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Shock-Augmented Ignition Using Indirect Drive

POSTER

Abstract

Shock ignition[1] is an ignition concept that uses a late-time power spike to drive a strong shock that collides with a rebounding primary shock driven by the capsule compression process to ignition. This has been thought unfeasible with indirect drive because the thermal capacity of the hohlraum makes it difficult to produce sufficiently fast rises in hohlraum temperature. The “shock-augmented” pulse shape, a concept proposed by Scott et al.,[2] enables the generation of a strong shock strength at drive power and intensity much below those needed for shock ignition. This is possible by decreasing the drive immediately before the ignition spike. This talk shows that the shock-augmented approach relaxes the rate at which hohlraum temperature is required to change, making indirect-drive shock-augmented ignition possible. One-dimensional radiation-hydrodynamics simulations illustrate the drive requirements to achieve ignition and that ignition is robust with respect to the timing and strength of the igniting shock.
 
[1] R. Betti et al., Phys. Rev. Lett. 98, 155001 (2007).


[2] R. Scott et al., Bull. Am. Phys. Soc. 65, GO09.00010 (2020).

Presenters

  • William T Trickey

    York Plasma Institute, Department of Physics, University of York, University of York, University of Rochester, Laboratory for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics

Authors

  • William T Trickey

    York Plasma Institute, Department of Physics, University of York, University of York, University of Rochester, Laboratory for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics

  • Nigel C Woolsey

    York Plasma Institute, Department of Physics, University of York, University of York

  • Robbie H Scott

    Rutherford Appleton Laboratory, STFC Rutherford Appleton Laboratory, Rutherford Appleton Lab, Central Laser Facility, RAL, STFC, Central Laser Facility