The effect of gradients at stagnation on K-shell x-ray line emission in high-current Ar gas-puff implosions

Jones, Brent M.; Apruzese, J. P.; Harvey-Thompson, Adam James; Ampleford, David J.; Jennings, Christopher Ashley; Hansen, Stephanie B.; Moore, Nathan W.; Lamppa, Derek C.; Johnson, Drew; Jones, Michael C.; Waisman, Eduardo Mario; Coverdale, Christine A.; Cuneo, Michael E.; Rochau, Gregory A.; Giuliani, J. L.; Thornhill, J. W.; Ouart, N. D.; Chong, Y. K.; Velikovich, A. L.; Dasgupta, A.; Krishnan, M.; Coleman, P. L.

doi:10.1063/1.4913350

Title: The effect of gradients at stagnation on K-shell x-ray line emission in high-current Ar gas-puff implosions

Journal Article · Wed Feb 18 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4913350· OSTI ID:1497656

Jones, Brent M. ^[1]; Apruzese, J. P. ^[2]; Harvey-Thompson, Adam James ^[1];

^[1]; Jennings, Christopher Ashley ^[1]; Hansen, Stephanie B. ^[1]; Moore, Nathan W. ^[1]; Lamppa, Derek C. ^[1]; Johnson, Drew ^[1];

^[1]; Waisman, Eduardo Mario ^[1]; Coverdale, Christine A. ^[1]; Cuneo, Michael E. ^[1]; Rochau, Gregory A. ^[1]; Giuliani, J. L. ^[3]; Thornhill, J. W. ^[3]; Ouart, N. D. ^[3]; Chong, Y. K. ^[3]; Velikovich, A. L. ^[3]; Dasgupta, A. ^[3] more »

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Engility Corp., Chantilly, VA (United States)
Naval Research Laboratory, Washington, DC (United States)
Alameda Applied Sciences Corp., San Leandro, CA (United States)
Evergreen Hill Sciences, Philomath, OR (United States)

We report that argon gas puffs have produced 330 kJ ± 9% of x-ray radiation above 3 keV photon energy in fast z-pinch implosions, with remarkably reproducible K-shell spectra and power pulses. This reproducibility in x-ray production is particularly significant in light of the variations in instability evolution observed between experiments. Lastly, soft x-ray power measurements and K-shell line ratios from a time-resolved spectrum at peak x-ray power suggest that plasma gradients in these high-mass pinches may limit the K-shell radiating mass, K-shell power, and K-shell yield from high-current gas puffs.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1497656

Alternate ID(s):: OSTI ID: 1421012

Report Number(s):: SAND-2014-17429J; 672041

Journal Information:: Physics of Plasmas, Vol. 22, Issue 2; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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Simulations of Ar gas-puff Z-pinch radiation sources with double shells and central jets on the Z generator Tangri, V.; Harvey-Thompson, A. J.; Giuliani, J. L. Physics of Plasmas, Vol. 23, Issue 10 https://doi.org/10.1063/1.4965235	journal	October 2016