Measurement and simulation of jet mass caused by a high-aspect ratio pertubation

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Inertial confinement fusion (ICF) capsule performance can be negatively impacted by the presence of hydrodynamic instabilities. To perform a gas fill on an ICF capsule current plans involve drilling a small hole and inserting a fill tube to inject the gas mixture into the capsule. This introduces a perturbation on the capsule, which can seed hydrodynamic instabilities. The small hole can cause jetting of the shell material into the gas, which might adversely affect the capsule performance. We have performed simulations and experiments to study the hydrodynamic evolution of jets from high-aspect ratio holes, such as the fill tube hole. ... continued below

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Keiter, Paul A; Cooley, James; Kyrala, George; Wilson, Doug; Blue, Brent; Elliott, Jim et al. January 1, 2009.

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Inertial confinement fusion (ICF) capsule performance can be negatively impacted by the presence of hydrodynamic instabilities. To perform a gas fill on an ICF capsule current plans involve drilling a small hole and inserting a fill tube to inject the gas mixture into the capsule. This introduces a perturbation on the capsule, which can seed hydrodynamic instabilities. The small hole can cause jetting of the shell material into the gas, which might adversely affect the capsule performance. We have performed simulations and experiments to study the hydrodynamic evolution of jets from high-aspect ratio holes, such as the fill tube hole. Although simulations using cold materials over predict the amount of mass in the jet, when a reasonable amount of preheat (< 1 eV) is introduced, the simulations are in better agreement with the experiment.

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  • Journal Name: Physics of Plasmas

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  • Report No.: LA-UR-09-01069
  • Report No.: LA-UR-09-1069
  • Grant Number: AC52-06NA25396
  • Office of Scientific & Technical Information Report Number: 956448
  • Archival Resource Key: ark:/67531/metadc931156

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  • January 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 5:55 p.m.

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Keiter, Paul A; Cooley, James; Kyrala, George; Wilson, Doug; Blue, Brent; Elliott, Jim et al. Measurement and simulation of jet mass caused by a high-aspect ratio pertubation, article, January 1, 2009; [New Mexico]. (digital.library.unt.edu/ark:/67531/metadc931156/: accessed April 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.