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Title: Effect of collisions on amplification of laser beams by Brillouin scattering in plasmas

We report on particle in cell simulations of energy transfer between a laser pump beam and a counter-propagating seed beam using the Brillouin scattering process in uniform plasma including collisions. The results presented show that the ion acoustic waves excited through naturally occurring Brillouin scattering of the pump field are preferentially damped without affecting the driven Brillouin scattering process resulting from the beating of the pump and seed fields together. We find that collisions, including the effects of Landau damping, allow for a more efficient transfer of energy between the laser beams, and a significant reduction in the amount of seed pre-pulse produced.
Authors:
;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [6]
  1. SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom)
  2. STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom)
  3. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
  4. School of Mathematics and Statistics, University of St. Andrews, St. Andrews, Fife KY16 9SS (United Kingdom)
  5. GoLP/Centro de Física dos Plasmas, Instituto Superior Técnico, 1049-001 Lisboa (Portugal)
  6. (United Kingdom)
Publication Date:
OSTI Identifier:
22218506
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 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; AMPLIFICATION; BEAM-PLASMA SYSTEMS; BRILLOUIN EFFECT; ELECTRON COLLISIONS; ENERGY TRANSFER; ION ACOUSTIC WAVES; LANDAU DAMPING; LIGHT TRANSMISSION; PLASMA DIAGNOSTICS; PLASMA SIMULATION; SOUND WAVES