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

Journal Article · Tue Oct 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4825356· OSTI ID:22218506

Humphrey, K. A.; Speirs, D. C. ^[1]; Norreys, P. ^[2]; Fiuza, F. ^[3]; Cairns, R. A. ^[4]; Silva, L. O. ^[5]; Bingham, R. ^[1]

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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)

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.

• OSTI ID: 22218506
• Journal Information: Physics of Plasmas, Vol. 20, Issue 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

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