Hybrid target design for imprint mitigation in direct-drive inertial confinement fusion

被引：13

作者：

Ceurvorst, L. ^{[1
]}

Betti, R. ^{[2
]}

Casner, A. ^{[1
]}

Gopalaswamy, V ^{[2
]}

Bose, A. ^{[2
]}

Hu, S. X. ^{[2
]}

Campbell, E. M. ^{[2
]}

Regan, S. P. ^{[2
]}

McCoy, C. A. ^{[3
]}

Karasik, M. ^{[4
]}

Peebles, J. ^{[2
]}

Tabak, M. ^{[5
]}

Theobald, W. ^{[2
]}

机构：

[1] Univ Bordeaux, CELIA, CNRS, CEA,UMR 5107, F-33405 Talence, France

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

[3] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

[4] Naval Res Lab, Plasma Phys Div, Washington, DC 20375 USA

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

来源：

PHYSICAL REVIEW E | 2020年 / 101卷 / 06期

关键词：

RAYLEIGH-TAYLOR INSTABILITY; PHYSICS BASIS; LASER; REDUCTION; IGNITION; PULSE;

D O I：

10.1103/PhysRevE.101.063207

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A target design for mitigating the Rayleigh-Taylor instability is proposed for use in high energy density and direct-drive inertial confinement fusion experiments. In this scheme, a thin gold membrane is offset from the main target by several-hundred microns. A strong picket on the drive beams is incident upon this membrane to produce x rays which generate the initial shock through the target. The main drive follows shortly thereafter, passing through the ablated shell and directly driving the main target. The efficacy of this scheme is demonstrated through experiments performed at the OMEGA EP facility, showing a reduction of the Rayleigh-Taylor instability growth which scales exponentially with frequency, suppressing development by at least a factor of 5 for all wavelengths below 100 mu m. This results in a delay in the time of target perforation by similar to 40%.

引用

页数：6

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