Speaker
Description
We carried out an experiment to generate photoionised plasma using line radiation. Using the high-power ns laser to irradiate the Ag-coated CH foil to produce an X-ray line source, which then photoionise Ar gas. Produced Ar-photoionised plasma achieved photoionisation parameter > 100 erg-cm s-1, the regime of interest of several astrophysical cases.
We demonstrate that the use of a keV X-ray line source, rather than the usual quasi-blackbody radiation fields normally used in such experiments, has allowed for generating the same ratio of inner-shell to outer-shell photoionization as that expected from a blackbody source with ~keV spectral temperature.
We have compared results from our in-house plasma modelling code with those from Cloudy and found moderately good agreement for the time evolution of electron temperature and average ionisation.
