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Title: Kinetic physics in ICF: present understanding and future directions

Abstract

Kinetic physics has the potential to impact the performance of indirect-drive inertial confinement fusion (ICF) experiments. Systematic anomalies in the National Ignition Facility implosion dataset have been identified in which kinetic physics may play a role, including inferred missing energy in the hohlraum, drive asymmetry in near-vacuum hohlraums, low areal density and high burn-averaged ion temperatures (T i ) compared with mainline simulations, and low ratios of the DD-neutron and DT-neutron yields and inferred T i . Several components of ICF implosions are likely to be influenced or dominated by kinetic physics: laser-plasma interactions in the LEH and hohlraum interior; the hohlraum wall blowoff, blowoff/gas and blowoff/ablator interfaces; the ablator and ablator/ice interface; and the DT fuel all present conditions in which kinetic physics can significantly affect the dynamics. This review presents the assembled experimental data and simulation results to date, which indicate that the effects of long mean-free-path plasma phenomena and self-generated electromagnetic fields may have a significant impact in ICF targets. Finally, simulation and experimental efforts are proposed to definitively quantify the importance of these effects at ignition-relevant conditions, including priorities for ongoing study.

Authors:
ORCiD logo [1];  [1];  [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1438636
Report Number(s):
LLNL-JRNL-742100; LLNL-JRNL-755501
Journal ID: ISSN 0741-3335
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 6; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; kinetic physics; inertial confinement fusion; high-energy-density plasmas

Citation Formats

Rinderknecht, Hans G., Amendt, P. A., Wilks, S. C., and Collins, G. Kinetic physics in ICF: present understanding and future directions. United States: N. p., 2018. Web. doi:10.1088/1361-6587/aab79f.
Rinderknecht, Hans G., Amendt, P. A., Wilks, S. C., & Collins, G. Kinetic physics in ICF: present understanding and future directions. United States. doi:10.1088/1361-6587/aab79f.
Rinderknecht, Hans G., Amendt, P. A., Wilks, S. C., and Collins, G. Tue . "Kinetic physics in ICF: present understanding and future directions". United States. doi:10.1088/1361-6587/aab79f.
@article{osti_1438636,
title = {Kinetic physics in ICF: present understanding and future directions},
author = {Rinderknecht, Hans G. and Amendt, P. A. and Wilks, S. C. and Collins, G.},
abstractNote = {Kinetic physics has the potential to impact the performance of indirect-drive inertial confinement fusion (ICF) experiments. Systematic anomalies in the National Ignition Facility implosion dataset have been identified in which kinetic physics may play a role, including inferred missing energy in the hohlraum, drive asymmetry in near-vacuum hohlraums, low areal density and high burn-averaged ion temperatures (Ti ) compared with mainline simulations, and low ratios of the DD-neutron and DT-neutron yields and inferred Ti . Several components of ICF implosions are likely to be influenced or dominated by kinetic physics: laser-plasma interactions in the LEH and hohlraum interior; the hohlraum wall blowoff, blowoff/gas and blowoff/ablator interfaces; the ablator and ablator/ice interface; and the DT fuel all present conditions in which kinetic physics can significantly affect the dynamics. This review presents the assembled experimental data and simulation results to date, which indicate that the effects of long mean-free-path plasma phenomena and self-generated electromagnetic fields may have a significant impact in ICF targets. Finally, simulation and experimental efforts are proposed to definitively quantify the importance of these effects at ignition-relevant conditions, including priorities for ongoing study.},
doi = {10.1088/1361-6587/aab79f},
journal = {Plasma Physics and Controlled Fusion},
number = 6,
volume = 60,
place = {United States},
year = {Tue Apr 10 00:00:00 EDT 2018},
month = {Tue Apr 10 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 10, 2019
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