JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Contreras-Martinez, C. AU - Arkan, T.T. AU - Cravatta, A.T. AU - Hartsell, B.D. AU - Kaluzny, J.A. AU - Khabiboulline, T.N. AU - Pischalnikov, Y.M. AU - Posen, S. AU - Romanov, G.V. AU - Yun, J.C. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Tests of the Extended Range SRF Cavity Tuners for the LCLS-II HE Project J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - The LCLS-II HE superconducting linac will produce multi-energy beams by supporting multiple undulator lines simultaneously. This could be achieved by using the cavity SRF tuner in the off-frequency detune mode. This off-frequency operation method was tested in the verification cryomodule (vCM) and CM 1 at Fermilab at 2 K. In both cases, the tuners achieved a frequency shift of -565±80 kHz. This study will discuss cavity frequency during each step as it is being assembled in the cryomodule string and finally when it is being tested at 2 K. Tracking the cavity frequency helped enable the tuners to reach this large frequency shift. The specific procedures of tuner setting during assembly will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 100 EP - 102 KW - cavity KW - operation KW - cryomodule KW - SRF KW - vacuum DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-MOPA23 UR - https://jacow.org/napac2022/papers/mopa23.pdf ER -