Electro-optic longitudinal electron beam diagnostic at SDL

Author

Loos, H. ; Doyuran, A. ; Murphy, J.B. ; Rose, J. ; Shaftan, T. ; Sheehy, B. ; Shen, Y. ; Skaritka, J. ; Wang, X.J. ; Wu, Z. ; Yu, L.H.

Author_Institution

BNL, Upton, NY, USA

Volume

4

fYear

2003

fDate

12-16 May 2003

Firstpage

2455

Abstract

The linac at the NSLS Source Development Lab (SDL) provides a high brightness electron beam for the DUV-FEL project with subpicosecond bunch length and several hundred Amperes peak current by means of a photoinjector and a magnetic bunch compressor. Previous diagnostics of the longitudinal bunch dynamics relied on the rf zero-phasing method and measurements of CTR spectra. In order to have a fast and nonintercepting longitudinal diagnostic available, the electro-optic measurement technique has been implemented with its major component, a synchronized 100 fs Ti:sapphire laser coaligned with the electron beam, already in place as a seed for the FEL. The theoretical temporal resolution for a 100 μm thick ZnTe crystal is limited to about 200 fs and the signal contrast to more than 1%. We present preliminary results of multishot scanning measurements and the single-shot diagnostics of the bunch shape as well as its application as a rf-laser jitter monitor.

Keywords

electro-optical effects; electron accelerators; free electron lasers; linear accelerators; particle beam bunching; particle beam diagnostics; particle beam dynamics; particle beam injection; ultraviolet sources; CTR spectra; DUV-FEL project; NSLS Source Development Lab; ZnTe crystal; bunch shape; electro-optic longitudinal electron beam diagnostic; linac; longitudinal bunch dynamics; magnetic bunch compressor; multishot scanning measurements; peak current; photoinjector; rf zero-phasing method; rf-laser jitter monitor; single-shot diagnostics; subpicosecond bunch length; synchronized Ti:sapphire laser; temporal resolution; Brightness; Electron beams; Jitter; Laser theory; Lasers and electrooptics; Linear particle accelerator; Measurement techniques; Shape measurement; Signal resolution; Zinc compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289152

Filename

1289152