Speaker
Franz-Josef Decker
(SLAC National Accelerator Laboratory)
Description
The energy of the beam is 5 to 10 times more stable than the beam powered by the LCLS Copper Linac due to the continuous wave (CW) operation of the superconducting (SC) Linac. Transversely, we have identified Injector Laser movements on the cathode of RF Gun (low frequency to a few Hz). Some 60 Hz lines from spreader kicker were seen and corrected by timing adjustments of the kicker pulse. Intensity wise we have seen a low frequency component which might be related to the transverse Laser motion, but also a higher frequency line of "1690 Hz" which seemed to be aliased down from a much higher frequency. Data are shown and discussed with mitigation results and plans.
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Authors
Andy Benwell
(SLAC National Accelerator Laboratory)
Christopher Zimmer
(SLAC National Accelerator Laboratory)
David Cesar
(SLAC National Accelerator Laboratory)
Franz-Josef Decker
(SLAC National Accelerator Laboratory)
Shamin Chowdhury
(SLAC National Accelerator Laboratory)
William Colocho
(SLAC National Accelerator Laboratory)
Yuantao Ding
(SLAC National Accelerator Laboratory)