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SLAC Publication: SLAC-PUB-16482
SLAC Release Date: January 18, 2017
Radiation Safety Studies for LCLS-II Experiment Systems
Xiao, Shanjie.
The LCLS-II (Linear Coherent Light Source II) is the upgrade of the current LCLS x-ray free-electron laser (FEL) facility at SLAC. The LCLS-II will deploy new superconducting Linac systems for up to MHz and MW electron beams and new variable gap undulators. Despite the challenges from MW electron beams, the upgraded FEL parameters will also bring challenges to the radiation safety of the experiment systems. The existing radiation safety systems, including shielding, beam containment and access c... Show Full Abstract
The LCLS-II (Linear Coherent Light Source II) is the upgrade of the current LCLS x-ray free-electron laser (FEL) facility at SLAC. The LCLS-II will deploy new superconducting Linac systems for up to MHz and MW electron beams and new variable gap undulators. Despite the challenges from MW electron beams, the upgraded FEL parameters will also bring challenges to the radiation safety of the experiment systems. The existing radiation safety systems, including shielding, beam containment and access control, of the experiment systems were designed for W-level FEL up to 12 keV fundamental. The LCLS-II will raise the x-ray fundamental energy to 25 keV (at 120 Hz) on one side and deliver up to 200 W FEL (up to 5 keV at 120 kHz) on the other side. This paper shows studies for the electron beam containment for experiment area, and the radiation shielding design under the upgraded LCLS-II beam parameters. Show Partial Abstract