Reduced conduction cooling in high energy-density plasmas using ultrashort pulse laser heated thin foil targets

被引：14
|
作者：
Shepherd, R
More, R
Young, B
Price, D
Walling, R
Osterheld, A
Stewart, R
Kato, T
机构：
[1] Univ Calif Lawrence Livermore Natl Lab, Div 5, Livermore, CA 94550 USA
[2] Natl Inst Fus Sci, Nagoya, Aichi 46401, Japan
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 1997年 / 58卷 / 4-6期
关键词：
D O I：
10.1016/S0022-4073(97)00097-6
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We have conducted experiments to determine the effects of target thickness on the time history and spectra from short pulse laser produced plasmas. A reduced contribution to conduction cooling was achieved by using thin targets. The experiment was done using aluminum foils of thickness ranging from 250 Angstrom to 1250 Angstrom. The foils were heated with a 400 nm, 150 fs (FWHM), 250 mJ laser focused to a spot size of 2 mu m, resulting in a peak intensity of 5.3 x 10(19) W/cm(2). The 1s(2)-1s2p transition in He-like aluminum was temporally resolved using a 900 fs x-ray streak camera. An analytic model is derived to describe the time rate of change of the 1s(2)-1s2p transition in He-like aluminum. (C) 1997 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：911 / 916
页数：6
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