Design of the opacity spectrometer for opacity measurements at the National Ignition Facility

Recent experiments at the Sandia National Laboratory Z facility have called into question models used in calculatingopacity, of importance for modeling stellar interiors. An effort is being made to reproduce these results at the National Ignition Facility (NIF). These experiments require a newX-rayopacityspectrometer (OpSpec) spanning 540 eV –2100 eV with a resolving power E/ΔE> 700. The design of the OpSpec is presented. Photometric calculations based on expectedopacity data are also presented. First use on NIF is expected in September 2016.

Source: Review of Scientific Instruments - October 3, 2016 Category: Physics Authors: P. W. Ross, R. F. Heeter, M. F. Ahmed, E. Dodd, E. J. Huffman, D. A. Liedahl, J. A. King, Y. P. Opachich, M. B. Schneider and T. S. Perry Source Type: research