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TY - CONF AU - Ota, T. AU - Kako, E. AU - Konomi, T. AU - Miyamoto, A. AU - Nakamura, S. AU - Sakai, H. AU - Sato, K. AU - Takasaki, M. AU - Umemori, K. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Development of HOM Absorbers for CW Superconducting Cavities in Energy Recovery Linac J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - Higher Order Modes (HOM) absorbers for superconducting cavities have been developing at TOSHIBA in collaboration with High Energy Accelerator Research Organization (KEK) since 2015. A new prototype HOM absorber for 1.3 GHz 9-cell superconducting cavity was fabricated. An AlN lossy dielectrics cylinder was brazed with a thin copper plate, and the cool-down tests by nitrogen gas was carried out. The copper plate and a copper cylinder were joined by electron beam welding. SUS flanges were electron beam welded to both ends of the copper cylinder to fabricate a whole prototype HOM absorber. Fabrication process of the prototype HOM absorber will be presented in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1060 EP - 1062 KW - HOM KW - cavity KW - superconducting-cavity KW - linac KW - SRF DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP072 UR - http://jacow.org/srf2019/papers/thp072.pdf ER -