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 - Ciovati, G. AU - Cheng, G. AU - Daly, E. AU - Davis, G.K. AU - Drury, M.A. AU - Fischer, J.F. AU - Forehand, D. AU - Macha, K. AU - Marhauser, F. AU - McEwen, E.A. AU - Mitchell, A.L.A. AU - Reilly, A.V. AU - Rimmer, R.A. AU - Wang, S. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Cavity Production and Testing of the First C75 Cryomodule for CEBAF J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021 CY - East Lansing, MI, USA T2 - International Conference on RF Superconductivity T3 - 20 LA - english AB - The CEBAF cryomodule rework program was updated over the last few years to increase the energy gain of refurbished cryomodules to 75 MeV. The concept recycles the waveguide end-groups from original CEBAF cavities fabricated in the 1990s and replaces the five elliptical cells in each with a new optimized cell shape fabricated from large-grain, ingot Nb material. Eight cavities were fabricated at Research Instruments, Germany, and two cavities were built at Jefferson Lab. Each cavity was processed by electropolishing and tested at 2.07 K. The best eight cavities were assembled into ’cavity pairs’ and re-tested at 2.07 K, before assembly into the cryomodule. All but one cavity in the cryomodule were within 10% of the target accelerating gradient of 19 MV/m with a quality factor of 8·10⁹. The performance limitations were field emission and multipacting. PB - JACoW Publishing CP - Geneva, Switzerland SP - 250 EP - 254 KW - cavity KW - cryomodule KW - GUI KW - operation KW - HOM DA - 2022/10 PY - 2022 SN - 2673-5504 SN - 978-3-95450-233-2 DO - doi:10.18429/JACoW-SRF2021-MOPCAV001 UR - https://jacow.org/srf2021/papers/mopcav001.pdf ER -