Novel characterization of capsule x-ray drive at the National Ignition Facility.

MacLaren, S A; Schneider, M B; Widmann, K; Hammer, J H; Yoxall, B E; Moody, J D; Bell, P M; Benedetti, L R; Bradley, D K; Edwards, M J; Guymer, T M; Hinkel, D E; Hsing, W W; Kervin, M L; Meezan, N B; Moore, A S; Ralph, J E

MacLaren, S A; Schneider, M B; Widmann, K; Hammer, J H; Yoxall, B E; Moody, J D; Bell, P M; Benedetti, L R; Bradley, D K; Edwards, M J; Guymer, T M; Hinkel, D E; Hsing, W W; Kervin, M L; Meezan, N B; Moore, A S; Ralph, J E.

Affiliation

MacLaren SA; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Schneider MB; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Widmann K; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Hammer JH; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Yoxall BE; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Moody JD; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Bell PM; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Benedetti LR; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Bradley DK; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Edwards MJ; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Guymer TM; Atomic Weapons Establishment, Aldermaston, Reading RG7 4PR, United Kingdom.
Hinkel DE; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Hsing WW; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Kervin ML; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Meezan NB; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
Moore AS; Atomic Weapons Establishment, Aldermaston, Reading RG7 4PR, United Kingdom.
Ralph JE; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.

Phys Rev Lett ; 112(10): 105003, 2014 Mar 14.

Article in En | MEDLINE | ID: mdl-24679301

ABSTRACT

ABSTRACT

Indirect drive experiments at the National Ignition Facility are designed to achieve fusion by imploding a fuel capsule with x rays from a laser-driven hohlraum. Previous experiments have been unable to determine whether a deficit in measured ablator implosion velocity relative to simulations is due to inadequate models of the hohlraum or ablator physics. ViewFactor experiments allow for the first time a direct measure of the x-ray drive from the capsule point of view. The experiments show a 15%-25% deficit relative to simulations and thus explain nearly all of the disagreement with the velocity data. In addition, the data from this open geometry provide much greater constraints on a predictive model of laser-driven hohlraum performance than the nominal ignition target.

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Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2014 Type: Article Affiliation country: United States

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