Absorption experiments on X-ray-heated magnesium and germanium constrained samples

Detailed Theoretical Investigations on the L-Shell Absorption of Open-M-Shell Germanium Plasmas:Effect of Autoionization Resonance Broadening

“…Germanium is one of the absorption and switching material in indirectly driven inertial confinement fusion and therefore its radiative property is of great interest both experimentally and theoretically [1][2][3][4][5][6][7][8][9]. The radiative opacity of open-M-shell germanium plasmas are of particular experimental interest, especially in the region of 2p-3d and 2p-4d transition arrays.…”

“…Foster et al [1] measured the L-shell absorption spectrum of a germanium plasma, which was generated by radiation heating using thermal X radiation from a laser-produced gold plasma. Tracer elements of Al and Mg were used to characterize the temperature (76 eV) and density (0.05 g/cm 3 ) of the plasma. Perry et al [2] experimentally measured the Xray absorption of germanium plasmas at a lower temperature of about 38 eV.…”

“…Perry et al [2] experimentally measured the Xray absorption of germanium plasmas at a lower temperature of about 38 eV. Renaudin et al [3] measured the absorption spectra of germanium plasma in the 0.8 -1.1 nm range. The germanium sample was radiatively heated by a gold hohlraum.…”

“…The germanium sample was radiatively heated by a gold hohlraum. Recently, Loisel et al [4] experimentally measured the radiative opacity of medium Z element plasmas including germanium in the X-ray region (0.8 -1.8 nm) at temperatures between 15 and 25 eV and densities between 2 and 10 mg/cm 3 . The experimental observations provide valuable data to validate different approximations made in the opacity calculations.…”

“…In these statistical methods, the line width caused by the statistical approach are generally dominant and therefore a Gaussian line shape is used. Renaudin et al [3] took into account of the term structure using UTA statistical methods and a detailed line accounting approach in pure jj coupling with orbital relaxation effect being considered. In their work, a Gaussian shape is used, which assumed that Doppler broadening dominates all other broadening mechanisms.…”