Focusing of intense laser beam by a thin axially magnetized plasma lens

Ghorbanalilu, M.
February 2010
Physics of Plasmas;Feb2010, Vol. 17 Issue 2, p023111
Academic Journal
Focusing of intense laser beams by a thin magnetized plasma slab is investigated. A thin plasma slab is used as an optical element. The focal length is the distance between the plasma lens and the laser beam focus point. The external magnetic field is applied along the direction of the laser field propagation. The nonlinear current density induced in the plasma lens is derived up to the third order of perturbation and the evolution of the spot size for a Gaussian beam profile is determined by making use of the variational principle approach method. It is shown that the axially magnetic field decreases the minimum spot size and increases the focal length significantly.


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