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Title: Coherent infrared radiation from the ALS generated via femtosecond laser modulation of the electron beam

Abstract

Interaction of an electron beam with a femtosecond laser pulse co-propagating through a wiggler at the ALS produces large modulation of the electron energies within a short {approx}100 fs slice of the electron bunch. Propagating around the storage ring, this bunch develops a longitudinal density perturbation due to the dispersion of electron trajectories. The length of the perturbation evolves with a distance from the wiggler but is much shorter than the electron bunch length. This perturbation causes the electron bunch to emit short pulses of temporally and spatially coherent infrared light which are automatically synchronized to the modulating laser. The intensity and spectra of the infrared light were measured in two storage ring locations for a nominal ALS lattice and for an experimental lattice with the higher momentum compaction factor. The onset of instability stimulated by laser e-beam interaction had been discovered. The infrared signal is now routinely used as a sensitive monitor for a fine tuning of the laser beam alignment during data accumulation in the experiments with femtosecond x-ray pulses.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director. Office of Science. Office of High Energy and Nuclear Physics. Division of High Energy Physics (US)
OSTI Identifier:
836045
Report Number(s):
LBNL-55688; CBP Note - 572
R&D Project: 455301; TRN: US0500458
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 9th Biennial European Particle Accelerator Conference, EPAC'04, Lucerne (CH), 07/05/2004--07/09/2004; Other Information: PBD: 1 Jul 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATORS; ALIGNMENT; ELECTRON BEAMS; ELECTRONS; INFRARED RADIATION; INSTABILITY; LASERS; MODULATION; MONITORS; SPECTRA; STORAGE RINGS; TRAJECTORIES; TUNING

Citation Formats

Byrd, J.M., Hao, Z., Martin, M.C., Robin, D.S., Sannibale, F., Schoenlein, R.W., Venturini, M., Zholents, A.A., and Zolotorev, M.S.. Coherent infrared radiation from the ALS generated via femtosecond laser modulation of the electron beam. United States: N. p., 2004. Web.
Byrd, J.M., Hao, Z., Martin, M.C., Robin, D.S., Sannibale, F., Schoenlein, R.W., Venturini, M., Zholents, A.A., & Zolotorev, M.S.. Coherent infrared radiation from the ALS generated via femtosecond laser modulation of the electron beam. United States.
Byrd, J.M., Hao, Z., Martin, M.C., Robin, D.S., Sannibale, F., Schoenlein, R.W., Venturini, M., Zholents, A.A., and Zolotorev, M.S.. Thu . "Coherent infrared radiation from the ALS generated via femtosecond laser modulation of the electron beam". United States. doi:. https://www.osti.gov/servlets/purl/836045.
@article{osti_836045,
title = {Coherent infrared radiation from the ALS generated via femtosecond laser modulation of the electron beam},
author = {Byrd, J.M. and Hao, Z. and Martin, M.C. and Robin, D.S. and Sannibale, F. and Schoenlein, R.W. and Venturini, M. and Zholents, A.A. and Zolotorev, M.S.},
abstractNote = {Interaction of an electron beam with a femtosecond laser pulse co-propagating through a wiggler at the ALS produces large modulation of the electron energies within a short {approx}100 fs slice of the electron bunch. Propagating around the storage ring, this bunch develops a longitudinal density perturbation due to the dispersion of electron trajectories. The length of the perturbation evolves with a distance from the wiggler but is much shorter than the electron bunch length. This perturbation causes the electron bunch to emit short pulses of temporally and spatially coherent infrared light which are automatically synchronized to the modulating laser. The intensity and spectra of the infrared light were measured in two storage ring locations for a nominal ALS lattice and for an experimental lattice with the higher momentum compaction factor. The onset of instability stimulated by laser e-beam interaction had been discovered. The infrared signal is now routinely used as a sensitive monitor for a fine tuning of the laser beam alignment during data accumulation in the experiments with femtosecond x-ray pulses.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 2004},
month = {Thu Jul 01 00:00:00 EDT 2004}
}

Conference:
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