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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 |
| Affiliation: | (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 |
| 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. |
| Keywords: | photoionization X-ray spectroscopy |
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