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

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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 ... continued below

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Fawley, William M. September 30, 2002.

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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).

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INIS; OSTI as DE00805131

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  • 24th International Free Electron Laser Conference, Argonne, IL (US), 09/08/2002--09/13/2002

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  • Report No.: LBNL--51146
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 805131
  • Archival Resource Key: ark:/67531/metadc735348

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  • September 30, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • April 4, 2016, 3:43 p.m.

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Fawley, William M. Some issues and subtleties in numerical simulation of X-ray FEL's, article, September 30, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc735348/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.