Ablative Stabilization of the Deceleration Phase Rayleigh-Taylor Instability

V. Lobatchev; R. Betti

doi:10.1103/PhysRevLett.85.4522

Ablative Stabilization of the Deceleration Phase Rayleigh-Taylor Instability

V. Lobatchev and R. Betti

Phys. Rev. Lett. 85, 4522 – Published 20 November 2000

Abstract

The growth rates of the deceleration-phase Rayleigh-Taylor instability for imploding inertial confinement fusion capsules are calculated and compared with the results of numerical simulations. It is found that the unstable spectrum and the growth rates are significantly reduced by the finite ablation flow at the shell's inner surface. For typical direct-drive capsules designed for the National Ignition Facility, the unstable spectrum exhibits a cutoff for $l \approx 90$ .

Received 26 July 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.4522

Authors & Affiliations

V. Lobatchev¹ and R. Betti²

¹Laboratory for Laser Energetics, Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623
²Laboratory for Laser Energetics, Departments of Mechanical Engineering and Physics and Astronomy, University of Rochester, Rochester, New York 14623