Author: Lee, W.W.
Paper Title Page
MOICNO02
Control of Electron Beam Longitudinal Phase Space With a Novel Compact De-chirper for PAL-XFEL  
 
  • H.-S. Kang, M.S. Chae, T. Ha, J.H. Hong, W.W. Lee, S.J. Park, H. Yang
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  The PAL-XFEL adopts a de-chirper system to remove the residual beam chirps with wakefield in corrugated pipes for the soft X-ray FEL line which is branched at 3 GeV point of the 10-GeV linac and does not have enough length of accelerating structures. The corrugated structure which is about 20 m long is designed to have the rectangular geometry and adjust the gap from 2 to 30 mm. We carried out the elegant code simulations using the wake formulas of G. Stupakov and K. Bane for the rectangular geometry to find the optimum parameters of corrugation using longitudinal wakes as well as to find the tolerance of vertical offset using transverse wakes. A 1-m long test de-chirper module is being designed and will be tested experimentally in July 2013 at the injector test facility in Pohang Accelerator Laboratory, which is a collaborative R&D with LBNL and SLAC.
Recommended by Zhirong Huang
 
slides icon Slides MOICNO02 [10.661 MB]