Title :
Relative bunch length monitor for the Linac Coherent Light Source (LCLS) using coherent edge radiation
Author :
Loos, H. ; Borden, T. ; Emma, P. ; Frisch, J. ; Wu, J.
Author_Institution :
SLAC, Menlo Park
Abstract :
The ultra-short bunches of the electron beam for LCLS are generated in two 4-dipole bunch compressors located at energies of 250 MeV and 4.3 GeV. Although an absolute measurement of the bunch length can be done by using a transverse deflecting cavity in an interceptive mode, a non-interceptive single shot method is needed as a relative measurement of the bunch length used in the continuous feedback for beam energy and peak current. We report on the design and implementation of two monitors measuring the integrated power of coherent edge radiation from the last dipole in each chicane.
Keywords :
accelerator cavities; beam handling techniques; electron beams; light sources; linear accelerators; particle beam bunching; particle beam diagnostics; LCLS; beam energy; coherent edge radiation; dipole bunch compressors; electron beam; electron volt energy 250 MeV; electron volt energy 4.3 GeV; linac coherent light source; noninterceptive single shot method; relative bunch length monitor; transverse deflecting cavity; Compressors; Current measurement; Electron beams; Energy measurement; Feedback; Length measurement; Light sources; Linear particle accelerator; Power measurement; Radiation monitoring;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440076
