L- and M-shell absorption measurements of radiatively heated Fe plasma

Measurements of iron-plasma absorption spectrum over 150-1200 eV photon energy range were reported at temperature T (72 +/- 4) eV. The electron temperature was diagnosed with the absorption spectrum of aluminum mixed with iron. The density was not diagnosed directly but obtained from a radiative hydrodynamic simulation with the Multi-1D code. The broad photon energy range enables simultaneous observation of the L-shell and M-shell transitions that dominate the radiation transport at this temperature. The spectrally resolved transmission data were compared to the detailed-configuration-accounting model calculations and reasonable agreement was found. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769103]