Fuel gain exceeding unity in an inertially confined fusion implosion

被引：819

作者：

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

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

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

Celliers, P. M. ^{[1
]}

Cerjan, C. ^{[1
]}

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

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

Doeppner, T. ^{[1
]}

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

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

Kline, J. L. ^{[2
]}

Le Pape, S. ^{[1
]}

Ma, T. ^{[1
]}

MacPhee, A. G. ^{[1
]}

Milovich, J. L. ^{[1
]}

Pak, A. ^{[1
]}

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

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

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

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

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

Tommasini, R. ^{[1
]}

机构：

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

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

来源：

NATURE | 2014年 / 506卷 / 7488期

关键词：

RAYLEIGH-TAYLOR INSTABILITY; NATIONAL IGNITION FACILITY;

D O I：

10.1038/nature13008

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Ignition is needed to make fusion energy a viable alternative energy source, but has yet to be achieved(1). A key step on the way to ignition is to have the energy generated through fusion reactions in an inertially confined fusion plasma exceed the amount of energy deposited into the deuterium-tritium fusion fuel and hotspot during the implosion process, resulting in a fuel gain greater than unity. Here we report the achievement of fusion fuel gains exceeding unity on the US National Ignition Facility using a 'high-foot' implosion method(2,3), which is a manipulation of the laser pulse shape in a way that reduces instability in the implosion. These experiments show an order-of-magnitude improvement in yield performance over past deuterium-tritium implosion experiments. We also see a significant contribution to the yield from alpha-particle self-heating and evidence for the 'bootstrapping' required to accelerate the deuterium-tritium fusion burn to eventually 'run away' and ignite.

引用

页码：343 / +

页数：7

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