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.
@article{arxiv.2306.17274,
title = {Multipacting Processing in Cryomodules For LCLS-II And LCLS-II-HE},
author = {A. Cravatta and T. Arkan and D. Bafia and J. Kaluzny and S. Posen and J. Vennekate and M. Drury and S. Aderhold and M. Checchin and D. Gonnella and J. Hogan and J. Maniscalco and J. Nelson and R. Porter and L. Zacarias},
journal= {arXiv preprint arXiv:2306.17274},
year = {2023}
}
Comments
21st Intl Conf Radio Frequency Superconductivity (SRF 2023)