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Title: Developing one-dimensional implosions for inertial confinement fusion science

Journal Article · · High Power Laser Science and Engineering
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
+ Show Author Affiliations

Experiments on the National Ignition Facility show that multi-dimensional effects currently dominate the implosion performance. Low mode implosion symmetry and hydrodynamic instabilities seeded by capsule mounting features appear to be two key limiting factors for implosion performance. One reason these factors have a large impact on the performance of inertial confinement fusion implosions is the high convergence required to achieve high fusion gains. To tackle these problems, a predictable implosion platform is needed meaning experiments must trade-off high gain for performance. LANL has adopted three main approaches to develop a one-dimensional (1D) implosion platform where 1D means measured yield over the 1D clean calculation. A high adiabat, low convergence platform is being developed using beryllium capsules enabling larger case-to-capsule ratios to improve symmetry. The second approach is liquid fuel layers using wetted foam targets. With liquid fuel layers, the implosion convergence can be controlled via the initial vapor pressure set by the target fielding temperature. The last method is double shell targets. For double shells, the smaller inner shell houses the DT fuel and the convergence of this cavity is relatively small compared to hot spot ignition. However, double shell targets have a different set of trade-off versus advantages. As a result, details for each of these approaches are described.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
Grant/Contract Number:
AC52-06NA25396; AC52-07NA27344
OSTI ID:
1340972
Alternate ID(s):
OSTI ID: 1788345
Report Number(s):
LA-UR--16-23156
Journal Information:
High Power Laser Science and Engineering, Journal Name: High Power Laser Science and Engineering Vol. 4; ISSN 2095-4719
Publisher:
Cambridge University PressCopyright Statement
Country of Publication:
United States
Language:
English

References (21)

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Cited By (1)

Enhanced energy coupling for indirectly driven inertial confinement fusion journal October 2018

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
beryllium capsules
double shells
inertial confinement fusion
liquid layers