J
Joseph Ralph
Researcher at Lawrence Livermore National Laboratory
Publications - 132
Citations - 6040
Joseph Ralph is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: National Ignition Facility & Implosion. The author has an hindex of 39, co-authored 123 publications receiving 4818 citations. Previous affiliations of Joseph Ralph include University of California, Los Angeles.
Papers
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Journal ArticleDOI
Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility
S. W. Haan,J. D. Lindl,Debra Callahan,Daniel Clark,Jay D. Salmonson,B. A. Hammel,L. J. Atherton,Robert Cook,M. J. Edwards,Siegfried Glenzer,A. V. Hamza,S. P. Hatchett,Mark Herrmann,D. E. Hinkel,Darwin Ho,H. Huang,O. S. Jones,John Kline,G. A. Kyrala,Otto Landen,B. J. MacGowan,M. M. Marinak,D. D. Meyerhofer,Jose Milovich,K. A. Moreno,Edward I. Moses,D. H. Munro,A. Nikroo,R. E. Olson,Kyle Peterson,S. M. Pollaine,Joseph Ralph,Harry Robey,Brian Spears,P. T. Springer,L. J. Suter,Cliff Thomas,Richard Town,Roger Alan Vesey,S. V. Weber,H. Wilkens,Doug Wilson +41 more
TL;DR: Miller et al. as discussed by the authors proposed a point design for the initial ignition campaign on the National Ignition Facility (NIF) using D-T fusion fuel in an ablator of either CH with Ge doping, or Be with Cu.
Journal ArticleDOI
Self-Guided Laser Wakefield Acceleration beyond 1 GeV Using Ionization-Induced Injection
C. E. Clayton,Joseph Ralph,Felicie Albert,Ricardo Fonseca,Siegfried Glenzer,C. Joshi,Wei Lu,K. A. Marsh,Samuel Martins,Warren Mori,Art Pak,Frank Tsung,B. B. Pollock,B. B. Pollock,Jason Ross,Jason Ross,Luis O. Silva,Dustin Froula +17 more
TL;DR: Computer simulations confirm that it is the K-shell electrons of oxygen that are ionized and injected into the wake and accelerated to beyond 1 GeV energy.
Journal ArticleDOI
Progress Towards Ignition on the National Ignition Facility
M. J. Edwards,P. K. Patel,J. D. Lindl,L. J. Atherton,Siegfried Glenzer,S. W. Haan,J. D. Kilkenny,O. L. Landen,Edward I. Moses,A. Nikroo,R. D. Petrasso,T. C. Sangster,P. T. Springer,Steven H. Batha,R. Benedetti,L. A. Bernstein,Riccardo Betti,D. L. Bleuel,T. R. Boehly,D. K. Bradley,J. A. Caggiano,D. A. Callahan,P. M. Celliers,C. J. Cerjan,K. C. Chen,Daniel Clark,Gilbert Collins,E. L. Dewald,Laurent Divol,S. N. Dixit,Tilo Doeppner,D. H. Edgell,James E. Fair,Michael Farrell,R. J. Fortner,Johan Frenje,M. Gatu Johnson,E. M. Giraldez,V. Yu. Glebov,Gary Grim,B. A. Hammel,A. V. Hamza,D. R. Harding,S. P. Hatchett,N. Hein,Hans W. Herrmann,Damien Hicks,D. E. Hinkel,M. Hoppe,W. W. Hsing,Nobuhiko Izumi,B. Jacoby,O. S. Jones,Daniel H. Kalantar,Robert L. Kauffman,John Kline,J. P. Knauer,J. A. Koch,B. J. Kozioziemski,G. A. Kyrala,K. N. LaFortune,S. Le Pape,R. J. Leeper,R. A. Lerche,T. Ma,B. J. MacGowan,A. J. Mackinnon,Andrew MacPhee,Evan Mapoles,M. M. Marinak,M. Mauldin,P. W. McKenty,M. Meezan,Pierre Michel,Jose Milovich,J. D. Moody,Matthew Moran,D. H. Munro,C. L. Olson,Kathy Opachich,Art Pak,T. G. Parham,H.-S. Park,Joseph Ralph,Sean Regan,Bruce Remington,H. G. Rinderknecht,Harry Robey,M. D. Rosen,Steven Ross,Jay D. Salmonson,J. D. Sater,D. H. Schneider,Fredrick Seguin,Scott Sepke,D. A. Shaughnessy,V. A. Smalyuk,Brian Spears,Christian Stoeckl,Wolfgang Stoeffl,L. J. Suter,Cliff Thomas,R. Tommasini,Richard Town,S. V. Weber,Paul J. Wegner,K. Widman,Mark D. Wilke,Doug Wilson,Charles Yeamans,Alex Zylstra +110 more
TL;DR: In this paper, a low-Z capsule filled with deuterium-tritium (DT) fuel via laser indirect-drive inertial confinement fusion and demonstrate fusion ignition and propagating thermonuclear burn with a net energy gain of ∼5-10 (fusion yield/input laser energy).
Journal ArticleDOI
Demonstration of a narrow energy spread, ∼0.5 GeV electron beam from a two-stage laser wakefield accelerator.
B. B. Pollock,B. B. Pollock,C. E. Clayton,Joseph Ralph,Felicie Albert,Asher Davidson,Laurent Divol,C. Filip,Siegfried Glenzer,Karla-Luise Herpoldt,Weixing Lu,Weixing Lu,K. A. Marsh,J. Meinecke,Warren Mori,Art Pak,T. C. Rensink,Jason Ross,Jessica Shaw,George Tynan,C. Joshi,Dustin Froula +21 more
TL;DR: In this article, the authors used ionization-induced injection to inject charge into the wake of relativistic plasma waves (the wake) over tens of vacuum diffraction lengths.
Journal ArticleDOI
Onset of hydrodynamic mix in high-velocity, highly compressed inertial confinement fusion implosions.
T. Ma,P. K. Patel,Nobuhiko Izumi,P. T. Springer,M. H. Key,L. J. Atherton,Laura Robin Benedetti,D. K. Bradley,D. A. Callahan,P. M. Celliers,C. J. Cerjan,Daniel Clark,E. L. Dewald,S. N. Dixit,Tilo Döppner,D. H. Edgell,Reuben Epstein,S. M. Glenn,Gary Grim,S. W. Haan,B. A. Hammel,Damien Hicks,W. W. Hsing,O. S. Jones,Shahab Khan,J. D. Kilkenny,John Kline,G. A. Kyrala,Otto Landen,S. Le Pape,B. J. MacGowan,A. J. Mackinnon,Andrew MacPhee,Nathan Meezan,J. D. Moody,Art Pak,T. G. Parham,H.-S. Park,Joseph Ralph,Sean Regan,Bruce Remington,Harry Robey,Jason Ross,Brian Spears,V. A. Smalyuk,L. J. Suter,R. Tommasini,Richard Town,S. V. Weber,J. D. Lindl,Melissa Edwards,Siegfried Glenzer,Edward I. Moses +52 more
TL;DR: The comparison with radiation-hydrodynamic modeling indicates that low mode asymmetries and increased ablator surface perturbations may be responsible for the current performance of deuterium-tritium inertial confinement fusion implosion experiments.