulation (LNI) REBCO coil implemented with a resistance-controlled (RC) interface"
IEEE Transactions on Applied Superconductivity 34, 4604207 (2024)
2. Y. Yanagisawa, R. Piao, Y. Suetomi, T. Yamazaki, K. Yamagishi, T. Ueno, T. Takao, K. Ohki, T. Yamaguchi, T. Nagaishi, H. Kitaguchi, Y. Miyoshi, M. Yoshikawa, M. Hamada, K. Saito, K. Hachitani, Y. Ishii and H. Maeda:
"Development of a persistent-mode NMR magnet with superconducting joints between high-temperature superconductors"
Superconductor Science and Technology, 34, 115006 (2021)
3. Y. Suetomi, T. Yoshida, S. Takahashi, T. Takao, G. Nishijima, H. Kitaguchi, Y. Miyoshi, M. Hamada, K. Saito, R. Piao, Y. Takeda, H. Maeda and Y. Yanagisawa:
"Quench and self-protecting behaviour of an intra-layer no-insulation (LNI) REBCO coil at 31.4 T"
Superconductor Science and Technology, 34, 064003 (2021)
4. S. Takahashi, Y. Suetomi, T. Takao, Y. Yanagisawa, H. Maeda, Y. Takeda and J. Shimoyama.:
"Hoop stress modification, stress hysteresis and degradation of a REBCO coil due to the screening current under external magnetic field cycling"
IEEE Transaction on Applied Superconductivity 30, 4602607 (2020)
5. Y. Suetomi, S. Takahashi, T. Takao, H. Maeda, and Y. Yanagisawa.:
"A novel winding method for a no-insulation (NI) layer-wound REBCO coil to provide a short magnetic field delay and self-protect characteristics"
Superconductor Science and Technology 32, 045003 (13pp) (2019)
6. R. Piao, Y. Miyoshi, M. Yoshikawa, K. Saito, M. Hamada, S. Matsumoto, H. Suematsu, H. Mochida, T. Takao, Y. Suetomi, M. Takahashi, H. Maeda, and Y. Yanagisawa.:
"Design and development of a compact 1 GHz (23.5 T)-class NMR magnet with Bi-2223 inner coils"
IEEE Transaction on Applied Superconductivity, 29, 4300407 (2019)
7. H. Maeda and Y. Yanagisawa.:
"Future prospects for NMR magnets: A perspective"
Journal of Magnetic Resonance 306, 80-85 (2019)
8. K. Ohki, T. Nagaishi, T. Kato, D. Yokoe, T. Hirayama, Y. Ikuhara, T. Ueno, K. Yamagishi, T. Takao, R. Piao, H. Maeda and Y. Yanagisawa.:
"Fabrication, microstructure and persistent current measurement of an intermediate grown superconducting (iGS) joint between REBCO-coated conductors"
Superconductor Science and Technology 30, 115017 (7pp) (2017)
9. K. Hashi, S. Ohki, S. Matsumoto, G. Nishijima, A. Goto, K. Deguchi, K. Yamada, T. Noguchi, S. Sakai, M. Takahashi, Y. Yanagisawa, S. Iguchi, T. Yamazaki, H. Maeda, R. Tanaka, T. Nemoto, H. Suematsu, T. Miki, K. Saito, and T. Shimizu.:
"Achievement of 1020 MHz NMR"
Journal of Magnetic Resonance, 256, 30-33 (2015)
10. H. Maeda and Y. Yanagisawa.:
"Recent developments in high-temperature superconducting magnet technology (Review)"
IEEE Transaction on Applied Superconductivity, 24, 4602412, (2014)

Lab Members

Principal investigator

Yoshinori Yanagisawa: Unit Leader

Core members

Toshio Yamazaki: Senior Scientist
Kensuke Kobayashi: Research Scientist
Renzhong Piao: Technical Scientist

Contact Information

Central Research Building,
1-7-22 Suehiro-cho, Tsurumi-ku,
Yokohama City, Kanagawa,
230-0045, Japan
Tel: +81-(0)45-503-9477
Fax: +81-(0)45-503-9446
Email: yoshinori.yanagisawa@riken.jp