We present a benchmark measurement of the electron density profile in the region where the electron density is 1019cm-3 and where the bulk of extreme ultraviolet (EUV) emission occurs from isotropically expanding spherical high-Z gadolinium plasmas. It was found that, due to opacity effects, the observed EUV emission is mostly produced from an underdense region. We have analyzed time-resolved emission spectra with the aid of atomic structure calculations and find the multiple ion charge states around 18+ during the laser pulse irradiation.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)