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

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...

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Bibliographic Details
Published in:Physics of plasmas 2009-01
Main Authors: Keiter, Paul A, Cooley, James, Kyrala, George, Wilson, Doug, Blue, Brent, Elliott, Jim, Edwards, John, Robey, Harry, Spears, Brian
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASPECT RATIO
CAPSULES
DISTURBANCES
HYDRODYNAMICS
INERTIAL CONFINEMENT
JET MODEL
SIMULATION
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Summary: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.
ISSN:1070-664X
1089-7674