Abstract
Characteristic K α x rays arising when a metallic target is irradiated by femtosecond infrared pulses that are generated by a terawatt chromium-forsterite laser system (1240 nm, 90 mJ, 80 fs) are studied. The absolute yield (up to 3 × 108 photons/sr pulse) and the coefficient of the transformation of laser radiation to K α radiation (maximum value ≈0.03%) are measured for an iron target. The dependence of the radiation intensity on the angle of incidence of p polarized laser radiation is analyzed. The mechanisms of the production of fast electrons responsible for generating characteristic x rays are discussed.
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Original Russian Text © M.B. Agranat, N.E. Andreev, S.I. Ashitkov, A.V. Ovchinnikov, D.S. Sitnikov, V.E. Fortov, A.P. Shevel’ko, 2006, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2006, Vol. 83, No. 2, pp. 80–83.
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Agranat, M.B., Andreev, N.E., Ashitkov, S.I. et al. Generation of characteristic x rays by a terawatt femtosecond chromium-forsterite laser. Jetp Lett. 83, 72–74 (2006). https://doi.org/10.1134/S0021364006020068
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DOI: https://doi.org/10.1134/S0021364006020068