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TY - CONF AU - Huque, N.A. AU - Daly, E. AU - Wijeratne, T. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Upgrades to Cryogenic Capabilities for Cryomodule Testing at JLab 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 cryogenic facilities for cryomodule testing at Jefferson Lab (JLab) have been modified and to enable testing of Linear Coherent Light Source-II (LCLS-II) cryomodules. Temporary changes in u-tube connections at the Cryogenic Test Facility (CTF) has enabled rates of cavity cooling that are a factor of 10 higher than previously achieved. Cryogenic connections at JLab¿s Low Energy Recirculator Facility (LERF) have been repurposed to enable two LCLS-II cryomodules to be tested in series. This testing shares the helium space with the Central Helium Liquefier (CHL) that is also used by the Continuous Electron Beam Accelerator Facility (CEBAF). Cryomodule testing can occur while beam operation is ongoing at CEBAF. Improvements to these facilities have allowed the testing of the JLab¿s highest ever performing cryomodules. PB - JACoW Publishing CP - Geneva, Switzerland SP - 983 EP - 987 KW - cryomodule KW - cavity KW - cryogenics KW - operation KW - HOM DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP051 UR - http://jacow.org/srf2019/papers/thp051.pdf ER -