Computational modeling of Krypton gas puffs with tailored mass density profiles on Z
Abstract
Large diameter multi-shell gas puffs rapidly imploded by high current (~20 MA, ~100 ns) on the Z generator of Sandia National Laboratories are able to produce high-intensity Krypton K-shell emission at ~13 keV. Efficiently radiating at these high photon energies is a significant challenge which requires the careful design and optimization of the gas distribution. To facilitate this, we hydrodynamically model the gas flow out of the nozzle and then model its implosion using a 3-dimensional resistive, radiative MHD code (GORGON). This approach enables us to iterate between modeling the implosion and gas flow from the nozzle to optimize radiative output from this combined system. Furthermore, guided by our implosion calculations, we have designed gas profiles that help mitigate disruption from Magneto-Rayleigh–Taylor implosion instabilities, while preserving sufficient kinetic energy to thermalize to the high temperatures required for K-shell emission.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (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:
- 1235346
- Alternate Identifier(s):
- OSTI ID: 1228174
- Report Number(s):
- SAND-2015-0769J
Journal ID: ISSN 1070-664X; PHPAEN; 562633
- Grant/Contract Number:
- AC04-94AL85000; AC04- 94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 22; Journal Issue: 5; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 97 MATHEMATICS AND COMPUTING; electrical resistivity; electric currents; experiment design; hydrological modeling; photons
Citation Formats
Jennings, Christopher A., Ampleford, David J., Lamppa, Derek C., Hansen, Stephanie B., Jones, Brent Manley, Harvey-Thompson, Adam James, Jobe, Marc Ronald Lee, Reneker, Joseph, Rochau, Gregory A., Cuneo, Michael Edward, and Strizic, T. Computational modeling of Krypton gas puffs with tailored mass density profiles on Z. United States: N. p., 2015.
Web. doi:10.1063/1.4921154.
Jennings, Christopher A., Ampleford, David J., Lamppa, Derek C., Hansen, Stephanie B., Jones, Brent Manley, Harvey-Thompson, Adam James, Jobe, Marc Ronald Lee, Reneker, Joseph, Rochau, Gregory A., Cuneo, Michael Edward, & Strizic, T. Computational modeling of Krypton gas puffs with tailored mass density profiles on Z. United States. https://doi.org/10.1063/1.4921154
Jennings, Christopher A., Ampleford, David J., Lamppa, Derek C., Hansen, Stephanie B., Jones, Brent Manley, Harvey-Thompson, Adam James, Jobe, Marc Ronald Lee, Reneker, Joseph, Rochau, Gregory A., Cuneo, Michael Edward, and Strizic, T. Mon .
"Computational modeling of Krypton gas puffs with tailored mass density profiles on Z". United States. https://doi.org/10.1063/1.4921154. https://www.osti.gov/servlets/purl/1235346.
@article{osti_1235346,
title = {Computational modeling of Krypton gas puffs with tailored mass density profiles on Z},
author = {Jennings, Christopher A. and Ampleford, David J. and Lamppa, Derek C. and Hansen, Stephanie B. and Jones, Brent Manley and Harvey-Thompson, Adam James and Jobe, Marc Ronald Lee and Reneker, Joseph and Rochau, Gregory A. and Cuneo, Michael Edward and Strizic, T.},
abstractNote = {Large diameter multi-shell gas puffs rapidly imploded by high current (~20 MA, ~100 ns) on the Z generator of Sandia National Laboratories are able to produce high-intensity Krypton K-shell emission at ~13 keV. Efficiently radiating at these high photon energies is a significant challenge which requires the careful design and optimization of the gas distribution. To facilitate this, we hydrodynamically model the gas flow out of the nozzle and then model its implosion using a 3-dimensional resistive, radiative MHD code (GORGON). This approach enables us to iterate between modeling the implosion and gas flow from the nozzle to optimize radiative output from this combined system. Furthermore, guided by our implosion calculations, we have designed gas profiles that help mitigate disruption from Magneto-Rayleigh–Taylor implosion instabilities, while preserving sufficient kinetic energy to thermalize to the high temperatures required for K-shell emission.},
doi = {10.1063/1.4921154},
journal = {Physics of Plasmas},
number = 5,
volume = 22,
place = {United States},
year = {Mon May 18 00:00:00 EDT 2015},
month = {Mon May 18 00:00:00 EDT 2015}
}
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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
Enhancing the x-ray output of a single-wire explosion with a gas-puff based plasma opening switch
journal, February 2018
- Engelbrecht, Joseph T.; Ouart, Nicholas D.; Qi, Niansheng
- Physics of Plasmas, Vol. 25, Issue 2
Observations of the magneto-Rayleigh-Taylor instability and shock dynamics in gas-puff Z-pinch experiments
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