Improving the relativistic self-focusing of intense laser beam in plasma using density transition

Abstract

The propagation of a Gaussian beam in underdense plasma with upward increasing density ramp is analyzed. In this work are shown that the spot size oscillations of laser beam increases and its amplitude shrinks with proper plasma density ramp. This causes the laser beam to become more focused and penetrations deep into the plasma by reduction of diffraction effect. The related focusing parameters are optimized to get the best possible focusing at the relativistic threshold intensity of Nd-glass laser and the effect of the laser intensity in the self-focusing parameters is also investigated. The analytical calculations are presented and showed more reliable results in comparison to the previous works.

Relativistic self-focusing of intense laser beam in thermal collisionless quantum plasma with ramped density profile

“…This prediction is reported by Pukhov et al [60]. Also, the same results are presented for a ramped plasma density in the classical regime [51].…”

“…The self-focusing of an intense laser beam in the classical plasma and in the cold quantum plasma has been studied by considering different plasma density profiles [49][50][51][52]. In the thermal homogenous quantum plasma, the laser selffocusing effect has been investigated by Patil et al [48].…”

Investigation by simulation of X-ray beams produced via interactions of suitable quasi-monoenergetic electrons with solid targets

“…The propagation of such intense short laser pulses has been investigated for various plasma conditions [2][3][4][5]. Production of energetic particle beams, such as quasi-monoenergetic electrons and ion blocks, has been reported [6][7][8][9][10][11].…”

The evaluation of transmutation of hazardous nuclear waste of 90Sr, into valuable nuclear medicine of 89Sr by ultraintense lasers

“…The laser-matter interaction meets the high energy physics in laser-plasma accelerators in generating highly collimated bright X/g-ray sources (Giulietti et al, 2005;Chyla, 2006;Bessonov et al, 2008) and the production of thick ion blocks (Glowacz, 2006;Yazdani et al, 2009;Hora, 2009;Azizi et al, 2009;Hora et al, 2009). The propagation of such intense laser field is investigated in various plasma conditions (Sadighi-Bonabi et al, 2009d. The propagation of such intense laser field is investigated in various plasma conditions (Sadighi-Bonabi et al, 2009d.…”