Analytical and numerical investigation of the brightness of high power X- and gamma rays as a result of intense laser interacting with plasma mirrors in radiation pressure regime

摘要

At laser intensity in the range similar to 10(22)-10(23) W/cm(2), the radiation pressure starts to play a key role in the interaction of an intense electromagnetic wave with a dense plasma foil. In this radiation pressure dominant regime (RPD regime) we present our numerical results for the frequency and brightness of the reflected radiation from a uniformly moving plasma mirror. The interaction of the electromagnetic wave with an approaching plasma mirror results in the Doppler-shifted reflected radiation. The reflected photon frequency lies in the hard X-ray or gamma-ray range. For the source pulse energy epsilon(s) = 12 J, lambda(s) = lambda = 0.8 mu m, n(e) = 480 n(cr) = 5.4x10(23)cm(-3)x(1 mu m /lambda)(2), there are approximately 9.6x10(42) hard X-ray photons/(mm(2)-mrad(2)-s.-0.1% bandwidth) in the energy range similar to 10 keV. In the case when 2 gamma> (n(e)lambda(3)(s))(1/6) for the same parameters of source laser pulse and driver pulse normalized vector potential a(d) = 300, lambda(d) = 0.8 mu m the brightness is found to be 3.9x10(34) photons / (mm(2) - mrad(2) - s.-0.1% bandwidth) in the energy range 100 keV. These radiations have broad range of applications in many areas of research e.g. medicine and material science.