STUDY OF K-ALPHA ABSORPTION STRUCTURES IN A SUBCRITICAL-DENSITY LASER-PRODUCED PLASMA

被引：16

作者：

BACK, CA

CHENAISPOPOVICS, C

RENAUDIN, P

GEINDRE, JP

AUDEBERT, P

GAUTHIER, JC

机构：

[1] Ecole Polytechnique, Laboratoire de Physique des Milieux Ionisés

来源：

PHYSICAL REVIEW A | 1992年 / 46卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.46.3405

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The study of K alpha line absorption by point-projection backlighting is presented for a laser-produced aluminum plasma at electronic densities below 5 X 10(21) cm-3. The appearance of ionic species as a function of distance from the target is measured absolutely by the use of a knife edge as a spatial fiducial. These data are used to determine the gradient of the average charge as a function of space. A non-local-thermodynamic-equilibrium ionization model has been developed to determine temperature and densities consistent with this measure. Comparisons with hydrodynamic codes are presented, along with a discussion of the inferred temperature.

引用

页码：3405 / 3412

页数：8

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