Generation of ultrashort Kα radiation from quasipoint interaction area of femtosecond pulses with thin foils

Zhavoronkov, N.; Gritsai, Y.; Bargheer, M.; Woerner, M.; Elsaesser, T.
June 2005
Applied Physics Letters;6/13/2005, Vol. 86 Issue 24, p244107
Academic Journal
We demonstrate a concept for short x-ray generation at 1 kHz repetition rate from a thin-foil target in a very compact configuration, which allows one, essentially, to decrease the distance between x-ray source and investigated object. The scaling for the hard x-ray yield and the hot electron temperature with the pulse intensity are determined and best described by a power law. The useful photon fluxes of 3.4×109 and 3.3×109 phot/(s srad) are generated for the Ni- and Cu Kα lines, respectively. The size of the x-ray source was detected to be 10 μm.


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