Photo of Unit leder, Yoshinori Yanagisawa

Unit Leader
Yoshinori Yanagisawa Ph.D.

Next-Generation Magnet Development Collaboration Unit

[Affiliation has changed to RIKEN Center for Integrated Medical Sciences (IMS) as of April 2025]

LocationYokohama / Central Research Building

E-mailyoshinori.yanagisawa@riken.jp

Developing functional high-field magnet for analyzing biological samples

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.

Research Theme

NMR
High-temperature superconductor
Ultra-high magnetic field

Selected Publications

Tanaka Y, Suetomi Y, Kawahata M, et al.
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)

Yanagisawa Y, Piao R, Suetomi Y, et al.
Development of a persistent-mode NMR magnet with superconducting joints between high-temperature superconductors
Superconductor Science and Technology 34, 115006 (2021)

Suetomi Y, Yoshida T, Takahashi S, et al.
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)

Takahashi S, Suetomi Y, Takao T, et al.
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)

Suetomi Y, Takahashi S, Takao T, et al.
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)

Piao R, Miyoshi Y, Yoshikawa M, et al.
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)

Maeda H, Shimoyama J, Yanagisawa Y, et al.
The MIRAI program and the new super-high field NMR initiative in Japan.
IEEE Transaction on Applied Superconductivity 29, 4602409 (2019)

Maeda H, Yanagisawa Y.
Future prospects for NMR magnets: A perspective.
Journal of Magnetic Resonance 306, 80-85 (2019)

Ohki K, Nagaishi T, Kato T, et al.
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)

Suetomi Y, Yanagisawa K, Nakagome H, et al.
Mechanism of notable difference in the field delay times of no-insulation layer-wound and pancake-wound REBCO coils.
Superconductor Science and Technology 29, 105002(9pp) (2016)

Piao R, Iguchi S, Hamada M, et al.
High resolution NMR measurements using a 400 MHz NMR with an (RE)Ba₂Cu₃O_7-x high-temperature superconducting inner coil: Towards a compact super-high-field NMR.
Journal of Magnetic Resonance 263, 164-171 (2016)

Hashi K, Ohki S, Matsumoto S, et al.
Achievement of 1020 MHz NMR.
Journal of Magnetic Resonance 256, 30-33 (2015)

Maeda H, Yanagisawa Y.
Recent developments in high-temperature superconducting magnet technology. (Review).
IEEE Transaction on Applied Superconductivity 24, 4602412 (2014)

Members