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Diploma thesis abstract

X-Ray Generation from Xe cluster interaction with femtosecond Cr:Forsterite laser pulses at presence of light carrier gas.
Student: Golubev A.P. Scientific advisers: Gordienko V.M., Djidjoev M.S. Interaction of femtosecond laser pulses at wavelength 1240nm with clusters is investigated. Experimental set up of Xe-cluster beam generation involving pulsed nozzle with piezoelectric valve is created. Xe-gas and mixture XeNe are used, partial pressure at stagnation chamber being 2-20bar. Diagnostics of Xe-cluster beams based on Rayleigh scattering of XeCl-laser (l=308nm), of second harmonic of Cr:Forsterite laser pulses and on pyroelectric detection scheme is performed. XeCl-laser diagnostics at pressures 1-6bar revealed power dependence of scattered signal on pressure with power exponent 2.7, at pressures 6-15bar dependence turned to be linear. Cr:Forsterite-laser diagnostics revealed linear dependence at pressures 4-20bar. Experiments of femtosecond laser-cluster interaction are conducted. X-Ray yield is observed at efficiency of 1.2.10-8. Enhancement of cluster concentration at axis area, narrowing of cluster beam, enhancement of X-ray yield when using XeN mixture are observed.