7 January 2004 Femtosecond x-ray line emission from specially designed targets irradiated by short laser pulses
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The invention of high-power ultra short pulse lasers has opened way to investigations aimed at creation of a new type of bright x-ray source for different applications including material science and time resolved x-ray diffraction for biology. The conversion efficiency of the laser energy incident onto a solid target into the x-ray emission depends on many factors, including the temporal profile of laser pulse. We report here the results of our theoretical and experimental investigations of the line x-ray emission from layer solid targets irradiated by ultra short laser pulses. The parameters of laser pre-pulse and target thickness are optimized in order to get the maximum laser energy conversion into the emission in the selected x-ray line. Multi-layer foils are proposed in order to increase the energy of K-α line emission from laser plasma simultaneously with shortening of x-ray pulse up to hundred femtoseconds. The emission is studied, both experimentally, and by means of analytical model and numerical simulations.
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Alexander A. Andreev, Alexander A. Andreev, Hidetoshi Nakano, Hidetoshi Nakano, Jiri Limpouch, Jiri Limpouch, } "Femtosecond x-ray line emission from specially designed targets irradiated by short laser pulses", Proc. SPIE 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications, (7 January 2004); doi: 10.1117/12.509680; https://doi.org/10.1117/12.509680

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