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Titolo:
Exploring the limits of the National Ignition Facility's capsule coupling
Autore:
Suter, L; Rothenberg, J; Munro, D; Van Wonterghem, B; Haan, S;
Indirizzi:
Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94551 USA Univ CalifLawrence Livermore Natl Lab Livermore CA USA 94551 A 94551 USA
Titolo Testata:
PHYSICS OF PLASMAS
fascicolo: 5, volume: 7, anno: 2000,
parte:, 2
pagine: 2092 - 2098
SICI:
1070-664X(200005)7:5<2092:ETLOTN>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ROSSELAND MEAN OPACITY; NOVA LASER SYSTEM; HIGH-TEMPERATURES; DRIVE; DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Suter, L Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94551 USA Univ Calif Lawrence Livermore Natl Lab Livermore CA USA 94551 SA
Citazione:
L. Suter et al., "Exploring the limits of the National Ignition Facility's capsule coupling", PHYS PLASMA, 7(5), 2000, pp. 2092-2098

Abstract

The original ignition "point designs" (circa 1992) for the National Ignition Facility (NIF) [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technol. 26, 755 (1994)] were made energetically conservative to provide margin for uncertainties in laser absorption, x-ray conversion efficiency and hohlraum-capsule coupling. Since that time, extensive experiments on Nova [J. T. Hunt and D. R. Speck, Opt. Eng. 28, 461 (1989)] and Omega [J. M. Soures et al., Phys. Plasmas 3, 2108 (1996)] and their related analysis indicate that NIF coupling efficiency may be almost "as good as we could hope for. " Given close agreement between experiment and theory/modeling, one can credibly explore target enhancements which couple more of NIFs energy to an ignition capsule. These include using optimized mixtures of materials to reduce x-ray wall losses, slightly reduced laser entrance holes, and laser operation strategies which increase the amount of energy one can extract from NIF. It is found that 3-4x increases in absorbed capsule energy appear possible, providing a potentially more robust target and similar to 10x increasein capsule yield. [S1070-664X(00)94805-5].

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Documento generato il 07/07/20 alle ore 05:51:56