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Title: Kinetic mix mechanisms in shock-driven inertial confinement fusion implosions

Shock-driven implosions of thin-shell capsules, or ''exploding pushers,'' generate low-density, high-temperature plasmas in which hydrodynamic instability growth is negligible and kinetic effects can play an important role. Data from implosions of thin deuterated-plastic shells with hydroequivalent D3He gas fills ranging from pure deuterium to pure 3He [H. G. Rinderknecht et al., Phys. Rev. Lett. 112, 135001 (2014)] were obtained to evaluate non-hydrodynamic fuel-shell mix mechanisms. Simulations of the experiments including reduced ion kinetic models support ion diffusion as an explanation for these data. Several additional kinetic mechanisms are investigated and compared to the data to determine which are important in the experiments. Shock acceleration of shell deuterons is estimated to introduce mix less than or comparable to the amount required to explain the data. Beam-target mechanisms are found to produce yields at most an order of magnitude less than the observations
Authors:
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  1. MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States). Plasma Science and Fusion Center
  2. Lab. for Laser Energetics, Rochester, NY (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. General Atomics, San Diego, CA (United States)
Publication Date:
OSTI Identifier:
1172490
Grant/Contract Number:
NA0002035; NA0001857; FC52-08NA28752
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY