Demonstration of High Performance in Layered Deuterium-Tritium Capsule Implosions in Uranium Hohlraums at the National Ignition Facility

被引：108

作者：

Doeppner, T. ^{[1
]}

Callahan, D. A. ^{[1
]}

Hurricane, O. A. ^{[1
]}

Hinkel, D. E. ^{[1
]}

Ma, T. ^{[1
]}

Park, H. -S. ^{[1
]}

Hopkins, L. F. Berzak ^{[1
]}

Casey, D. T. ^{[1
]}

Celliers, P. ^{[1
]}

Dewald, E. L. ^{[1
]}

Dittrich, T. R. ^{[1
]}

Haan, S. W. ^{[1
]}

Kritcher, A. L. ^{[1
]}

MacPhee, A. ^{[1
]}

Le Pape, S. ^{[1
]}

Pak, A. ^{[1
]}

Patel, P. K. ^{[1
]}

Springer, P. T. ^{[1
]}

Salmonson, J. D. ^{[1
]}

Tommasini, R. ^{[1
]}

Benedetti, L. R. ^{[1
]}

Bond, E. ^{[1
]}

Bradley, D. K. ^{[1
]}

Caggiano, J. ^{[1
]}

Church, J. ^{[1
]}

Dixit, S. ^{[1
]}

Edgell, D. ^{[2
]}

Edwards, M. J. ^{[1
]}

Fittinghoff, D. N. ^{[1
]}

Frenje, J. ^{[3
]}

Johnson, M. Gatu ^{[3
]}

Grim, G. ^{[4
]}

Hatarik, R. ^{[1
]}

Havre, M. ^{[5
]}

Herrmann, H. ^{[4
]}

Izumi, N. ^{[1
]}

Khan, S. F. ^{[1
]}

Kline, J. L. ^{[4
]}

Knauer, J. ^{[2
]}

Kyrala, G. A. ^{[4
]}

Landen, O. L. ^{[1
]}

Merrill, F. E. ^{[4
]}

Moody, J. ^{[1
]}

Moore, A. S. ^{[6
]}

Nikroo, A. ^{[5
]}

Ralph, J. E. ^{[1
]}

Remington, B. A. ^{[1
]}

Robey, H. F. ^{[1
]}

Sayre, D. ^{[1
]}

Schneider, M. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[2] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

[3] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[5] Gen Atom Co, San Diego, CA 92121 USA

[6] Atom Weap Estab, Aldermaston RG7, England

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 05期

关键词：

Compendex;

D O I：

10.1103/PhysRevLett.115.055001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first layered deuterium-tritium (DT) capsule implosions indirectly driven by a "high-foot" laser pulse that were fielded in depleted uranium hohlraums at the National Ignition Facility. Recently, high-foot implosions have demonstrated improved resistance to ablation-front Rayleigh-Taylor instability induced mixing of ablator material into the DT hot spot [Hurricane et al., Nature (London) 506, 343 (2014)]. Uranium hohlraums provide a higher albedo and thus an increased drive equivalent to an additional 25 TW laser power at the peak of the drive compared to standard gold hohlraums leading to higher implosion velocity. Additionally, we observe an improved hot-spot shape closer to round which indicates enhanced drive from the waist. In contrast to findings in the National Ignition Campaign, now all of our highest performing experiments have been done in uranium hohlraums and achieved total yields approaching 10(16) neutrons where more than 50% of the yield was due to additional heating of alpha particles stopping in the DT fuel.

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页数：5

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