Computational modeling of Krypton gas puffs with tailored mass density profiles on Z

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.

doi:10.1063/1.4921154

Title: Computational modeling of Krypton gas puffs with tailored mass density profiles on Z

Journal Article · Mon May 18 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4921154· OSTI ID:1235346

Jennings, Christopher A. ^[1]; Ampleford, David J. ^[1]; Lamppa, Derek C. ^[1]; Hansen, Stephanie B. ^[1]; Jones, Brent Manley ^[1]; Harvey-Thompson, Adam James ^[1]; Jobe, Marc Ronald Lee ^[1]; Reneker, Joseph ^[1]; Rochau, Gregory A. ^[1]; Cuneo, Michael Edward ^[1]; Strizic, T. ^[1]

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

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.

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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; AC04- 94AL85000

OSTI ID:: 1235346

Alternate ID(s):: OSTI ID: 1228174

Report Number(s):: SAND-2015-0769J; PHPAEN; 562633

Journal Information:: Physics of Plasmas, Vol. 22, Issue 5; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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References (31)

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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
Enhancing the x-ray output of a single-wire explosion with a gas-puff based plasma opening switch Engelbrecht, Joseph T.; Ouart, Nicholas D.; Qi, Niansheng Physics of Plasmas, Vol. 25, Issue 2 https://doi.org/10.1063/1.5019378	journal	February 2018
Observations of the magneto-Rayleigh-Taylor instability and shock dynamics in gas-puff Z-pinch experiments de Grouchy, P. W. L.; Kusse, B. R.; Banasek, J. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5032084	journal	July 2018

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