Physics – Plasma Physics
Scientific paper
Nov 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aps..dpp.fi203s&link_type=abstract
American Physical Society, 41st Annual Meeting of the Division of Plasma Physics, November 15-19, 1999 Seattle, WA, abstract #FI
Physics
Plasma Physics
Scientific paper
As a step towards a predictive modeling capability for laser-plasma interactions in National Ignition Facility (NIF) scale plasmas, we plan to simulate filamentation, stimulated Brillouin and Raman scattering, and beam bending of an entire Nova beam in an ICF target with the massively parallel code pF3d. pF3d includes 3D nonlinear Eulerian hydrodynamics coupled to paraxial light propagation of incident and scattered light.(R. L. Berger, et. al.), Phys. Plasmas 5, 4337 (1998). Simulation predictions have been and will be tested with the results from a number of experiments. With this improved modeling capability, we will evaluate beam smoothing techniques for NIF, such as kineform phase plate (KPP) optimization and smoothing by spectral dispersion (SSD). We have simulated filamentation and forward SBS in plasma volumes (56 μm × 900 μm × 2.5 mm) approaching the size of a single f/8 NOVA beam. For the first time, we directly simulate the dramatic differences in propagation and beam steering between unsmoothed beams as used in experiments and combinations of random phase plates (RPP), KPP, and SSD. We study the effects of large and small scale beam structure on each other via self focusing, spraying, and beam bending.
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