APPLICATION OF ESCAPE PROBABILITY TO LINE TRANSFER IN LASER-PRODUCED PLASMAS

被引：31

作者：

LEE, YT ^{[1
]}

LONDON, RA ^{[1
]}

ZIMMERMAN, GB ^{[1
]}

HAGELSTEIN, PL ^{[1
]}

机构：

[1] MIT,CAMBRIDGE,MA 02140

来源：

PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1990年 / 2卷 / 11期

关键词：

D O I：

10.1063/1.859396

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The application of an escape probability method to treat transfer of optically thick lines in laser-produced plasmas in plane-parallel geometry is described. The escape probability calculated is valid in a plasma with any locally linear velocity profile. It reduces to the standard result for a static plasma and to the result of Sobolev [Sov. Astron. Astrophys. J. 1, 678 (1957)] for large ion velocity gradients. As examples, escape probability is applied to model the effect of optically thick line trapping in both exploding foil and ablating massive slab targets. Compared to detailed numerical calculations for the line transfer in these targets, the escape probability gives quite accurate estimates. This can be understood in terms of the large Doppler shifts in the line profiles that are generated by the ion velocity in the plasmas.

引用

页码：2731 / 2740

页数：10

共 29 条

[1] X-RAY CONVERSION EFFICIENCY AS A FUNCTION OF ATOMIC-NUMBER FOR 0.26-MU-M-LASER - IRRADIATED TARGETS [J].