Nonlinear effects of a Gaussian laser beam on megagauss magnetic field generation in laser produced plasma
Abstract
The generation of MG magnetic fields due to the time-dependent part of the ponderomotive force of a self-focused Gaussian laser beam incident 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.
- Publication:
-
Contributions to Plasma Physics
- Pub Date:
- 1988
- DOI:
- 10.1002/ctpp.2150280302
- Bibcode:
- 1988CoPP...28..201P
- Keywords:
-
- Glass Lasers;
- Laser Beams;
- Laser Plasmas;
- Magnetic Fields;
- Neodymium Lasers;
- Nonlinear Optics;
- Defocusing;
- Maxwell Equation;
- Ponderomotive Forces;
- Self Focusing;
- Time Dependence;
- Plasma Physics