Regions for Brillouin seed pulse growth in relativistic laser-plasma interaction

Journal Article · Sat Sep 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4754698· OSTI ID:22086173

Lehmann, G; Schluck, F; Spatschek, K H ^[1]

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1. Institut fuer Theoretische Physik, Heinrich-Heine-Universitaet Duesseldorf, D-40225 Duesseldorf (Germany)

Parametric plasma processes received renewed interest in the context of generating ultraintense and ultrashort laser pulses up to the exawatt-zetawatt regime. For Brillouin scattering and seed pulse amplification at high intensities, the strong coupling regime is of special interest. The intensity-driven low-frequency modes depend on the amplitudes of the laser fields. It is investigated here how these modes develop in the relativistic regime. Then, a unified treatment of Raman and Brillouin processes becomes necessary. Assuming circular polarization, it is shown that with increasing intensity an overlap of the originally different Raman, Brillouin, and modulational instability branches occurs. Numerical simulations with a linearized Maxwell-fluid code confirm the analytically predicted behavior.

• OSTI ID: 22086173
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
AMPLITUDES
BEAM-PLASMA SYSTEMS
BRILLOUIN EFFECT
COMPUTERIZED SIMULATION
INTERACTIONS
LASER RADIATION
PARAMETRIC INSTABILITIES
POLARIZATION
PULSES
RELATIVISTIC PLASMA
RELATIVISTIC RANGE
STRONG-COUPLING MODEL