Modeling X-ray photoionized plasmas produced at the Sandia Z-facility

被引:0
作者
Van Hoof, PAM [1 ]
Foord, ME
Heeter, RF
Bailey, JE
Chung, HK
Cuneo, ME
Goldstein, WH
Jonauskas, V
Keenan, FP
Kisielius, R
Liedahl, DA
Ramsbottom, C
Rose, SJ
Springer, PT
Thoe, RS
机构
[1] Queens Univ Belfast, Dept Phys, APS Div, Belfast BT7 1NN, Antrim, North Ireland
[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA
[3] Sandia Natl Labs, Albuquerque, NM 37185 USA
[4] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England
关键词
photoionization; X-ray; spectroscopy;
D O I
10.1007/s10509-005-3925-1
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 xi = 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.
引用
收藏
页码:147 / 153
页数:7
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