Non-uniform Influence of Prepulse Duration on a Nickel-Like Mo X-Ray Laser in XLIII

An experiment on a transient nickel-like Mo x-ray laser in the extreme light III (XL III) laser facility is analyzed, based on the two-dimensional hydrodynamic evolutions of a plasma under a non-uniform incident laser. Influences of the pulse duration and intensity on plasma scale length, electron density, temperature, as well as their distributions are investigated, based on which the pre-pulse character and delay time are determined according to the parameters of laser line focus on XLIII. It is found that the optimal intensity of the pre-pulse is 1.0TW/cm² with a duration of 500ps; a well modified pre-plasma can be obtained after 1.6ns under low quality line focus in the lab.