Journal ArticleDOI
Performance of 1-THz-bandwidth, two-dimensional smoothing by spectral dispersion and polarization smoothing of high-power, solid-state laser beams
Sean Regan,J. A. Marozas,R. Stephen Craxton,John H. Kelly,William R. Donaldson,Paul A. Jaanimagi,D. Jacobs-Perkins,R. L. Keck,Terrance J. Kessler,David D. Meyerhofer,T. Craig Sangster,W. Seka,Vladimir Smalyuk,S. Skupsky,Jonathan D. Zuegel +14 more
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In this article, beam smoothing with spectral dispersion and polarization smoothing on the 60-beam, 30-kJ, 351-nm OMEGA laser system is reported.Abstract:
Laser beam smoothing achieved with 1-THz-bandwidth, two-dimensional smoothing by spectral dispersion and polarization smoothing on the 60-beam, 30-kJ, 351-nm OMEGA laser system is reported. These beam-smoothing techniques are directly applicable to direct-drive ignition target designs for the 192-beam, 1.8-MJ, 351-nm National Ignition Facility. Equivalent-target-plane images for constant-intensity laser pulses of varying duration were used to determine the smoothing. The properties of the phase plates, frequency modulators, and birefringent wedges were simulated and found to be in good agreement with the measurements.read more
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Journal ArticleDOI
Direct-drive inertial confinement fusion: A review
R. S. Craxton,Karen S. Anderson,T. R. Boehly,Valeri Goncharov,D. R. Harding,J. P. Knauer,R. L. McCrory,P. W. McKenty,D. D. Meyerhofer,J.F. Myatt,Andrew J. Schmitt,John D. Sethian,R. W. Short,S. Skupsky,W. Theobald,William L. Kruer,Kazuo Tanaka,Riccardo Betti,Tim Collins,J. A. Delettrez,Suxing Hu,J. A. Marozas,A. V. Maximov,D. T. Michel,P. B. Radha,Sean Regan,T. C. Sangster,W. Seka,A. A. Solodov,J. M. Soures,Christian Stoeckl,Jonathan D. Zuegel +31 more
TL;DR: The direct-drive, laser-based approach to inertial confinement fusion (ICF) is reviewed from its inception following the demonstration of the first laser to its implementation on the present generation of high-power lasers as mentioned in this paper.
Journal ArticleDOI
Inertial-confinement fusion with lasers
Riccardo Betti,Omar Hurricane +1 more
TL;DR: A review of the current state of the art in inertial confinement fusion research can be found in this paper, where the authors describe the underlying physical principles of fusion energy production from controlled nuclear fusion reactions.
Journal ArticleDOI
Inertial confinement fusion implosions with imposed magnetic field compression using the OMEGA Laser
Matthias Hohenberger,Po-Yu Chang,Gennady Fiksel,J. P. Knauer,Riccardo Betti,F. J. Marshall,D. D. Meyerhofer,Fredrick Seguin,Fredrick Seguin,R. D. Petrasso,R. D. Petrasso +10 more
TL;DR: Chang et al. as discussed by the authors applied laser-driven magnetic-flux compression to inertial confinement fusion (ICF) targets to enhance the implosion performance, and the experimentally observed ion temperature was enhanced by 15%, and the neutron yield was increased by 30%, compared to nonmagnetized implosions.
Journal ArticleDOI
Compressing magnetic fields with high-energy lasers
J. P. Knauer,O. V. Gotchev,Po-Yu Chang,D. D. Meyerhofer,O. Polomarov,Riccardo Betti,Johan Frenje,Johan Frenje,Chikang Li,Chikang Li,Mario Manuel,Mario Manuel,R. D. Petrasso,R. D. Petrasso,J. R. Rygg,Fredrick Seguin,Fredrick Seguin +16 more
TL;DR: Boehly et al. as discussed by the authors used a laser-driven magnetic field compression to produce a magnetic field of tens of megaGauss, which was used to implode cylindrical CH targets filled with deuterium gas.
Journal ArticleDOI
Experimental methods for warm dense matter research
TL;DR: A broad review of the most recent experimental work carried out in this field with a special focus on the methods used is provided in this paper, where all typical schemes used to produce WDM are discussed in detail.
References
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Journal ArticleDOI
Initial performance results of the OMEGA laser system
Thomas Boehly,D. L. Brown,R. S. Craxton,R. L. Keck,James Knauer,John H. Kelly,Terrance J. Kessler,S. A. Kumpan,S. J. Loucks,Samuel A. Letzring,F. J. Marshall,R. L. McCrory,S. F. B. Morse,W. Seka,J. M. Soures,C. P. Verdon +15 more
TL;DR: Omega is a 60-terawatt, 60-beam, frequency-tripled Nd:glass laser system designed to perform precision direct-drive inertial-confinement-fusion experiments and the acceptance tests demonstrated exceptional performance throughout the system.
Journal ArticleDOI
Improved laser‐beam uniformity using the angular dispersion of frequency‐modulated light
TL;DR: In this paper, the beam is broken up into beamlets, using a phase plate, such that the beamlet diffraction-limited focal spot is the size of the target.
Journal ArticleDOI
Direct-drive laser fusion: Status and prospects
Stephen E. Bodner,Denis Colombant,John H. Gardner,Robert Lehmberg,Stephen P. Obenschain,Lee Phillips,Andrew J. Schmitt,John D. Sethian,R. L. McCrory,W. Seka,C. P. Verdon,James Knauer,Bedros Afeyan,Howard T. Powell +13 more
TL;DR: In this article, techniques have been developed to improve the uniformity of the laser focal profile, to reduce the ablative Rayleigh-Taylor instability, and to suppress the various laser-plasma instabilities.
Journal ArticleDOI
Reduction of laser imprinting using polarization smoothing on a solid-state fusion laser
T. R. Boehly,Vladimir Smalyuk,D. D. Meyerhofer,J. P. Knauer,D. K. Bradley,R. S. Craxton,M. J. Guardalben,S. Skupsky,Terrance J. Kessler +8 more
TL;DR: In this article, a birefringent optical wedge splits the individual laser beams into two orthogonally polarized beams that, when coupled with a distributed phase plate, produce two speckle patterns shifted with respect to one another.
Journal ArticleDOI
A review of the ablative stabilization of the Rayleigh--Taylor instability in regimes relevant to inertial confinement fusion
J. D. Kilkenny,S. G. Glendinning,S. W. Haan,B. A. Hammel,J. D. Lindl,D. H. Munro,Bruce Remington,S. V. Weber,J. P. Knauer,C. P. Verdon +9 more
TL;DR: In this paper, the authors used both x-ray and smoothed laser drive to accelerate foils and measured the growth of small initial modulations on the foils for growth factors up to 60 for direct drive and 80 for indirect drive.