Measurements and Modeling of Coherent Synchrotron Radiation and its Impact on the LCLS Electron Beam

Journal Article · Thu Dec 18 00:00:00 EST 2008 · Submitted to Phys. Rev. ST Accel. Beams

OSTI ID:944552

Bane, K L.F.; Decker, F -J; Ding, Y; Dowell, D; Emma, P; Frisch, J; Huang, Z; Iverson, R; Limborg-Deprey, C; Loos, H; Nuhn, H -D; Ratner, D; Stupakov, G; Turner, J; Welch, J; Wu, J

In order to reach the high peak current required for an x-ray free electron laser, two separate magnetic dipole chicanes are used in the Linac Coherent Light Source (LCLS) accelerator to compress the electron bunch length in stages. In these bunch compressors, coherent synchrotron radiation (CSR) can be emitted either by a short electron bunch or by any longitudinal density modulation that may be on the bunch. In this paper, we report detailed measurements of the CSR-induced energy loss and transverse emittance growth in these compressors. Good agreement is found between the experimental results and multi-particle tracking studies. We also describe direct observations of CSR at optical wavelengths and compare with analytical models based on beam microbunching.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 944552
• Report Number(s): SLAC-PUB-13484
• Journal Information: Submitted to Phys. Rev. ST Accel. Beams, Journal Name: Submitted to Phys. Rev. ST Accel. Beams
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
Accelerators
Other
ACCPHY
XFEL
COMPRESSORS
ELECTRON BEAMS
ELECTRONS
FREE ELECTRON LASERS
LIGHT SOURCES
LINEAR ACCELERATORS
MAGNETIC DIPOLES
MODULATION
SIMULATION
SYNCHROTRON RADIATION
WAVELENGTHS