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Nonlinear Effects of a Gaussian Laser Beam on Megagauss Magnetic Field Generation in Laser Produced Plasma
Author(s) -
Prabhakar M. V. H. V.,
Srivastava M. P.
Publication year - 1988
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.2150280302
Subject(s) - ponderomotive force , physics , magnetic field , beam (structure) , plasma , laser , diffraction , laser beam quality , nonlinear system , field (mathematics) , beam diameter , optics , atomic physics , self focusing , beam parameter product , divergence (linguistics) , beam divergence , m squared , laser beams , nuclear physics , quantum mechanics , linguistics , philosophy , mathematics , pure mathematics
The generation of megagauss magnetic field due to the time dependent part of the ponderomotive force of a self‐focused Gaussian laser beam indicent on a plasma has been studied. Defocusing of the laser beam becomes possible due to diffraction divergence in the case of a weakly nonlinear medium. The influence of defocusing of a laser beam on magnetic field generation has also been investigated. It is found that the magnitude of the magnetic field due to self focusing of the beam is enhanced and is comparable with the observed values, while there is a reduction in the magnitude of the magnetic field when the beam defocuses due to diffraction divergence in the presence of weak nonlinearity.