JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{yin:srf2023-wepwb113,
author = {Z.Y. Yin and W. Hartung and S.H. Kim and T. Konomi and T. Xu},
title = {{Evaluation of Photo-Cathode Port Multipacting in the SRF Photo-Injector Cryomodule for the LCLS-II High-Energy Upgrade}},
% booktitle = {Proc. SRF'23},
booktitle = {Proc. 21th Int. Conf. RF Supercond. (SRF'23)},
pages = {859--862},
eid = {WEPWB113},
language = {english},
keywords = {cathode, simulation, electron, SRF, experiment},
venue = {Grand Rapids, MI, USA},
series = {International Conference on RF Superconductivity},
number = {21},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {09},
year = {2023},
issn = {2673-5504},
isbn = {978-3-95450-234-9},
doi = {10.18429/JACoW-SRF2023-WEPWB113},
url = {https://jacow.org/srf2023/papers/wepwb113.pdf},
abstract = {{The high-energy upgrade of the Linac Coherent Light Source (LCLS-II-HE) will increase the photon energy and brightness. A low-emittance injector (LEI) was proposed to increase the photon flux for high X-ray energies. FRIB, HZDR, Argonne, and SLAC are developing a 185.7 MHz superconducting radio-frequency photo-injector (SRF-PI) cryomodule for the LEI. The photo-cathode system requirements are challenging, as cathodes must be maintained at the desired temperature, precisely aligned, and operated without multipacting (MP); to avoid field emission, cathode exchange must be particulate-free. A support stalk has been designed to hold the cathode in position under these requirements. A DC bias is used to inhibit MP. We simulated MP for various surface conditions and bias levels. An RF/DC test was developed to evaluate the cathode stalk performance as a subsystem and to identify and correct issues before assembly into the full cryomodule. The RF/DC test makes use of a resonant coaxial line to generate an RF magnetic field similar to that of the cathode-in-SRF-PI-cavity case. High-power test results will be presented and compared to the MP simulations.}},
}