Modeling X-Ray Photoionized Plasmas Produced at the Sandia Z-Facility |
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| Authors: | P A M Van Hoof M E Foord R F Heeter J E Bailey H-K Chung M E Cuneo W H Goldstein V Jonauskas F P Keenan R Kisielius D A Liedahl C Ramsbottom S J Rose P T Springer R S Thoe |
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| Institution: | (1) APS Division, Physics Department, Queen’s University, Belfast, BT7 INN, Northern Ireland;(2) University of California, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA;(3) Sandia National Laboratory, Albuquerque, NM 37185, USA;(4) Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom |
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| Abstract: | In experiments at the high-power Z-facility at Sandia National Laboratory in Albuquerque, New Mexico, we have been able to
produce a low density photoionized laboratory plasma of Fe mixed with NaF. The conditions in the experiment allow a meaningful
comparison with X-ray emission from astrophysical sources. The charge state distributions of Fe, Na and F are determined in
this plasma using high resolution X-ray spectroscopy. Independent measurements of the density and radiation flux indicate
unprecedented values for the ionization parameter ξ = 20–25 erg cm s−1 under nearly steady-state conditions. First comparisons of the measured charge state distributions with X-ray photoionization
models show reasonable agreement, although many questions remain. |
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| Keywords: | photoionization X-ray spectroscopy |
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