K-shell spectroscopy of plasmas created by intense laser irradiation of micron-scale pyramid and sphere targets

被引：6

作者：

Kneip, S. ^{[1
]}

Cho, B. I. ^{[1
]}

Symes, D. R. ^{[1
]}

Sumeruk, H. A. ^{[1
]}

Dyer, G. ^{[1
]}

Churina, I. V. ^{[1
]}

Belolipetski, A. V. ^{[1
]}

Henig, A. ^{[1
]}

Wehrhan, O. ^{[2
]}

Foerster, E. ^{[2
]}

Donnelly, T. D. ^{[3
]}

Ditrnire, T. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Phys, Texas Ctr High Intens Laser Sci, Austin, TX 78712 USA

[2] Univ Jena, Xray Opt Grp, Inst Opt & Quantum Elect, D-07743 Jena, Germany

[3] Harvey Mudd Coll, Dept Phys, Claremont, CA 91711 USA

来源：

HIGH ENERGY DENSITY PHYSICS | 2008年 / 4卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

K-alpha X-rays; Laser plasma;

D O I：

10.1016/j.hedp.2007.10.002

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：

K-shell spectra of targets with microstructured features irradiated by an intense femtosecond laser have been studied. Examination of K-alpha emission from laser irradiated Si targets coated with micron-scale polystyrene spheres indicates that the emission is enhanced by a factor of similar to 3 over emission from planar solids. Sphere-coated targets also emit K-shell He-like Si radiation indicating the presence of a hot dense plasma beneath the microspheres. Furthermore, K-alpha from Ti foils coupled to micro-tipped reentrant pyramid and wedge shaped targets has been studied, however, no significant enhancement of the K-alpha yield is observed for these kinds of targets. These studies illustrate that, with correct tailoring of the target surface, field enhancements can be used to increase X-ray emission from intensely irradiated targets. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：41 / 48

页数：8

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