The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Sievers, S. AU - Krupka, N. AU - Reschke, D. AU - Saegebarth, S. AU - Schaffran, J. AU - Schalwat, M. AU - Schilling, P. AU - Schmökel, M. AU - Steinhau-Kühl, N. AU - Vogel, E. AU - Weise, H. AU - Wiencek, M. AU - van der Horst, B. ED - Pei, Guoxi ED - Schaa, Volker RW ED - Chin, Yong Ho ED - Fu, Shinian ED - Zhao, Ning TI - Retreatment of European XFEL Series Cavities at DESY as Part of the Repair of European XFEL Accelerating Modules J2 - Proc. of LINAC2018, Beijing, China, 16-21 September 2018 CY - Beijing, China T2 - Linear Accelerator Conference T3 - 29 LA - english AB - For the European XFEL 10² accelerating modules were built and tested. Several accelerating modules had to be reworked due to different kinds of non-conformities. The extent of this rework varied greatly. At the end of production four accelerating modules could not be qualified in time before the tunnel installation was to be finished in September 2016. Meanwhile the cavity strings of two of these accelerating modules have been disassembled in the DESY clean room. The cavities have been retreated at DESY either by additional high pressure water rinsing or BCP flash chemical treatment. All cavities were vertically tested and 15 out of 16 were qualified for the reassembly of the cavity strings. One accelerating module will be reassembled completely and tested until the end of 2018; the other will follow in the first half of 2019. We report on retreatment procedures and performance of these cavities. PB - JACoW Publishing CP - Geneva, Switzerland SP - 384 EP - 387 KW - cavity KW - FEL KW - vacuum KW - SRF KW - linac DA - 2019/01 PY - 2019 SN - 2226-0366 SN - 978-3-95450-194-6 DO - DOI: 10.18429/JACoW-LINAC2018-TUPO028 UR - http://jacow.org/linac2018/papers/tupo028.pdf ER -