BROWSE

Related Researcher

Author's Photo

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

ITEM VIEW & DOWNLOAD

Effects of the frequency detuning in Raman backscattering of infinitely long laser pulses in plasmas

Cited 2 times inthomson ciCited 2 times inthomson ci
Title
Effects of the frequency detuning in Raman backscattering of infinitely long laser pulses in plasmas
Author
Hur, Min SupHwang, IlmoonJang, Hyo JaeSuka, Hyyong
Keywords
AMPLIFICATION; SIMULATIONS; WAVES
Issue Date
2006-07
Publisher
AMER INST PHYSICS
Citation
PHYSICS OF PLASMAS, v.13, no.7, pp.1 - 6
Abstract
Raman backscattering (RBS) in an infinite homogeneous laser-plasma system was investigated with the three-wave fluid model and averaged particle-in-cell (aPIC) simulations in the nonrelativistic and low temperature regime. It was found that the periodic boundary condition for the electrostatic potential, which is commonly used in an infinite homogeneous plasma, induces a numerical frequency shift of the plasma wave. The initial frequency detuning between the three waves is modified by the frequency shift, leading to a significantly wrong result in the RBS system. An alternative boundary condition based on the Maxwell equation is presented. The aPIC simulations with the modified boundary condition show that the pump depletion level depends sensitively on the frequency mismatch between the three waves. This sensitivity is closely related with the erroneous RBS: the numerical frequency shift is very minor (a few percent of the plasma frequency or less than that) but RBS can be greatly affected even by such a small frequency change. Analytic formulas for the pump depletion time and level is derived and compared to the aPIC simulations with the modified boundary condition, showing an excellent agreement.
URI
Go to Link
DOI
10.1063/1.2222327
ISSN
1070-664X
Appears in Collections:
PHY_Journal Papers
Files in This Item:
000239424400038.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU