Abstract
In present paper the determination of the spot size of an ultra-short laser beam in uniform magnetized plasma with a dominant cold plasma has been studied. The liner dispersion relation of the laser beam propagating in Magnetized plasma have been found. Magnetic field is set up and source dependent expansion method is applied to determining the spot size of the intense laser beam with gaussian profile. The transverse magnetization of plasma and its impact on the self-focusing property of the dense laser governing to reduction in critical power necessary to self-focusing beam is shown.
Highlights
When Ultra-Short laser pulse of high intensity passes through the plasma, a nonlinear interaction between plasma and Laser gives a very important result
In the present paper we have investigated the effect of the magnetic field over the self-focusing of highly intense laser pulse penetrating in a cold dense and homogeneous plasma
The present work reveals that transvers magnetization of plasma increases the selffocusing characteristics of the laser beam propagating in magnetized plasma and the increase in magnetic field represents a decrease in the laser spot size
Summary
When Ultra-Short laser pulse of high intensity passes through the plasma, a nonlinear interaction between plasma and Laser gives a very important result. It is highly useful for the laser fusion, laser wake-field acceleration etc. Intense magnetic field produces in laser plasma interaction [4] This field affects the penetration of ultra- short laser pulse in plasma because Canonical momentum for magnetized plasma interaction is not properly conserved as similar as in case of unmagnetized Plasma [5].
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