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TY - CONF AU - Konomi, T. AU - Adolphsen, C. AU - Gatzmaga, S. AU - Hartung, W. AU - Kelly, M.P. AU - Kim, S.H. AU - Lewellen, J.W. AU - Miller, S.J. AU - Morris, D.G. AU - Murcek, P. AU - Petersen, T.B. AU - Popielarski, J.T. AU - Saito, K. AU - Taylor, A. AU - Xiang, R. AU - Xu, T. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Design of the Cathode Stalk 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 - Superconducting radio-frequency (SRF) electron guns are attractive for delivery of beams at a high bunch repetition rate with a high accelerating field. An SRF gun is the most suitable injector for the high-energy upgrade of the Linac Coherent Light Source (LCLS-II-HE), which will produce high-energy X-rays at high repetition rate. An SRF gun is being developed for LCLS-II-HE as a collaborative effort by FRIB, HZDR, ANL, and SLAC. The cavity operating frequency is 185.7 MHz, and the target accelerating field at the photocathode is 30 MV/m. The photocathode is replaceable. The cathode is held by a fixture (’cathode stalk’) that is designed for thermal isolation and particle-free cathode exchange. The stalk must allow for precise alignment of the cathode position, cryogenic or room-temperature cathode operating temperature, and DC bias to inhibit multipacting. We are planning a test of the stalk to confirm that the design meets the requirements for RF power dissipation and biasing. In this presentation, we will describe the cathode stalk design and RF/DC stalk test plan. PB - JACoW Publishing CP - Geneva, Switzerland SP - 253 EP - 255 KW - cathode KW - cavity KW - gun KW - SRF KW - ISOL DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-MOPA87 UR - https://jacow.org/napac2022/papers/mopa87.pdf ER -