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Title: PROCEEDING OF THE SEEDED X-RAY FREE ELECTRON LASER WORKSHOP.

Abstract

The underlying theory of a high gain free electron laser (FEL) has existed for two decades [1-2], but it is only in the last few years that these novel radiation sources have been realized experimentally. Several high gain FELs have successfully reached saturation in the infrared, visible and the VUV portion of the spectrum: the High Gain Harmonic Generation (HGHG) free electron lasers [3] at BNL and the Self Amplified Spontaneous Emission (SASE) FELs at LEUTL, VISA and TTF [4-6]. The outstanding challenges for future FELs are to extend high gain FELs to the X-ray regime, improve the longitudinal coherence of the radiation using seeded FEL schemes and generate ultrashort pulses (<100 fs). The National Synchrotron Light Source (NSLS) of the Brookhaven National Laboratory (BNL) sponsored a Seeded X-ray Free Electron Laser Workshop on December 13-14, 2002 to explore these challenging issues. Representatives from BNL, DESY, LBNL, SLAC and UCLA made presentations on the novel schemes under consideration at their laboratories. Workshop participants had a lively discussion on the feasibility, performance and R&D issues associated with the seeded XFEL schemes. An improvement of the electron beam quality will certainly be necessary to drive the XFEL. Self-seeding SASE, cascaded HGHG, andmore » SASE pulse compression FELs show the most promise for producing short pulse X-rays. Of these, only the self-seeded and HGHG schemes generate longitudinally coherent radiation. While the pulse length in the self-seeded scheme is determined by the electron bunch length ({approx}100 fs), the pulse length in the HGHG scheme is determined by the short pulse seed laser, and so can be much shorter ({approx} 20 fs).« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
808633
Report Number(s):
BNL-71044-2003
R&D Project: LS1; KC0204011; TRN: US0302330
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Technical Report
Resource Relation:
Other Information: Proceedings of the seeded x-ray free electron laser workshop, Upton, NY (US); 12/13/2002--12/14/2002; PBD: 13 Dec 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; COHERENT RADIATION; COMPRESSION; ELECTRON BEAMS; ELECTRONS; FREE ELECTRON LASERS; HARMONIC GENERATION; NSLS; PERFORMANCE; RADIATION SOURCES; RADIATIONS; SATURATION; STANFORD LINEAR ACCELERATOR CENTER

Citation Formats

WANG,X.J., MURPHY,J.B., YU,L.H., FAATZ,B., HUANG,Z., REICHE,S., and ZOLOTOREV,M. PROCEEDING OF THE SEEDED X-RAY FREE ELECTRON LASER WORKSHOP.. United States: N. p., 2002. Web. doi:10.2172/808633.
WANG,X.J., MURPHY,J.B., YU,L.H., FAATZ,B., HUANG,Z., REICHE,S., & ZOLOTOREV,M. PROCEEDING OF THE SEEDED X-RAY FREE ELECTRON LASER WORKSHOP.. United States. doi:10.2172/808633.
WANG,X.J., MURPHY,J.B., YU,L.H., FAATZ,B., HUANG,Z., REICHE,S., and ZOLOTOREV,M. Fri . "PROCEEDING OF THE SEEDED X-RAY FREE ELECTRON LASER WORKSHOP.". United States. doi:10.2172/808633. https://www.osti.gov/servlets/purl/808633.
@article{osti_808633,
title = {PROCEEDING OF THE SEEDED X-RAY FREE ELECTRON LASER WORKSHOP.},
author = {WANG,X.J. and MURPHY,J.B. and YU,L.H. and FAATZ,B. and HUANG,Z. and REICHE,S. and ZOLOTOREV,M.},
abstractNote = {The underlying theory of a high gain free electron laser (FEL) has existed for two decades [1-2], but it is only in the last few years that these novel radiation sources have been realized experimentally. Several high gain FELs have successfully reached saturation in the infrared, visible and the VUV portion of the spectrum: the High Gain Harmonic Generation (HGHG) free electron lasers [3] at BNL and the Self Amplified Spontaneous Emission (SASE) FELs at LEUTL, VISA and TTF [4-6]. The outstanding challenges for future FELs are to extend high gain FELs to the X-ray regime, improve the longitudinal coherence of the radiation using seeded FEL schemes and generate ultrashort pulses (<100 fs). The National Synchrotron Light Source (NSLS) of the Brookhaven National Laboratory (BNL) sponsored a Seeded X-ray Free Electron Laser Workshop on December 13-14, 2002 to explore these challenging issues. Representatives from BNL, DESY, LBNL, SLAC and UCLA made presentations on the novel schemes under consideration at their laboratories. Workshop participants had a lively discussion on the feasibility, performance and R&D issues associated with the seeded XFEL schemes. An improvement of the electron beam quality will certainly be necessary to drive the XFEL. Self-seeding SASE, cascaded HGHG, and SASE pulse compression FELs show the most promise for producing short pulse X-rays. Of these, only the self-seeded and HGHG schemes generate longitudinally coherent radiation. While the pulse length in the self-seeded scheme is determined by the electron bunch length ({approx}100 fs), the pulse length in the HGHG scheme is determined by the short pulse seed laser, and so can be much shorter ({approx} 20 fs).},
doi = {10.2172/808633},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {12}
}

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