Session NO6: Laser-Plasma Coupling at Long Scale Length
9:30 AM–12:18 PM, Wednesday, November 14, 2007
Rosen Centre Hotel Room: Salon 5/6
Chair: Robert Kirkwood, Lawrence Livermore National Laboratory
Abstract ID: BAPS.2007.DPP.NO6.2
Abstract: NO6.00002 : An Assessment of Laser-Plasma Instabilities in NIF Ignition Hohlraums with Different Capsule Ablators.
9:42 AM–9:54 AM
(Lawrence Livermore National Laboratory, Livermore, CA)
The NIF ignition point design uses a cryogenic DT fuel enclosed within a copper-doped beryllium ablator. The capsule is placed in a gold-uranium cocktail hohlraum driven to a peak drive temperature of 285eV. As part of a system optimization study we are examining two alternative ablator materials: high-density carbon, and germanium-doped plastic. High-density carbon, for a given capsule size, absorbs most x-ray energy. Changing the ablator material alters the plasma conditions inside the hohlraum, consequently modifying the laser-plasma interactions (LPI). We report on LASNEX simulations of hohlraums with these three ablator materials, quantifying the bulk plasma conditions, and use them to estimate the relative risk for LPI.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.DPP.NO6.2