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

K. A. Humphrey, R. M G M Trines, F. Fiuza, D. C. Speirs, P. Norreys, R. A. Cairns, L. O. Silva, R. Bingham

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Abstract

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. 

Original languageEnglish
Article number102114
Number of pages5
JournalPhysics of Plasmas
Volume20
Issue number10
DOIs
Publication statusPublished - 1 Oct 2013

Keywords

  • counterpropagating
  • Landau damping
  • laser pumps
  • particle-in-cell simulations
  • prepulses
  • pump fields

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