Abstract:Abstract. K line emission from Mo was experimentally and theoretically studied using clean, ultrahighintensity femtosecond laser pulses. The absolute yields of K x-rays at 17 keV from Mo were measured as a function of the laser pulse contrast ratio and irradiation intensity. Significantly enhanced K yields were obtained by employing high contrast ratio at optimum irradiance. Conversion efficiencies of 4.28 × 10 −5 /sr, the highest values obtained to date, was demonstrated with contrast ratios in the range of 1… Show more
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