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Title: A spectral unaveraged algorithm for free electron laser simulations

We propose and discuss a numerical method to model electromagnetic emission from the oscillating relativistic charged particles and its coherent amplification. The developed technique is well suited for free electron laser simulations, but it may also be useful for a wider range of physical problems involving resonant field–particles interactions. The algorithm integrates the unaveraged coupled equations for the particles and the electromagnetic fields in a discrete spectral domain. Using this algorithm, it is possible to perform full three-dimensional or axisymmetric simulations of short-wavelength amplification. In this paper we describe the method, its implementation, and we present examples of free electron laser simulations comparing the results with the ones provided by commonly known free electron laser codes.
Authors:
 [1] ;  [2] ; ;  [1]
  1. Laboratoire d'Optique Appliquée, ENSTA-ParisTech, CNRS, Ecole Polytechnique, UMR 7639, 91761 Palaiseau (France)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
22382183
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 282; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; AMPLIFICATION; AXIAL SYMMETRY; CHARGED PARTICLES; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; ELECTROMAGNETIC FIELDS; EMISSION; FREE ELECTRON LASERS; IMPLEMENTATION; RELATIVISTIC RANGE; SYNCHROTRON RADIATION SOURCES; THREE-DIMENSIONAL CALCULATIONS