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Progress toward ignition with noncryogenic double-shell capsules

Varnum1, Delamater, Evans

  • 1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

Physical Review Letters
|September 16, 2000
PubMed
Summary
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Double-shell inertial confinement fusion capsules closely mimic one-dimensional simulations. Designs mitigating radiation asymmetries achieve high yields, approaching National Ignition Facility targets.

Area of Science:

  • Physics
  • Nuclear Fusion
  • Plasma Physics

Background:

  • Inertial confinement fusion (ICF) relies on imploding fuel capsules to achieve fusion conditions.
  • Achieving high convergence ratios and yields in ICF is crucial for ignition.
  • Radiation asymmetries, particularly from gold (Au) M-band, can significantly impact implosion performance.

Purpose of the Study:

  • To investigate the performance of double-shell ICF capsules.
  • To assess the impact of mitigating radiation asymmetries on implosion fidelity to simulations.
  • To compare capsule performance with one-dimensional (1D) hydrodynamics models.

Main Methods:

  • Utilizing double-shell capsules with a low-density separation region.
  • Employing capsule designs engineered to mitigate gold (Au) M-band radiation asymmetries.

Related Experiment Videos

  • Comparing experimental implosion results with 1D radiatively driven hydrodynamics simulations.

    • Main Results:

    • Observed that double-shell capsules closely follow 1D simulations.
    • Demonstrated that capsule designs mitigating Au M-band asymmetries show better agreement with 1D simulations.
    • Achieved over 50% of the unperturbed 1D calculated yield at a convergence ratio of 25.5 with one capsule design.

    Conclusions:

    • Double-shell capsule designs can achieve high performance and closely follow 1D predictions.
    • Mitigation of radiation asymmetries is critical for accurate ICF implosion modeling and performance.
    • The achieved performance is comparable to designs for ignition capsules at the National Ignition Facility.