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Title: 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 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.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3]
  1. Los Alamos National Laboratory
  2. LLNL/GA
  3. LLNL
Publication Date:
OSTI Identifier:
956448
Report Number(s):
LA-UR-09-01069; LA-UR-09-1069
Journal ID: ISSN 1070-664X; PHPAEN; TRN: US1004069
DOE Contract Number:
AC52-06NA25396
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas
Research Org:
Los Alamos National Laboratory (LANL)
Sponsoring Org:
DOE
Country of Publication:
United States
Language:
English
Subject:
70; ASPECT RATIO; DISTURBANCES; HYDRODYNAMICS; INERTIAL CONFINEMENT; PERFORMANCE; SIMULATION; JET MODEL; CAPSULES