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 - Cravatta, A.T. AU - Aderhold, S. AU - Arkan, T.T. AU - Bafia, D. AU - Checchin, M. AU - Drury, M.A. AU - Gonnella, D. AU - Hogan, J. AU - Kaluzny, J.A. AU - Maniscalco, J.T. AU - Nelson, J. AU - Porter, R.D. AU - Posen, S. AU - Vennekate, H. AU - Zacarias, L.M. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Schaa, Volker R.W. ED - Thomas, Paul W. TI - Multipacting Processing in Cryomodules for LCLS-II and LCLS-II-HE J2 - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023 CY - Grand Rapids, MI, USA T2 - International Conference on RF Superconductivity T3 - 21 LA - english AB - Multipacting (MP) is a phenomenon which can affect stability in particle accelerators and limit performance in superconducting radio frequency cavities. In the TESLA shaped, 1.3 GHz, 9-cell cavities used in the LCLS-II (L2) and LCLS-II-HE (HE) projects, the MP-band (~17-24 MV/m) lies within the required accelerating gradients. For HE, the operating gradient of 20.8 MV/m lies well within the MP-band and cryomodule testing has confirmed that this is an issue. As such, MP processing for the HE cryomodule test program will be discussed. Early results on MP processing in cryomodules installed in the L2 linac will also be presented, demonstrating that the methods used in cryomodule acceptance testing are also successful at conditioning MP in the accelerator and that this processing is preserved in the mid-term. PB - JACoW Publishing CP - Geneva, Switzerland SP - 259 EP - 262 KW - cavity KW - cryomodule KW - linac KW - radiation KW - multipactoring DA - 2023/09 PY - 2023 SN - 2673-5504 SN - 978-3-95450-234-9 DO - doi:10.18429/JACoW-SRF2023-MOPMB063 UR - https://jacow.org/srf2023/papers/mopmb063.pdf ER -