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TY - CONF AU - Kawamura, M. AU - Akemoto, M. AU - Akikawa, H. AU - Endo, O. AU - Fukuda, S. AU - Honma, H. AU - Michizono, S. AU - Nakajima, H. AU - Natsui, T. AU - Sato, K. AU - Shidara, T. ED - Pei, Guoxi ED - Schaa, Volker RW ED - Chin, Yong Ho ED - Fu, Shinian ED - Zhao, Ning TI - Present Status of Capacitor-charging Power Supplies for Klystron Modulators in SuperKEKB Injector Linac J2 - Proc. of LINAC2018, Beijing, China, 16-21 September 2018 CY - Beijing, China T2 - Linear Accelerator Conference T3 - 29 LA - english AB - The capacitor-charging power supplies (CCPSs) for the klystron modulators have been developed from 2002 in the SuperKEKB injector linac. The specifications are that the output voltage is 43kV, the charging power is 30kJ/s, and the output voltage stability is 0.2%p-p. Being used in the old facility, their sizes are restricted in 480mm x 680 mm x 760mm. After various modifications, the 13 CCPSs in the linac have been operated with no fault since last October. The present status of the CCPSs, including the outlines, specifications, and the modifications against the faults, are described. PB - JACoW Publishing CP - Geneva, Switzerland SP - 898 EP - 900 KW - linac KW - klystron KW - status KW - power-supply KW - controls DA - 2019/01 PY - 2019 SN - 2226-0366 SN - 978-3-95450-194-6 DO - DOI: 10.18429/JACoW-LINAC2018-THPO095 UR - http://jacow.org/linac2018/papers/thpo095.pdf ER -