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Title: Some issues and subtleties in numerical simulation of X-ray FEL's

Abstract

Part of the overall design effort for x-ray FEL's such as the LCLS and TESLA projects has involved extensive use of particle simulation codes to predict their output performance and underlying sensitivity to various input parameters (e.g. electron beam emittance). This paper discusses some of the numerical issues that must be addressed by simulation codes in this regime. We first give a brief overview of the standard approximations and simulation methods adopted by time-dependent(i.e. polychromatic) codes such as GINGER, GENESIS, and FAST3D, including the effects of temporal discretization and the resultant limited spectral bandpass,and then discuss the accuracies and inaccuracies of these codes in predicting incoherent spontaneous emission (i.e. the extremely low gain regime).

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director, Office of Science (US)
OSTI Identifier:
805131
Report Number(s):
LBNL-51146
R&D Project: 450101; B& R YN0100000; TRN: US0301656
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 24th International Free Electron Laser Conference, Argonne, IL (US), 09/08/2002--09/13/2002; Other Information: PBD: 30 Sep 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DESIGN; ELECTRON BEAMS; FREE ELECTRON LASERS; ORIGIN; PERFORMANCE; SENSITIVITY; SIMULATION; SPICES; FREE-ELECTRON LASER NUMERICAL SIMULATION

Citation Formats

Fawley, William M. Some issues and subtleties in numerical simulation of X-ray FEL's. United States: N. p., 2002. Web.
Fawley, William M. Some issues and subtleties in numerical simulation of X-ray FEL's. United States.
Fawley, William M. Mon . "Some issues and subtleties in numerical simulation of X-ray FEL's". United States. https://www.osti.gov/servlets/purl/805131.
@article{osti_805131,
title = {Some issues and subtleties in numerical simulation of X-ray FEL's},
author = {Fawley, William M.},
abstractNote = {Part of the overall design effort for x-ray FEL's such as the LCLS and TESLA projects has involved extensive use of particle simulation codes to predict their output performance and underlying sensitivity to various input parameters (e.g. electron beam emittance). This paper discusses some of the numerical issues that must be addressed by simulation codes in this regime. We first give a brief overview of the standard approximations and simulation methods adopted by time-dependent(i.e. polychromatic) codes such as GINGER, GENESIS, and FAST3D, including the effects of temporal discretization and the resultant limited spectral bandpass,and then discuss the accuracies and inaccuracies of these codes in predicting incoherent spontaneous emission (i.e. the extremely low gain regime).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Sep 30 00:00:00 EDT 2002},
month = {Mon Sep 30 00:00:00 EDT 2002}
}

Conference:
Other availability
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