1. Cryogenics Science Center, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan
2. Mechanical Engineering Center, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan
3. KAGRA Observatory, Institute for Cosmic Ray Research (ICRR), The University of Tokyo, Hida, Japan
4. Hitachi Ltd., Hitachi, Japan
5. Fusac Technologies Company Ltd., Takarazuka, Japan
6. European Organization for Nuclear Research (CERN), Geneva, Switzerland
7. Université Paris-Saclay, CEA, Gif-sur-Yvette, France