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Inhibition of stimulated Raman scattering due to the excitation of stimulated Brillouin scattering

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5004689· OSTI ID:1535348
 [1];  [2];  [2];  [3];  [4];  [5]
  1. Shanghai Jiao Tong Univ. (China); DOE/OSTI
  2. Shanghai Jiao Tong Univ. (China)
  3. Univ. of Rochester, NY (United States)
  4. Univ. of Maryland, College Park, MD (United States); Univ. of Macau (China)
  5. Shanghai Jiao Tong Univ. (China); Univ. of Strathclyde, Glasgow (United Kingdom)

The nonlinear coupling between stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) of intense laser in underdense plasma is studied theoretically and numerically. Based upon the fluid model, their coupling equations are derived, and a threshold condition of plasma density perturbations due to SBS for the inhibition of SRS is given. Particle-in-cell simulations show that this condition can be achieved easily by SBS in the so-called fluid regime with kLλD<0.15, where kL is the Langmuir wave number and λD is the Debye length [Kline et al., Phys. Plasmas 13, 055906 (2006)]. SBS can reduce the saturation level of SRS and the temperature of electrons in both homogeneous and inhomogeneous plasma. Numerical simulations also show that this reduced SRS saturation is retained even if the fluid regime condition mentioned above is violated at a later time due to plasma heating.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FC02-04ER54789; SC0012316
OSTI ID:
1535348
Alternate ID(s):
OSTI ID: 1395384
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 24; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Suppression of parametric instabilities in inhomogeneous plasma with multi-frequency light journal October 2019

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