K- and L-shell absorption spectroscopy of laser-produced plasmas (invited)

Abstract
Diagnostic by Kα and Lα,β absorption spectroscopy leads to information on the ionization state, the electronic temperature, and matter density of laser‐produced plasmas. In particular, a mapping of the ionic populations is possible by recording the spectra on space‐resolved x‐ray spectrographs. The plasma to be probed and the x‐ray backlighter source are produced by different beams of the same frequency‐doubled Nd laser. Kα spectroscopy probes F‐like to He‐like ions and Lα,β spectroscopy is a diagnostic of higher atomic number ions stripped into configurations around the Ca‐like structure. Measurements of dense matter radiatively heated at temperatures around 50–100 eV in laser‐irradiated multilayered targets or x‐ray heated samples evidence the effect of radiative heating on the temperature gradient in the target. The space and time‐resolved measurements of the corona of a low temperature aluminum plasma are presented.