X-ray area backlighter development at the National Ignition Facility

被引：27

作者：

Barrios, M. A. ^{[1
]}

Regan, S. P. ^{[2
]}

Fournier, K. B. ^{[1
]}

Epstein, R. ^{[2
]}

Smith, R. ^{[1
]}

Lazicki, A. ^{[1
]}

Rygg, R. ^{[1
]}

Fratanduono, D. E. ^{[1
]}

Eggert, J. ^{[1
]}

Park, H. -S. ^{[1
]}

Huntington, C. ^{[1
]}

Bradley, D. K. ^{[1
]}

Landen, O. L. ^{[1
]}

Collins, G. W. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 11期

关键词：

D O I：

10.1063/1.4891713

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

1D spectral imaging was used to characterize the K-shell emission of Z approximate to 30-35 and Z approximate to 40-42 laser-irradiated foils at the National Ignition Facility. Foils were driven with up to 60 kJ of 3 omega light, reaching laser irradiances on target between 0.5 and 20 x 10(15) W/cm(2). Laser-to-X-ray conversion efficiency (CE) into the He-alpha line (plus satellite emission) of 1.0%-1.5% and 0.15%-0.2% was measured for Z approximate to 30-32 and Z approximate to 40-42, respectively. Measured CE into He-alpha (plus satellite emission) of Br (Z = 35) compound foils (either KBr or RbBr) ranged between 0.16% and 0.29%. Measured spectra are compared with 1D non-local thermodynamic equilibrium atomic kinetic and radiation transport simulations, providing a fast and accurate predictive capability. (C) 2014 AIP Publishing LLC.

引用

页数：6

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