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Title: Nonlinear evolution of stimulated Raman scattering near the quarter-critical density

Nonlinear evolution of stimulated Raman scattering (SRS) near the quarter-critical density is studied using one-dimensional (1D) and two-dimensional (2D) particle-in-cell simulations in homogeneous plasmas. In 1D configuration, with two-plasmon decay (TPD) instability excluded, the system evolves into two regimes distinguished by whether density cavities have been formed or not. At low temperatures, a cavity regime characterised by high absorption and low reflection, and at high temperatures nonlinear frequency shift regime due to particle trapping, are observed. Furthermore, a competition between SRS and TPD in 2D simulations reveals that the nonlinear SRS does play a significant role near the quarter-critical density, whose influences were mostly neglected before.
Authors:
;  [1] ; ; ;  [1] ;  [2]
  1. HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22410301
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABSORPTION; DENSITY; HOMOGENEOUS PLASMA; NONLINEAR PROBLEMS; ONE-DIMENSIONAL CALCULATIONS; PLASMA INSTABILITY; PLASMA SIMULATION; PLASMONS; RAMAN EFFECT; REFLECTION; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0400-1000 K; TRAPPING; TWO-DIMENSIONAL CALCULATIONS