Study of non-linear interaction of circular laser pulse propagating through hot magnetized plasma in the presence of a planar magnetostatic wiggler

Abstract

In this paper, the self-focusing property of an intense circularly polarized laser pulse in hot magnetized plasma is investigated theoretically. First, an envelope equation governing the spot-size of the laser beam for both left- and right-hand polarizations has been derived in the presence of a planar wiggler. Furthermore, non-linear dispersion relation of laser pulse is obtained by using Maxwell’s equations and relativistic fluid momentum equation. The numerical results show that with increasing the wiggler field, strength self-focusing of the right-hand polarization laser pulse is enhanced, while for the left-hand polarization, laser de-focusing is enhanced. In addition, it is shown that with increasing the wiggler frequency, the normalized laser power has an enhancing behavior. Besides, it is found that effect of the wiggler field on the density profile in the right-hand polarization is more prominent.

Keywords

• self-focusing
• planar magnetostatic wiggler
• laser spot-size
• hot magnetized plasma