A measurement of high gain SASE FEL induced electron beam micro-bunching using coherent transition radiation

Author

Tremaine, A. ; Anderson, S. ; Frigola, P. ; Hogan, M. ; Murokh, A. ; Pellegrini, C. ; Rosenzweig, J. ; Nguyen, D. ; Sheffield, R.

Author_Institution

California Univ., Los Angeles, CA, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

217

Abstract

Coherent transition radiation (CTR) was used to study the longitudinal modulations of an electron beam exiting the UCLA/LANL high gain SASE FEL. The induced longitudinal micro-bunching of the electron beam at the exit of the undulator was measured with a frequency domain technique using the CTR emitted when this beam strikes a thin conducting foil. Formalisms for both CTR and SASE theories are related using the simulation code GINGER in which the SASE FEL gain of the output radiation and the micro-bunching of the electron beam are given. Experimental results from the CTR measurement will show the limit of standard transition radiation theory is being approached and new analysis is needed

Keywords

free electron lasers; particle beam bunching; particle beam diagnostics; superradiance; transition radiation; GINGER; coherent transition radiation; frequency domain technique; high gain SASE FEL induced electron beam micro-bunching; longitudinal micro-bunching; longitudinal modulations; output radiation; thin conducting foil; Electron beams; Frequency domain analysis; Frequency measurement; Gain measurement; Laboratories; Measurement standards; Optical modulation; Time measurement; Undulators; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795668

Filename

795668