X‐Ray Radiation Measurements With Photodiodes In Plasmas Generated By 10¹⁷ W/Cm² Intensity Krf Excimer Laser Pulses Available to Purchase

Experiments were carried out using a prepulse‐free hybrid KrF excimer‐dye laser system (700fs pulse duration, 248nm wavelength, 15mJ pulse energy). The intensity of the p‐polarized, focused laser beam was 1.5⋅10¹⁷ W/cm². Vacuum ultraviolet (VUV) and x‐rays from solid state laser plasmas were generated in the laser‐plasma interaction of subpicosecond laser pulses of nonrelativistic laser intensities. An x‐ray sensitive FLM photodiode (ITE, Warsaw) was used to detect x‐rays between 1–19 keV in front of the targets. The diode was filtered by a 4μm Al foil. The dependence of the x‐ray flux on laser intensity and the angular distribution of x‐rays for aluminum and copper targets in the half space of the front side of the targets were investigated.