Propagation and Damping of Nonlinear Plasma Wave Packets

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J. E. Fahlen
Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA

B. J. Winjum and T. Grismayer
Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA

W. B. Mori
Department of Electrical Engineering, University of California, Los Angeles, California 90095 and Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA

Received 16 December 2008; published 17 June 2009

Nonlinearelectron plasma wave packets are shown to locally damp atthe rear of the packet. Resonant particles enter the backof the packet and linearly damp the first few wavelengths,thereby carrying energy away from the back edge and eventuallyeroding the packet. This process could significantly affect the recurrenceand long-time behavior of stimulated Raman scattering because it ispredicted that a nonlinear packet will erode away before ittravels a speckle length. The effects of a density gradienton the packet's propagation are also discussed.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.102.245002
DOI:	10.1103/PhysRevLett.102.245002
PACS:	52.35.Fp; 52.35.Mw; 52.38.Bv; 52.65.-y 52.35.Fp Plasma electrostatic waves and oscillations 52.35.Mw Nonlinear phenomena: plasma waves, wave propagation and other interactions 52.38.Bv Rayleigh scattering; stimulated Brillouin and Raman scattering in plasmas 52.65.-y Plasma simulation YEAR: 2009

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