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Self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in plasmas

Journal Article:

Abstract

This paper presents a study of the self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in collisional and collisionless plasmas. The non-linear dependence of the dielectric constant inside a collisional plasma is due to inhomogeneous heating of energy carriers and in a collisionless plasma it is due to the ponderomotive force. It is found that the beam gets focused at different points in different planes, exhibiting the effect of astigmatism. In certain power regions considered, the beam either converges or defocuses in both the directions, while in some other regions of the power spectrum one dimension of the beam focuses while the other defocuses. The beam also propagates in an oscillatory waveguide.
Authors:
Nayyar, V P; Soni, V S [1] 
  1. Punjabi Univ., Patiala (India). Dept. of Physics
Publication Date:
Feb 14, 1979
Product Type:
Journal Article
Reference Number:
AIX-10-467640; EDB-80-003629
Resource Relation:
Journal Name: J. Phys., D (London); (United Kingdom); Journal Volume: 12:2
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER RADIATION; FOCUSING; LASER-RADIATION HEATING; BEAM-PLASMA SYSTEMS; COLLISIONAL HEATING; COLLISIONAL PLASMA; COLLISIONLESS PLASMA; ELLIPTICAL CONFIGURATION; PERMITTIVITY; WAVE PROPAGATION; CONFIGURATION; ELECTROMAGNETIC RADIATION; HEATING; HIGH-FREQUENCY HEATING; MAGNETIC-PUMPING HEATING; PLASMA; PLASMA HEATING; RADIATIONS; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production
OSTI ID:
5724212
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: JPAPB
Submitting Site:
INIS
Size:
Pages: 239-247
Announcement Date:

Journal Article:

Citation Formats

Nayyar, V P, and Soni, V S. Self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in plasmas. United Kingdom: N. p., 1979. Web.
Nayyar, V P, & Soni, V S. Self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in plasmas. United Kingdom.
Nayyar, V P, and Soni, V S. 1979. "Self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in plasmas." United Kingdom.
@misc{etde_5724212,
title = {Self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in plasmas}
author = {Nayyar, V P, and Soni, V S}
abstractNote = {This paper presents a study of the self-focusing and self-defocusing of elliptically shaped Gaussian laser beams in collisional and collisionless plasmas. The non-linear dependence of the dielectric constant inside a collisional plasma is due to inhomogeneous heating of energy carriers and in a collisionless plasma it is due to the ponderomotive force. It is found that the beam gets focused at different points in different planes, exhibiting the effect of astigmatism. In certain power regions considered, the beam either converges or defocuses in both the directions, while in some other regions of the power spectrum one dimension of the beam focuses while the other defocuses. The beam also propagates in an oscillatory waveguide.}
journal = {J. Phys., D (London); (United Kingdom)}
volume = {12:2}
journal type = {AC}
place = {United Kingdom}
year = {1979}
month = {Feb}
}