Design of a 185.7 MHz Superconducting RF Photoinjector Quarter-Wave Resonator for the LCLS-II-HE Low Emittance Injector

Kim, Sang-Hoon; Adolphsen, Chris; Ge, Lixin; Hartung, Walter; Ji, Fuhao; Kelly, Michael; Konomi, Taro; Lewellen, John; Miller, Samuel; Patil, Mohit; Petersen, Troy; Piot, Philippe; Popielarski, John; Saito, Kenji; Xiao, Liling; Xu, Ting; Xu, Tracy

doi:10.18429/JACoW-NAPAC2022-MOPA85

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RIS citation export for MOPA85: Design of a 185.7 MHz Superconducting RF Photoinjector Quarter-Wave Resonator for the LCLS-II-HE Low Emittance Injector

TY  - CONF
AU  - Kim, S.H.
AU  - Adolphsen, C.
AU  - Ge, L.
AU  - Hartung, W.
AU  - Ji, F.
AU  - Kelly, M.P.
AU  - Konomi, T.
AU  - Lewellen, J.W.
AU  - Miller, S.J.
AU  - Patil, M.S.
AU  - Petersen, T.B.
AU  - Piot, P.
AU  - Popielarski, J.T.
AU  - Saito, K.
AU  - Xiao, L.
AU  - Xu, T.
ED  - Biedron, Sandra
ED  - Simakov, Evgenya
ED  - Milton, Stephen
ED  - Anisimov, Petr M.
ED  - Schaa, Volker R.W.
TI  - Design of a 185.7 MHz Superconducting RF Photoinjector Quarter-Wave Resonator for the LCLS-II-HE Low Emittance Injector
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  - A 185.7 MHz superconducting quarter-wave resonator (QWR) was designed for the low emittance injector of the Linac Coherent Light Source high energy upgrade (LCLS-II-HE). The cavity was designed to minimize the risk of cathode efficiency degradation due to multipacting or field emission and to operate with a high RF electric field at the cathode for low electron-beam emittance. Cavity design features include: (1) shaping of the cavity wall to reduce the strength of the low-field coaxial multipacting barrier; (2) four ports for electropolishing and high-pressure water rinsing; and (3) a fundamental power coupler (FPC) port located away from the accelerating gap. The design is oriented toward minimizing the risk of particulate contamination and avoid harmful dipole components in the RF field. The ANL 162 MHz FPC design for PIP-II is being adapted for the gun cavity. We will present the RF design of the cavity integrated with the FPC.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 245
EP  - 248
KW  - cavity
KW  - SRF
KW  - gun
KW  - cathode
KW  - electron
DA  - 2022/10
PY  - 2022
SN  - 2673-7000
SN  - 978-3-95450-232-5
DO  - doi:10.18429/JACoW-NAPAC2022-MOPA85
UR  - https://jacow.org/napac2022/papers/mopa85.pdf
ER  -