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RIS citation export for WEPA02: Beam Dynamics Studies on a Low Emittance Injector for LCLS-II-HE

AU  - Ji, F.
AU  - Adolphsen, C.
AU  - Coy, R.
AU  - Ge, L.
AU  - Mayes, C.E.
AU  - Qiang, J.
AU  - Raubenheimer, T.O.
AU  - Xiao, L.
ED  - Biedron, Sandra
ED  - Simakov, Evgenya
ED  - Milton, Stephen
ED  - Anisimov, Petr M.
ED  - Schaa, Volker R.W.
TI  - Beam Dynamics Studies on a Low Emittance Injector for LCLS-II-HE
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  - The SLAC High Energy upgrade of LCLS-II (LCLS-II-HE) will double the beam energy to 8 GeV, increasing the XFEL photon energy reach to about 13 keV. The energy reach can be extended to 20 keV if the beam emittance can be halved, which requires a higher gradient electron gun with a lower intrinsic emittance photocathode. To this end, the Low Emittance Injector (LEI) will be built that will run parallel to the existing LCLS-II Injector. The LEI design will be based on a state-of-the-art SRF gun with a 30 MV/m cathode gradient. The main goal is to produce transverse beam emittances of 0.1 mm-mrad for 100 pC bunch charges. This paper describes the beam dynamics studies on the design of the LEI including the simulations and multi-objective genetic algorithm (MOGA) optimizations. Performance with different injector layouts, cathode gradients, bunch charges and cathode mean transverse energies (MTEs) will be presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 619
EP  - 622
KW  - emittance
KW  - cathode
KW  - gun
KW  - solenoid
KW  - cavity
DA  - 2022/10
PY  - 2022
SN  - 2673-7000
SN  - 978-3-95450-232-5
DO  - doi:10.18429/JACoW-NAPAC2022-WEPA02
UR  - https://jacow.org/napac2022/papers/wepa02.pdf
ER  -