Keyword: acceleration
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WEP043 Multi-Energy Operation Analysis in a Superconducting Linac Based on off-Frequency Detune Method linac, SRF, undulator, electron 416
  • Z. Zhang, C. Adolphsen, Y. Ding, T.O. Raubenheimer
    SLAC, Menlo Park, California, USA
  The free-electron laser facilities driven by a superconducting radio-frequency (SRF) linac provide high-repetition-rate electron beam, which makes it feasible to feed multiple undulator lines at the same time. In this paper, we study a method of controlling the beam energy of multiple electron bunches by off-frequency detuning of the SRF linac. Based on the theoretical analysis, we present the optimal solutions of the method and the strategy to allocate linac energy for each possible off-frequency detune. The initial acceleration phases before detuning of the SRF linac can be optimized to reduce the necessary SRF linac energy overhead. We adopt the LCLS-II-HE configuration as an example to discuss possible schemes for two undulator lines.  
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About • paper received ※ 20 August 2019       paper accepted ※ 27 August 2019       issue date ※ 05 November 2019  
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