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

Abstract

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.

Authors:
 [1];  [2];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [3];  [3];  [3];  [3];  [3];  [3] more »;  [4]; ORCiD logo [5] « less
+ Show Author Affiliations
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Engility Corp., Chantilly, VA (United States)
  3. Naval Research Laboratory, Washington, DC (United States)
  4. Alameda Applied Sciences Corp., San Leandro, CA (United States)
  5. Evergreen Hill Sciences, Philomath, OR (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1497656
Alternate Identifier(s):
OSTI ID: 1421012
Report Number(s):
SAND-2014-17429J
Journal ID: ISSN 1070-664X; 672041
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 2; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

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., and Coleman, P. L. The effect of gradients at stagnation on K-shell x-ray line emission in high-current Ar gas-puff implosions. United States: N. p., 2015. Web. doi:10.1063/1.4913350.
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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. The effect of gradients at stagnation on K-shell x-ray line emission in high-current Ar gas-puff implosions. United States. https://doi.org/10.1063/1.4913350
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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., and Coleman, P. L. Wed . "The effect of gradients at stagnation on K-shell x-ray line emission in high-current Ar gas-puff implosions". United States. https://doi.org/10.1063/1.4913350. https://www.osti.gov/servlets/purl/1497656.
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@article{osti_1497656,
title = {The effect of gradients at stagnation on K-shell x-ray line emission in high-current Ar gas-puff implosions},
author = {Jones, Brent M. and Apruzese, J. P. and Harvey-Thompson, Adam James and Ampleford, David J. and Jennings, Christopher Ashley and Hansen, Stephanie B. and Moore, Nathan W. and Lamppa, Derek C. and Johnson, Drew and Jones, Michael C. and Waisman, Eduardo Mario and Coverdale, Christine A. and Cuneo, Michael E. and Rochau, Gregory A. and Giuliani, J. L. and Thornhill, J. W. and Ouart, N. D. and Chong, Y. K. and Velikovich, A. L. and Dasgupta, A. and Krishnan, M. and Coleman, P. L.},
abstractNote = {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.},
doi = {10.1063/1.4913350},
journal = {Physics of Plasmas},
number = 2,
volume = 22,
place = {United States},
year = {Wed Feb 18 00:00:00 EST 2015},
month = {Wed Feb 18 00:00:00 EST 2015}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.4913350
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Cited by: 20 works
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Figures / Tables:

Figure 1 Figure 1: Time-integrated spectra from three identically configured Z Ar gas puff shots, 2559 (red), 2560 (green), and 2561 (blue). A convex KAP crystal was used for 2559, while a higher-spectral-resolution quartz 1011 crystal was used for 2560-2561.
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Spectroscopic analysis of Cu wire array implosions on the refurbished Z generator
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    Works referencing / citing this record:

    Simulations of Ar gas-puff Z-pinch radiation sources with double shells and central jets on the Z generator
    journal, October 2016

    • Tangri, V.; Harvey-Thompson, A. J.; Giuliani, J. L.
    • Physics of Plasmas, Vol. 23, Issue 10
    • DOI: 10.1063/1.4965235
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      Table II (p. 4)table
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