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Hur, Min Sup
Computational Plasma Lab
Research Interests
  • Laser-Plasma Electron Accelerator and Table-top Femto Hard X-ray generation
  • Plasma-based THz generation
  • PIC and fluid code development
  • Reduced Laser-Plasma modelling
  • Capillary Discharge Systems for Guidied Laser Wakefield Accelerators

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Electron kinetic effects on raman backscatter in plasmas

Cited 28 times inthomson ciCited 25 times inthomson ci
Title
Electron kinetic effects on raman backscatter in plasmas
Author
Hur, Min SupLindberg, RRCharman, AEWurtele, JSSuk, H
Keywords
Electron kinetic effects; Langmuir waves; Ponderomotive phase; Raman backscatter (RBS)
Issue Date
2005-09
Publisher
AMERICAN PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.95, no.11, pp.1 - 4
Abstract
We augment the usual three-wave cold-fluid equations governing Raman backscatter (RBS) with a new kinetic thermal correction, proportional to an average of particle kinetic energy weighted by the ponderomotive phase. From closed-form analysis within a homogeneous kinetic three-wave model and ponderomotively averaged kinetic simulations in a more realistic pulsed case, the magnitude of these new contributions is shown to be a measure of the dynamical detuning between the pump laser, seed laser, and Langmuir wave. Saturation of RBS is analyzed, and the role of trapped particles illuminated. Simple estimates show that a small fraction of trapped particles (similar to 6%) can significantly suppress backscatter. We discuss the best operating regime of the Raman plasma amplifier to reduce these deleterious kinetic effects.
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DOI
10.1103/PhysRevLett.95.115003
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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