Computational modeling of Krypton gas puffs with tailored mass density profiles on Za)
| Autor: | Derek C. Lamppa, Christopher Jennings, Thomas Strizic, A. J. Harvey-Thompson, J. Reneker, Gregory Rochau, Brent Manley Jones, Marc Ronald Lee Jobe, M. E. Cuneo, D. J. Ampleford, Stephanie Hansen |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Nuclear engineering Nozzle Krypton Implosion chemistry.chemical_element Condensed Matter Physics Kinetic energy Physics::Fluid Dynamics chemistry Physics::Plasma Physics Z-pinch Radiative transfer Rayleigh–Taylor instability Magnetohydrodynamics Atomic physics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Physics of Plasmas. 22:056316 |
| ISSN: | 1089-7674 1070-664X |
| DOI: | 10.1063/1.4921154 |
| Popis: | 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. 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. |
| Databáze: | OpenAIRE |
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