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TY - CONF AU - Sakamoto, N. AU - Hara, H. AU - Kako, E. AU - Kamigaito, O. AU - Nakai, H. AU - Okihira, K. AU - Okuno, H. AU - Ozeki, K. AU - Sennyu, K. AU - Suda, K. AU - Umemori, K. AU - Watanabe, Y. AU - Yamada, K. AU - Yanagisawa, T. ED - Schaa, Volker RW ED - He, Yuan ED - Li, Lu ED - Zhao, Ning TI - Construction and Performance Tests of Prototype Quarter-wave Resonator and Its Cryomodule at RIKEN J2 - Proc. of SRF2017, Lanzhou, China, July 17-21, 2017 C1 - Lanzhou, China T2 - International Conference on RF Superconductivity T3 - 18 LA - english AB - This paper describes the development of a superconduct- ing quarter-wave resonator for use in an intense low-β-ion linear accelerator. The prototype cavity was fabricated from bulk Nb, inner cavity surface processing was per- formed, and vertical testing was carried out. In the vertical test, a Q-value of 8.7·10⁸ was obtained with an operating field gradient of 4.5 MV/m at a frequency of 75.5 MHz. Here, we describe the results of the performance tests and various phenomena we experienced during the tests. After the vertical tests, the helium vessel was assembled and the prototype resonator was integrated into a cryomodule. Initial cooldown testing results are described. Performance testing of the cryomodule is continuing. The situation of upgrade of the RIKEN heavy-ion RIKEN Linac (RILAC) is also reported. PB - JACoW CP - Geneva, Switzerland SP - 681 EP - 685 KW - ion KW - cavity KW - cryomodule KW - linac KW - multipactoring DA - 2018/01 PY - 2018 SN - 978-3-95450-191-5 DO - 10.18429/JACoW-SRF2017-WEYA02 UR - http://jacow.org/srf2017/papers/weya02.pdf ER -