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TY - CONF AU - Krupka, N. AU - Bate, C. AU - Reschke, D. AU - Saegebarth, S. AU - Schalwat, M. AU - Schilling, P. AU - Sievers, S. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Particulate Sampling and Analysis During Refurbishment of Prototype European XFEL Cryomodule 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 - The cryomodule PXFEL3₁ is one of three prototype cryomodules for the European XFEL. In preparation of the series module assembly it was used for the qualification of infrastructure and personnel at CEA Saclay. After transport and tests at DESY the cryomodule was stored for several years. Last year we decided to refurbish this module with new cavities for the installation in the FLASH accelerator. During the disassembly of the cavity string in the clean room at DESY we took several particulate samples for analysis. Optical and laser optical microscopy give us an insight on the quantity and type of the particulates. We expect to get hints where the particulates come from and how they are transported through the cavity string during transport and operation. PB - JACoW Publishing CP - Geneva, Switzerland SP - 701 EP - 704 KW - cavity KW - FEL KW - SRF KW - cryomodule KW - superconductivity DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-TUP099 UR - http://jacow.org/srf2019/papers/tup099.pdf ER -