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

Abstract

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
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
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

Citation Formats

Verma, Kanika, Sajal, Vivek, Varshney, Prateek, Kumar, Ravindra, and Sharma, Navneet K. Stimulated Raman scattering of beat wave of two counter-propagating X-mode lasers in a magnetized plasma. United States: N. p., 2014. Web. doi:10.1063/1.4863981.
Verma, Kanika, Sajal, Vivek, Varshney, Prateek, Kumar, Ravindra, & Sharma, Navneet K. Stimulated Raman scattering of beat wave of two counter-propagating X-mode lasers in a magnetized plasma. United States. https://doi.org/10.1063/1.4863981
Verma, Kanika, Sajal, Vivek, Varshney, Prateek, Kumar, Ravindra, and Sharma, Navneet K. Sat . "Stimulated Raman scattering of beat wave of two counter-propagating X-mode lasers in a magnetized plasma". United States. https://doi.org/10.1063/1.4863981.
@article{osti_22252097,
title = {Stimulated Raman scattering of beat wave of two counter-propagating X-mode lasers in a magnetized plasma},
author = {Verma, Kanika and Sajal, Vivek and Varshney, Prateek and Kumar, Ravindra and Sharma, Navneet K.},
abstractNote = {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.},
doi = {10.1063/1.4863981},
url = {https://www.osti.gov/biblio/22252097}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 2,
volume = 21,
place = {United States},
year = {2014},
month = {2}
}