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

Journal Article · Sun Feb 15 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4913350· OSTI ID:22408045

Harvey-Thompson, A. J.; Ampleford, D. J.; Jennings, C. A.; Hansen, S. B.; Moore, N. W.; Lamppa, D. C.; Johnson, D.; Jones, M. C.; Waisman, E. M.; Coverdale, C. A.; Cuneo, M. E.; Rochau, G. A. ^[1]; Apruzese, J. P. ^[2]; Giuliani, J. L.; Thornhill, J. W.; Ouart, N. D.; Chong, Y. K.; Velikovich, A. L.; Dasgupta, A. ^[3]; others, and

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
2. Engility Corp., Chantilly, Virginia 20151 (United States)
3. Naval Research Laboratory, Washington, DC 20375 (United States)

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. 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.

• OSTI ID: 22408045
• Journal Information: Physics of Plasmas, Vol. 22, Issue 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
CURRENTS
EMISSION SPECTRA
IMPLOSIONS
K SHELL
KEV RANGE
PHOTONS
PLASMA
PLASMA INSTABILITY
PULSES
SOFT X RADIATION
TIME RESOLUTION