، صفحه 0-0 (1)

عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)

Temporal evolution of an intense Gaussian laser pulse propagated into the near critical density region of a magnetized plasma has been studied, taking ponderomotive nonlinearity into account. The modification of the dielectric permittivity of such plasma due to the ponderomotive force of the laser pulse has been derived. The equations governing the laser pulse dynamics in time have been achieved and numerically solved, using the eikonal function and paraxial ray approximation. The effect of magnetic field on the self-compression of the Gaussian laser pulse in the plasma has been demonstrated. It is found that , an increase in the value of external magnetic field causes an increase in the strength of the self-compression, especially in the higher values, and consequently, the self-compression occurs in shorter distance of propagation.

Pulse compression؛ laser pulse propagation؛ magnetized plasma