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

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

Journal Article · Tue Feb 17 23:00:00 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.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (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
OSTI ID: 22408045

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

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

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

Country of Publication:: United States

Language:: English

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