12 April 1996 X-ray emission from ultrashort UV-laser-pulse-produced plasmas
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X-ray K- and L-shell emission from aluminum and carbon plasmas produced by subpicosecond UV-laser pulses has been investigated using various spectrographs. The spectra have been measured as a function of laser intensity in the range from 1014 W/cm2 to 1018 W/cm2. A computer simulation including reabsorption of the resonance lines has been performed and the observed and calculated spectra compared. Plasma parameters have been deduced by line emission and continuous emission observations. It has been found that for high laser intensities the resonance line emission and that from the satellites comes from the overdense region. A scaling of the electron temperature with the irradiance has been obtained. From the x-ray spectra measured at different laser intensities, the thresholds for the formation of hydrogen-like and helium-like ions in aluminum and carbon plasmas have been determined.
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U. Teubner, U. Teubner, Ingo Uschmann, Ingo Uschmann, Wolfgang Theobald, Wolfgang Theobald, Eckhart Foerster, Eckhart Foerster, } "X-ray emission from ultrashort UV-laser-pulse-produced plasmas", Proc. SPIE 2770, Laser Optics '95 and ICONO '95: Superintense Laser Fields, (12 April 1996); doi: 10.1117/12.238027; https://doi.org/10.1117/12.238027

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