FEL Gain Length and Taper Measurements at LCLS

Conference · Fri Jul 30 04:00:00 EDT 2010

OSTI ID:984330

Ratner, Daniel; Brachmann, A.; Decker, F. J.; Ding, Y.; Dowell, D.; Emma, P.; Frisch, J.; Gilevich, S.; Hays, G.; Hering, P.; Huang, Z.; Iverson, R.; Loos, H.; Miahnahri, A.; Nuhn, H. D.; Turner, J.; Welch, J.; White, W.; Wu, J.; Xiang, D. ; Yocky, G.

We present experimental studies of the gain length and saturation power level from 1.5 nm to 1.5 {angstrom} at the Linac Coherent Light Source (LCLS). By disrupting the FEL process with an orbit kick, we are able to measure the X-ray intensity as a function of undulator length. This kick method is cross-checked with the method of removing undulator sections. We also study the FEL-induced electron energy loss after saturation to determine the optimal taper of the undulator K values. The experimental results are compared to theory and simulations.

• Research Organization: SLAC National Accelerator Laboratory (SLAC)
• Sponsoring Organization: US DOE Office of Science (DOE SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 984330
• Report Number(s): SLAC-PUB-14194
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
Accelerators
ACCPHY
XFEL
ELECTRONS
FREE ELECTRON LASERS
LIGHT SOURCES
LINEAR ACCELERATORS
SATURATION
WIGGLER MAGNETS