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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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Test particle method for incorporation of the kinetic effects into the envelope simulations of Raman backscattering

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Title
Test particle method for incorporation of the kinetic effects into the envelope simulations of Raman backscattering
Author
Hur, Min SupSuk, Hyyong
Keywords
Kinetic effect; Laser; Plasma; Raman backscatter; Test particle
Issue Date
2007-10
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF COMPUTATIONAL PHYSICS, v.226, no.2, pp.2133 - 2145
Abstract
A new test particle method is presented for self-consistent incorporation of the kinetic effects into the fluid three-wave model. One of the most important kinetic effects is the electron trapping and it has been found that the trapping affects significantly the behavior of Raman backscatter and Raman backward laser amplification. The conventional fluid three-wave model cannot reproduce the kinetic simulations in the trapping regime. The test particle scheme utilizes the same equations for the laser evolution as in the three-wave model. However, the plasma wave is treated by the envelope-kinetic equation, which consists of envelope evolution and the kinetic term. The core of the new scheme is employing test particles to compute the kinetic term self-consistently. The benchmarking results against the averaged particle-in-cell (aPIC) code show excellent agreements, and the computation speed gain over the aPIC is from 2 to 20 depending on parameters.
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DOI
10.1016/j.jcp.2007.06.032
ISSN
0021-9991
Appears in Collections:
PHY_Journal Papers
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