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Title: Effects of high energy photon emissions in laser generated ultra-relativistic plasmas: Real-time synchrotron simulations

We model the emission of high energy photons due to relativistic charged particle motion in intense laser-plasma interactions. This is done within a particle-in-cell code, for which high frequency radiation normally cannot be resolved due to finite time steps and grid size. A simple expression for the synchrotron radiation spectra is used together with a Monte-Carlo method for the emittance. We extend previous work by allowing for arbitrary fields, considering the particles to be in instantaneous circular motion due to an effective magnetic field. Furthermore, we implement noise reduction techniques and present validity estimates of the method. Finally, we perform a rigorous comparison to the mechanism of radiation reaction, and find the emitted energy to be in excellent agreement with the losses calculated using radiation reaction.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [3]
  1. Department of Physics, Umeå University, SE–901 87 Umeå (Sweden)
  2. (Sweden)
  3. Department of Applied Physics, Chalmers University of Technology, SE–412 96 Göteborg (Sweden)
  4. (Russian Federation)
Publication Date:
OSTI Identifier:
22408246
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED PARTICLES; COMPUTERIZED SIMULATION; INTERACTIONS; LASER-PRODUCED PLASMA; MAGNETIC FIELDS; MONTE CARLO METHOD; PHOTON EMISSION; REAL TIME SYSTEMS; RELATIVISTIC PLASMA; SHORT WAVE RADIATION; SPECTRA; SYNCHROTRON RADIATION; SYNCHROTRONS