Propagation distance-resolved characteristics of filament-induced copper plasma

被引：23

作者：

Ghebregziabher, Isaac ^{[1
]}

Hartig, Kyle C. ^{[1
]}

Jovanovic, Igor ^{[1
,2
]}

机构：

[1] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA

[2] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

来源：

OPTICS EXPRESS | 2016年 / 24卷 / 05期

关键词：

INDUCED BREAKDOWN SPECTROSCOPY; LASER-ABLATION; PULSE; AIR;

D O I：

10.1364/OE.24.005263

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Copper plasma generated at different filament-copper interaction points was characterized by spectroscopic, acoustic, and imaging measurements. The longitudinal variation of the filament intensity was qualitatively determined by acoustic measurements in air. The maximum plasma temperature was measured at the location of peak filament intensity, corresponding to the maximum mean electron energy during plasma formation. The highest copper plasma density was measured past the location of the maximum electron density in the filament, where spectral broadening of the filament leads to enhanced ionization. Acoustic measurements in air and on solid target were correlated to reconstructed plasma properties. Optimal line emission is measured near the geometric focus of the lens used to produce the filament. (C) 2016 Optical Society of America

引用

页码：5263 / 5276

页数：14

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