Magnetized Ablative Rayleigh-Taylor Instability in 3-D

Abstract

3-D extended-MHD simulations of the magnetized ablative Rayleigh-Taylor instability are presented for the first time. Previous 2-D simulations claiming perturbation suppression by magnetic tension are shown to be misleading, as they do not include the most unstable dimension. For perturbation modes along the applied field direction, the magnetic field simultaneously reduces ablative stabilization and adds magnetic tension stabilization; the stabilizing term is found to dominate for applied fields >5T, with both effects increasing in importance at short wavelengths. For modes perpendicular to the applied field, magnetic tension does not directly stabilize the perturbation, but can result in moderately slower growth due to the perturbation appearing 2-D (albeit in a different orientation to 2-D ICF simulations). In cases where thermal ablative stabilization is dominant the applied field increases the peak bubble-spike height. Resistive diffusion is shown to be important for short wavelengths and long timescales, reducing the effectiveness of tension stabilization.

References in corpus (8)

• The evolution of magnetic tower jets in the laboratory
• Preserving Monotonicity in Anisotropic Diffusion
• Nonlinear Evolution of the Magnetohydrodynamic Rayleigh-Taylor Instability
• Symmetric set of transport coefficients for collisional magnetized plasma
• Biermann Battery Magnetic Fields in ICF Capsules: Total Magnetic Flux Generation
• Measuring magnetic flux suppression in high-power laser-plasma interactions
• Burn regimes in the hydrodynamic scaling of perturbed inertial confinement fusion hotspots
• Magnetic field generation from composition gradients in inertial confinement fusion fuel

Cited by in corpus (7)

• Magnetized ICF Implosions: Scaling of Temperature and Yield Enhancement
• Particle acceleration by magnetic Rayleigh-Taylor instability: mechanism for flares in black-hole accretion flows
• Three-dimensional direct numerical simulation of free-surface magnetohydrodynamic wave turbulence
• Non-Linear Ablative Rayleigh-Taylor Instability: Increased Growth due to Self-Generated Magnetic Fields
• Burn Propagation in Magnetized High-Yield Inertial Fusion
• Hot-spot model for inertial confinement fusion implosions with an applied magnetic field
• Spherical compression of an applied magnetic field in inertial confinement fusion