A Design for 10 GeV, High Peak-Current, Tightly Focused Electron Beams at FACET-II

Glen White, Lindroos, Mats (Ed.), Seidel, Mike (Ed.), Pranke, Juliana (Ed.), Arduini, Gianluigi (Ed.), Schaa, Volker RW (Ed.)
2017
FACET-II will be a new test facility, starting construction in 2018 within the main SLAC Linac. Its purpose is to build on the decades-long experience developed conducting accelerator R&D at SLAC in the areas of advanced acceleration and coherent radiation techniques with high-energy electron and positron beams. The design consists of a 135-MeV high-brightness photo-injector constructed in an off-axis injection line in Sector 10 of the SLAC Linac, two new 4-bend chicane bunch compressors
more » ... compressors installed in Sectors 11 and 14, with a third compression stage provided by the existing FACET W Chicane in Sector 20. We develop a design to deliver peak currents more than 160 kA to the Sector 20 interaction region at 10 GeV, with 10 'm-rad emittances at 2 nC bunch charge and 1.4 % rms energy spread. The Sector 20 bunch compressor is re-designed for maximum peak current throughput and minimal emittance degradation via CSR, and the FACET-II compression scheme is optimized. We present 6D start-end beam tracking simulations using Lucretia including ISR, CSR, wakefields and space charge effects.
doi:10.18429/jacow-ipac2017-mopik115 fatcat:odo7kpwrm5hd5gytrsp7frzkqu