EM Field and Ponderomotive Force Generation by an Ultrashift Intense Gaussian laser pulse in a spatially variable Density Plasma

The interaction of electromagnetic waves (lasers) with plasma is important because of its applications in plasma accelerators, X-ray production, laser fusion, generation of nonlinear effects such as ponderomotive force, which leads to accelerating plasma electrons, by oscillating them. In this paper, we investigate the propagation of Cosh-Gaussian laser beam and generation of ponderomotive force and magnetic field with a given density profile in plasma. By comparing, the diagrams obtained from the magnetic and electric fields, we see that they have a phase difference 􀰗 􀬶. On the other hand, by applying a variable density profile, the magnetic field gradually tends to zero. Pondromotive force diagrams are also drawn.

Keywords:

Interaction laser- plasma , Magnetic field , Cosh-Gaussian beam , Ponderomotive force.