Spatially resolved and time-integrated x-ray spectroscopy, combined with modeling of the spectra with detailed radiation kinetics and transport, is a powerful method to study the conditions in a hot moving plasma. K-shell argon spectra were measured from gas puff implosions with different center jet masses on the 1 MA COBRA generator at Cornell University. The outer to inner plenum pressures (1 and 3 psia, respectively) were the same for all shots producing an outer to inner mass ratio of 1:1. This paper uses non-local thermodynamic equilibrium kinetic modeling to infer the ion density, electron temperature, K-shell radiating mass, and K-shell powers from stagnating argon gas puff z-pinch implosion. We find that the implosions with a center jet produced bright spot regions of plasma with higher temperature and density than those without a jet.
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October 2016
Research Article|
October 19 2016
Radiative properties of argon gas puff z-pinch implosions on COBRA
N. D. Ouart;
N. D. Ouart
1Plasma Physics Division,
Naval Research Laboratory
, Washington DC 20375, USA
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P. W. L. de Grouchy
;
P. W. L. de Grouchy
a)
2Laboratory of Plasma Studies,
Cornell University
, Ithaca, New York 14853, USA
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N. Qi;
N. Qi
b)
2Laboratory of Plasma Studies,
Cornell University
, Ithaca, New York 14853, USA
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J. L. Giuliani
;
J. L. Giuliani
1Plasma Physics Division,
Naval Research Laboratory
, Washington DC 20375, USA
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A. Dasgupta;
A. Dasgupta
1Plasma Physics Division,
Naval Research Laboratory
, Washington DC 20375, USA
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T. A. Shelkovenko;
T. A. Shelkovenko
c)
2Laboratory of Plasma Studies,
Cornell University
, Ithaca, New York 14853, USA
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S. A. Pikuz
;
S. A. Pikuz
c)
2Laboratory of Plasma Studies,
Cornell University
, Ithaca, New York 14853, USA
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D. A. Hammer
;
D. A. Hammer
2Laboratory of Plasma Studies,
Cornell University
, Ithaca, New York 14853, USA
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B. R. Kusse;
B. R. Kusse
2Laboratory of Plasma Studies,
Cornell University
, Ithaca, New York 14853, USA
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J. P. Apruzese;
J. P. Apruzese
3
Consultant to NRL through Engility Corp.
, Chantilly, Virginia 20151, USA
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R. W. Clark
R. W. Clark
4
Berkeley Research Associates
, Beltsville, Maryland 20705, USA
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Phys. Plasmas 23, 101202 (2016)
Article history
Received:
May 18 2016
Accepted:
September 16 2016
Citation
N. D. Ouart, P. W. L. de Grouchy, N. Qi, J. L. Giuliani, A. Dasgupta, T. A. Shelkovenko, S. A. Pikuz, D. A. Hammer, B. R. Kusse, J. P. Apruzese, R. W. Clark; Radiative properties of argon gas puff z-pinch implosions on COBRA. Phys. Plasmas 1 October 2016; 23 (10): 101202. https://doi.org/10.1063/1.4965244
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