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Non‐linear interaction of a q ‐Gaussian laser beam in a plasma channel created by the ignitor‐heater technique
Author(s) -
Gupta Naveen
Publication year - 2019
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201700201
Subject(s) - plasma channel , beam (structure) , ignitor , plasma , physics , laser , gaussian beam , optics , m squared , atomic physics , beam diameter , computational physics , laser beams , nuclear physics , ignition system , thermodynamics
This paper presents a theoretical investigation of the propagation characteristics of a q ‐Gaussian laser beam propagating through a plasma channel created by the ignitor‐heater technique. The ignitor beam creates the plasma by tunnel‐ionization of air. The heater beam heats the plasma electrons and establishes a parabolic channel. The third beam ( q ‐Gaussian beam) is guided in the plasma channel under the combined effects of density non‐uniformity and non‐uniform ohmic heating of the plasma channel. Numerical solutions of the non‐linear Schrodinger wave equation (NSWE) for the fields of laser beams are obtained with the help of the moment theory approach. Particular emphasis is placed on the dynamical variations of the spot size of the laser beams and the longitudinal phase shift of the guided beam with the distance of propagation.