skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Use of the Lorentz-Boosted Frame Transformation to Simulate Free-Electron Laser Amplifier Physics

Abstract

Recently [1]it has been pointed out that numerical simulation of some systems containing charged particles with highly relativistic directed motion can by speeded up by orders of magnitude by choice of the proper Lorentz boosted frame. A particularly good example is that of short wavelength free-electron lasers (FELs) in which a high energy (E0>_ 250 MeV) electron beam interacts with a static magnetic undulator. In the optimal boost frame with Lorentz factor gamma F, the red-shifted FEL radiation and blue shifted undulator have identical wavelengths and the number of required time-steps (presuming the Courant condition applies) decreases by a factor of g2 F for fullyelectromagnetic simulation. We have adapted the WARP code [2]to apply this method to several FEL problems including coherent spontaneous emission (CSE) from pre-bunched e-beams, and strong exponential gain in a single pass amplifier configuration. We discuss our results and compare with those from the"standard" FEL simulation approach which adopts the eikonal approximation for propagation ofthe radiation field.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Accelerator& Fusion Research Division
OSTI Identifier:
940581
Report Number(s):
LBNL-1003E
TRN: US0807163
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: The 13th Advanced Accelerator Concepts Workshop, Santa Cruz, CA, July 27-August 2, 2008
Country of Publication:
United States
Language:
English
Subject:
43; 97; ACCELERATORS; AMPLIFIERS; CHARGED PARTICLES; CONFIGURATION; EIKONAL APPROXIMATION; ELECTRON BEAMS; FREE ELECTRON LASERS; LASERS; PHYSICS; RADIATIONS; SIMULATION; TRANSFORMATIONS; WAVELENGTHS; WIGGLER MAGNETS; free-electron laser, electromagnetic simulation algorithms

Citation Formats

Fawley, W M, and Vay, J -L. Use of the Lorentz-Boosted Frame Transformation to Simulate Free-Electron Laser Amplifier Physics. United States: N. p., 2008. Web.
Fawley, W M, & Vay, J -L. Use of the Lorentz-Boosted Frame Transformation to Simulate Free-Electron Laser Amplifier Physics. United States.
Fawley, W M, and Vay, J -L. 2008. "Use of the Lorentz-Boosted Frame Transformation to Simulate Free-Electron Laser Amplifier Physics". United States. https://www.osti.gov/servlets/purl/940581.
@article{osti_940581,
title = {Use of the Lorentz-Boosted Frame Transformation to Simulate Free-Electron Laser Amplifier Physics},
author = {Fawley, W M and Vay, J -L},
abstractNote = {Recently [1]it has been pointed out that numerical simulation of some systems containing charged particles with highly relativistic directed motion can by speeded up by orders of magnitude by choice of the proper Lorentz boosted frame. A particularly good example is that of short wavelength free-electron lasers (FELs) in which a high energy (E0>_ 250 MeV) electron beam interacts with a static magnetic undulator. In the optimal boost frame with Lorentz factor gamma F, the red-shifted FEL radiation and blue shifted undulator have identical wavelengths and the number of required time-steps (presuming the Courant condition applies) decreases by a factor of g2 F for fullyelectromagnetic simulation. We have adapted the WARP code [2]to apply this method to several FEL problems including coherent spontaneous emission (CSE) from pre-bunched e-beams, and strong exponential gain in a single pass amplifier configuration. We discuss our results and compare with those from the"standard" FEL simulation approach which adopts the eikonal approximation for propagation ofthe radiation field.},
doi = {},
url = {https://www.osti.gov/biblio/940581}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jul 27 00:00:00 EDT 2008},
month = {Sun Jul 27 00:00:00 EDT 2008}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: