Contrasting physics in wire array z pinch sources of 1-20 keV emission on the Z facility

被引：31

作者：

Ampleford, D. J. ^{[1
]}

Jones, B. ^{[1
]}

Jennings, C. A. ^{[1
]}

Hansen, S. B. ^{[1
]}

Cuneo, M. E. ^{[1
]}

Harvey-Thompson, A. J. ^{[1
]}

Rochau, G. A. ^{[1
]}

Coverdale, C. A. ^{[1
]}

Laspe, A. R. ^{[1
]}

Flanagan, T. M. ^{[1
]}

Moore, N. W. ^{[1
]}

Sinars, D. B. ^{[1
]}

Lamppa, D. C. ^{[1
]}

Harding, E. C. ^{[1
]}

Thornhill, J. W. ^{[2
]}

Giuliani, J. L. ^{[2
]}

Chong, Y. -K. ^{[2
]}

Apruzese, J. P. ^{[2
]}

Velikovich, A. L. ^{[2
]}

Dasgupta, A. ^{[2
]}

Ouart, N. ^{[2
]}

Sygar, W. A. ^{[1
]}

Savage, M. E. ^{[1
]}

Moore, J. K. ^{[1
]}

Focia, R. ^{[1
]}

Wagoner, T. C. ^{[1
]}

Killebrew, K. L. ^{[1
]}

Edens, A. D. ^{[1
]}

Dunham, G. S. ^{[1
]}

Jones, M. C. ^{[1
]}

Lake, P. W. ^{[1
]}

Nielsen, D. S. ^{[1
]}

Wu, M. ^{[1
]}

Carlson, A. L. ^{[1
]}

Kernahan, M. D. ^{[1
]}

Ball, C. R. ^{[1
]}

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

Mulville, T. D. ^{[1
]}

Breden, E. W. ^{[1
]}

Speas, C. S. ^{[1
]}

Olivas, G. ^{[1
]}

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

York, A. J. ^{[1
]}

Justus, D. W. ^{[1
]}

Cisneros, J. C. ^{[1
]}

Strizic, T. ^{[1
]}

Reneker, J. ^{[1
]}

Cleveland, M. ^{[1
]}

Vigil, M. P. ^{[1
]}

Robertson, G. ^{[1
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

[2] Naval Res Lab, Washington, DC 20375 USA

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 05期

关键词：

K-SHELL RADIATION; X-RAY POWER; DYNAMICS; PLASMAS;

D O I：

10.1063/1.4876621

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：

a Imploding wire arrays on the 20 MA Z generator have recently provided some of the most powerful and energetic laboratory sources of multi-keV photons, including similar to 375 kJ of Al K-shell emission (h nu similar to 1-2 keV), similar to 80 kJ of stainless steel K-shell emission (h nu similar to 5-9 keV) and a kJ-level of Mo K-shell emission (h nu similar to 17 keV). While the global implosion dynamics of these different wire arrays are very similar, the physical process that dominates the emission from these x-ray sources fall into three broad categories. Al wire arrays produce a column of plasma with densities up to similar to 3 x 10(21) ions/cm(3), where opacity inhibits the escape of K-shell photons. Significant structure from instabilities can reduce the density and increase the surface area, therefore increase the K-shell emission. In contrast, stainless steel wire arrays operate in a regime where achieving a high pinch temperature (achieved by thermalizing a high implosion kinetic energy) is critical and, while opacity is present, it has less impact on the pinch emissivity. At higher photon energies, line emission associated with inner shell ionization due to energetic electrons becomes important. (C) 2014 AIP Publishing LLC.

引用

页数：10

共 39 条

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