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@inproceedings{petrushina:ipac2021-wepab138,
author = {I. Petrushina and S.A. Belomestnykh and J.C. Brutus and J.M. Grames and P. Inacker and Y.C. Jing and S. Kazakov and T.N. Khabiboulline and V. Litvinenko and M. Martinello and Y.M. Pischalnikov and M. Poelker and J. Skaritka and R. Suleiman and E.J-M. Voutier and E. Wang and V.P. Yakovlev},
% author = {I. Petrushina and S.A. Belomestnykh and J.C. Brutus and J.M. Grames and P. Inacker and Y.C. Jing and others},
% author = {I. Petrushina and others},
title = {{Superconducting RF Gun with High Current and the Capability to Generate Polarized Electron Beams}},
booktitle = {Proc. IPAC'21},
pages = {2936--2938},
eid = {WEPAB138},
language = {english},
keywords = {gun, SRF, electron, cathode, cavity},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB138},
url = {https://jacow.org/ipac2021/papers/wepab138.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB138},
abstract = {{High-current low-emittance CW electron beams are indispensable for nuclear and high-energy physics fixed target and collider experiments, cooling high energy hadron beams, generating CW beams of monoenergetic X-rays (in FELs) and gamma-rays (in Compton sources). Polarization of electrons in these beams provides extra value by opening a new set of observables and frequently improving the data quality. We report on the upgrade of the unique and fully functional CW SRF 1.25 MeV SRF gun, built as part of the Coherent electron Cooling (CeC) project, which has demonstrated sustained CW operation with CsK2Sb photocathodes generating electron bunches with record-low transverse emittances and record-high bunch charge exceeding 10 nC. We propose to extend the capabilities of this system to high average current of 100 milliampere in two steps: increasing the current 30-fold at each step with the goal to demonstrate reliable long-term operation of the high-current low-emittance CW SRF guns. We also propose to test polarized GaAs photocathodes in the ultra-high vacuum (UHV) environment of the SRF gun, which has never been successfully demonstrated in RF accelerators.}},
}