R
Richard Berger
Researcher at Lawrence Livermore National Laboratory
Publications - 144
Citations - 5985
Richard Berger is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Laser & Inertial confinement fusion. The author has an hindex of 36, co-authored 144 publications receiving 5377 citations.
Papers
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Journal ArticleDOI
Investigation and modeling of optics damage in high-power laser systems caused by light backscattered in plasma at the target
Thomas Chapman,Pierre Michel,J. M. Di Nicola,Richard Berger,Pamela K. Whitman,J. D. Moody,Kenneth R. Manes,Mary L. Spaeth,M. A. Belyaev,Cliff Thomas,B. J. MacGowan +10 more
TL;DR: In this paper, the authors show that the observed cumulative burn pattern on mirrors at the National Ignition Facility (NIF) due to stimulated Brillouin scattering (SBS) at the target is explained using detailed simulations.
Journal ArticleDOI
Beyond the gain exponent: Effect of damping, scale length, and speckle length on stimulated scatter.
Richard Berger,L. J. Suter,Laurent Divol,R. A. London,Thomas Chapman,Dustin Froula,Nathan Meezan,Paul Neumayer,Siegfried Glenzer +8 more
TL;DR: Three-dimensional wave propagation simulations and experiments show that the gain exponent, an often used metric to assess the likelihood of stimulated Brillouin scatter, is insufficient and must be augmented with another parameter, Nr, the ratio of the resonance length, Lres, to the laser speckle length.
Journal ArticleDOI
Scaling of saturated stimulated Raman scattering with temperature and intensity in ignition scale plasmas
R. K. Kirkwood,Richard Berger,C. G. R. Geddes,J. D. Moody,B. J. MacGowan,Siegfried Glenzer,Kent Estabrook,C. Decker,Otto Landen +8 more
TL;DR: In this paper, the scaling of the stimulated Raman scattering (SRS) with laser intensity and plasma electron temperature under the conditions expected in ignition experiments was studied. But the scaling was not shown to follow a power law with a small exponent (of order 1).
Journal ArticleDOI
Stimulated Brillouin backscattering and ion acoustic wave secondary instability
TL;DR: In this paper, the secondary instability of a finite-amplitude ion acoustic wave (IAW) affecting the saturation of stimulated Brillouin backscattering (SBS) of laser light in a plasma is presented.
Journal ArticleDOI
Deficiencies in compression and yield in x-ray-driven implosions
C. A. Thomas,E. M. Campbell,Kevin Baker,Daniel Casey,Matthias Hohenberger,A. L. Kritcher,Brian Spears,Shahab Khan,Ryan Nora,D. T. Woods,Jose Milovich,Richard Berger,David Strozzi,Darwin Ho,David C. Clark,Benjamin Bachmann,Laura Robin Benedetti,R. M. Bionta,Peter M. Celliers,David N. Fittinghoff,Gary Grim,Robert Hatarik,Nobuhiko Izumi,G. A. Kyrala,Tammy Ma,Marius Millot,Sabrina Nagel,P. K. Patel,C. B. Yeamans,A. Nikroo,Max Tabak,M. Gatu Johnson,Petr Volegov,S. M. Finnegan +33 more
TL;DR: In this paper, x-ray-driven implosions that are designed to be less sensitive to 2D and 3D effects in Hohlraum and capsule physics are analyzed.