Abstract
In the present paper, we have explored the temperature range for self-focusing of lowest-order Bessel-Gaussian laser beams in plasma by considering combined effect of relativistic and ponderomotive regime of interaction. The nonlinear differential equation for beam-width parameter is exploited under Wentzel-Kramers-Brillouin and paraxial approximations by using parabolic equation approach. Results of numerical computation are presented in the form of graphs and discussed. It is found that the temperature range for self-focusing of zeroth-order Bessel-Gaussian beams decreases, as transverse component of wave parameter increases up to certain limit. The temperature range for self focusing of Gaussian beam in the plasma with relativistic and ponderomotive regime is also deduced as a particular case.
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