Journal ArticleDOI
Influence of spatial and temporal laser beam smoothing on stimulated brillouin scattering in filamentary laser light.
Richard Berger,Barbara F. Lasinski,A. B. Langdon,T. B. Kaiser,Bedros Afeyan,Bruce I. Cohen,Charles H. Still,E. A. Williams +7 more
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Three-dimensional simulations are presented which calculate the time-dependent, self-consistent evolution of filamentation and stimulated Brillouin backscatter in nonuniform laser beams with intense hot spots.Abstract:
Three-dimensional simulations are presented which calculate the time-dependent, self-consistent evolution of filamentation and stimulated Brillouin backscatter (SBBS) in nonuniform laser beams with intense hot spots. The simulations show significant reflectivity ( $g$1%) for modest average-intensity gain exponents (5--10). Many hot spots cooperate to produce a total SBBS amplification that increases with the plasma length as well as hot-spot length. Temporal beam smoothing with bandwidth comparable to the SBBS growth rate substantially reduces the nonuniform-laser-beam reflectivity.read more
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Journal ArticleDOI
Development of the indirect‐drive approach to inertial confinement fusion and the target physics basis for ignition and gain
TL;DR: In this paper, an approach to fusion that relies on either electron conduction (direct drive) or x rays (indirect drive) for energy transport to drive an implosion is presented.
Proceedings ArticleDOI
There goes the neighborhood: performance degradation due to nearby jobs
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Journal ArticleDOI
Laser–plasma interactions in ignition‐scale hohlraum plasmas
B. J. MacGowan,Bedros Afeyan,Christina Back,Richard Berger,Guy Bonnaud,M. Casanova,Bruce I. Cohen,D. E. Desenne,D. F. DuBois,A. G. Dulieu,Kent Estabrook,Juan C. Fernández,Siegfried Glenzer,D. E. Hinkel,T. B. Kaiser,Daniel H. Kalantar,Robert L. Kauffman,R. K. Kirkwood,William L. Kruer,A. B. Langdon,Barbara F. Lasinski,D. S. Montgomery,J. D. Moody,D. H. Munro,L. V. Powers,H. A. Rose,Christophe Rousseaux,Robert Turner,Bernhard H. Wilde,Scott Wilks,E. A. Williams +30 more
TL;DR: In this paper, the authors investigated the scattering of laser light by SBS and SRS as a function of beam smoothing and plasma conditions in the National Ignition Facility (NIF).
Journal ArticleDOI
Resonantly excited nonlinear ion waves
TL;DR: In this paper, a Boltzmann fluid model is used for the electrons and a particle-in-cell representation for the ions to simulate ion wave phenomena efficiently, while retaining a fully kinetic representation of the ions, and a new dispersion relation is derived describing the parametric instability of ion waves, evidence for which is observed in their simulations.
Journal ArticleDOI
Filamentation and forward Brillouin scatter of entire smoothed and aberrated laser beams
TL;DR: In this paper, the authors show the effect of the large scale structure on the fine-scale speckle and the larger scale envelope intensity of the laser beam on the behavior of the entire beam.
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