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Title: Stimulated Raman scattering of beat wave of two counter-propagating X-mode lasers in a magnetized plasma

Effects of transverse static magnetic field on stimulated Raman scattering (SRS) of the beat wave excited by two counter-propagating lasers are studied. Two counter-propagating lasers with frequency difference, ω{sub 1}∼ω{sub 2}≥2ω{sub p}, drive a non resonant space charge beat mode at wave number k{sup →}{sub 0}≈k{sup →}{sub 1}+k{sup →}{sub 2} in a plasma, where k{sup →}{sub 1} and k{sup →}{sub 2} are wave vectors of lasers having frequencies ω{sub 1} and ω{sub 2}, respectively. The driven beat wave acts as a pump for SRS and excites parametrically a pair of plasma wave (ω,k{sup →}) and side band electromagnetic wave (ω{sub 3},k{sup →}{sub 3}) propagating in the sideward direction in such a way that momentum remains conserved. The growth rate of Raman process is maximum for side scattering at θ{sub s}=π/2 for lower values of applied magnetic field (∼1 kG), which can be three fold by applying magnetic field ∼5.0 kG. Thus, optimum value of magnetic field can be utilized to achieve maximum electron acceleration in counter propagating geometry of beat wave acceleration by reducing the growth rate of Raman process.
Authors:
; ; ; ;  [1]
  1. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida 201307, UP (India)
Publication Date:
OSTI Identifier:
22252097
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 2; Other Information: (c) 2014 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; ACCELERATION; ELECTROMAGNETIC RADIATION; ELECTRONS; LASERS; MAGNETIC FIELDS; PLASMA WAVES; RAMAN EFFECT; SCATTERING; SPACE CHARGE; STRONTIUM SULFIDES; VECTORS