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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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Slowly varying envelope kinetic simulations of pulse amplification by Raman backscattering

Cited 19 times inthomson ciCited 20 times inthomson ci
Title
Slowly varying envelope kinetic simulations of pulse amplification by Raman backscattering
Author
Hur, Min SupPenn, GWurtele, JSLindberg, R
Keywords
Kinetic simulation; Landau damping; Particle trapping; Raman amplification
Issue Date
2004-11
Publisher
AMER INST PHYSICS
Citation
PHYSICS OF PLASMAS, v.11, no.11, pp.5204 - 5211
Abstract
A numerical code based on an eikonal formalism has been developed to simulate laser-plasma interactions, specifically Raman backscatter(RBS). In this code, the dominant laser modes are described by their wave envelopes, avoiding the need to resolve the laser frequency; appropriately time-averaged equations describe particle motion. The code is fully kinetic, and thus includes critical physics such as particle trapping and Landau damping which are beyond the scope of the commonly used fluid three-wave equations. The dominant forces on the particles are included: the ponderomotive force resulting from the beat wave of the forward and backscattered laser fields and the self-consistent plasma electric field. The code agrees well, in the appropriate regimes, with the results from three-wave equations and particle-in-cell simulations. The effects of plasma temperature on RBS amplification are studied. It is found that increasing the plasma temperature results in modification to particle trapping and the saturation of RBS, even before the onset of Landau damping of the plasma wave. This results in a reduction in the coupling efficiency compared to predictions based on the three-wave equations.
URI
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DOI
10.1063/1.1796351
ISSN
1070-664X
Appears in Collections:
PHY_Journal Papers
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