Theoretical investigation of the ultra-intense laser interaction with plasma mirrors in radiation pressure dominant regime

Frontiers of Physics and Plasma Science

Sonia, Krishna Kumar^1 ; Maheshwari, K.P.^1 ; Jaiman, N.K.^1

Department of Pure and Applied Physics, University of Kota, 324005, India^1

关键词: Counterpropagating;    Dense plasma slabs;    Intense electromagnetic waves;    Numerical results;    Radiation pressure;    Shifted frequencies;    Theoretical investigations;    Ultra-intense lasers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/836/1/012015/pdf
DOI  :  10.1088/1742-6596/836/1/012015

来源: IOP

【 摘 要 】

At laser intensity in the range ∼ 1022-1023W/cm2, the radiation pressure starts to play a key role in the interaction of an intense electromagnetic wave with a dense plasma foil. Depending upon the incident laser intensity, polarization of the incident beam and also on the density of the thin plasma layer the mirror motion may be assumed to be uniform, accelerated, or oscillatory. A solid dense plasma slab, accelerated in the radiation pressure dominant (RPD) regime, can efficiently reflect a counter-propagating relativistically strong source pulse consisting of up-shifted frequency and high harmonics. In this RPD regime we present our numerical results for the frequency and brightness of the reflected radiation from a uniformly moving plasma mirror. Our numerical results show that for the appropriate laser and plasma parameters in the case there are approximately 8.03 × 1042photons / (mm2- mrad2- sec.-0.1% bandwidth) in the energy range ∼ 10keV. In the case when for the same parameters and ad= 300, λd= 0.8 μm, the brightness is found to be 3.27 × 1034photons / (mm2- mrad2- sec. - 0.1% bandwidth) in the energy range ∼100 keV.