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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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Experimental basis for laser-plasma interactions in ignition hohlraums at the National Ignition Facility
Dustin Froula,Laurent Divol,R. A. London,Richard Berger,Tilo Doeppner,Nathan Meezan,J. E. Ralph,James Ross,L. J. Suter,Siegfried Glenzer +9 more
TL;DR: In this article, a series of laser plasma interaction experiments at OMEGA (LLE, Rochester) using gas-filled hohlraums shed light on the behavior of stimulated Raman scattering and stimulated Brillouin scattering at various plasma conditions encountered in indirect drive ignition designs.
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Anomalous Absorption of High-Energy Green Laser Light in High- Z Plasmas
Siegfried Glenzer,Wojciech Rozmus,Wojciech Rozmus,V. Yu. Bychenkov,John Moody,J. R. Albritton,Richard Berger,A. V. Brantov,Mark Foord,B. J. MacGowan,R. K. Kirkwood,Hector A. Baldis,E. A. Williams +12 more
TL;DR: Both the laser light absorption and the resulting increase of the electron temperature, which was measured independently with Thomson scattering, have been successfully modeled by including enhanced collisions due to heat-flux driven ion acoustic fluctuations.
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Progress in Long Scale Length Laser-Plasma Interactions
Siegfried Glenzer,P. A. Arnold,G. Bardsley,Richard Berger,G. Bonanno,T. Borger,D. Bower,M. Bowers,R. Bryant,Stephen Buckman,S. C. Burkhart,K. M. Campbell,M. Chrisp,Bruce I. Cohen,Carmen Constantin,F. Cooper,J. R. Cox,E. L. Dewald,Laurent Divol,S. N. Dixit,J. Duncan,David C. Eder,J. Edwards,G. Erbert,B. Felker,J. Fornes,G. Frieders,Dustin Froula,S. Gardner,C. Gates,Marta Zubiaur González,S. Grace,Gianluca Gregori,A. Greenwood,R. L. Griffith,Todd H. Hall,B. A. Hammel,C. A. Haynam,G. Heestand,M.A. Henesian,G. Hermes,Denise Hinkel,J. P. Holder,F. Holdner,G. Holtmeier,W. Hsing,S. Huber,T. James,S. C. Johnson,O. S. Jones,Daniel H. Kalantar,J. H. Kamperschroer,Robert L. Kauffman,T. Kelleher,J. Knight,R. K. Kirkwood,William L. Kruer,W. Labiak,Otto Landen,A. B. Langdon,Steven H. Langer,D. Latray,A. Lee,F. D. Lee,D. Lund,B. J. MacGowan,S. R. Marshall,J. McBride,T. McCarville,L. McGrew,A. J. Mackinnon,S. Mahavandi,Kenneth R. Manes,C. Marshall,J. Menapace,E. Mertens,N. Meezan,G. Miller,S. Montelongo,J. D. Moody,Edward I. Moses,D. H. Munro,John R. Murray,J. Neumann,M. Newton,E. Ng,Christoph Niemann,A. Nikitin,P. Opsahl,E. Padilla,T. G. Parham,G. Parrish,C. Petty,M. Polk,C. Powell,Imants P. Reinbachs,V. Rekow,R. Rinnert,B. Riordan,M. Rhodes,V. Roberts,Harry Robey,G. Ross,S. Sailors,R. Saunders,Mark J. Schmitt,Marilyn Schneider,S. Shiromizu,Mary L. Spaeth,A. Stephens,B. Still,L. J. Suter,G.L. Tietbohl,M. Tobin,J. Tuck,B. M. Van Wonterghem,R. Vidal,D. Voloshin,R. J. Wallace,Paul J. Wegner,Pamela K. Whitman,E. A. Williams,K. Williams,K. Winward,K. Work,B. Young,P. Young,P. G. Zapata,R. E. Bahr,W. Seka,Juan C. Fernandez,D. S. Montgomery,Harvey A. Rose +132 more
TL;DR: The first experiments on the National Ignition Facility (NIF) have employed the first four beams to measure propagation and laser backscattering losses in large ignition-size plasmas as mentioned in this paper.
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Stimulated Raman and Brillouin scattering of polarization-smoothed and temporally smoothed laser beams
TL;DR: In this article, a spatio-temporal smoothing scheme was proposed to control filamentation and stimulated Raman and Brillouin scattering in laser fusion experiments, where the effect of smoothing must include the competition among all three instabilities.
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Stochastic ion heating from many overlapping laser beams in fusion plasmas.
Pierre Michel,Wojciech Rozmus,E. A. Williams,Laurent Divol,Richard Berger,Richard Town,Siegfried Glenzer,Debra Callahan +7 more
TL;DR: It is shown through numerical simulations and analytical results that overlapping multiple laser beams in plasmas can lead to strong stochastic ion heating from many (~N(2)) electrostatic perturbations driven by beat waves between pairs of laser beams.