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

fYear

2007

fDate

25-29 June 2007

Firstpage

4189

Lastpage

4191

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440076

Filename

4440076