Ma T, Hurricane O A, Callahan D A, Barrios M A, Casey D T, Dewald E L, Dittrich T R, Döppner T, Haan S W, Hinkel D E, Berzak Hopkins L F, Le Pape S, MacPhee A G, Pak A, Park H-S, Patel P K, Remington B A, Robey H F, Salmonson J D, Springer P T, Tommasini R, Benedetti L R, Bionta R, Bond E, Bradley D K, Caggiano J, Celliers P, Cerjan C J, Church J A, Dixit S, Dylla-Spears R, Edgell D, Edwards M J, Field J, Fittinghoff D N, Frenje J A, Gatu Johnson M, Grim G, Guler N, Hatarik R, Herrmann H W, Hsing W W, Izumi N, Jones O S, Khan S F, Kilkenny J D, Knauer J, Kohut T, Kozioziemski B, Kritcher A, Kyrala G, Landen O L, MacGowan B J, Mackinnon A J, Meezan N B, Merrill F E, Moody J D, Nagel S R, Nikroo A, Parham T, Ralph J E, Rosen M D, Rygg J R, Sater J, Sayre D, Schneider M B, Shaughnessy D, Spears B K, Town R P J, Volegov P L, Wan A, Widmann K, Wilde C H, Yeamans C
Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
Phys Rev Lett. 2015 Apr 10;114(14):145004. doi: 10.1103/PhysRevLett.114.145004. Epub 2015 Apr 6.
Experiments have recently been conducted at the National Ignition Facility utilizing inertial confinement fusion capsule ablators that are 175 and 165 μm in thickness, 10% and 15% thinner, respectively, than the nominal thickness capsule used throughout the high foot and most of the National Ignition Campaign. These three-shock, high-adiabat, high-foot implosions have demonstrated good performance, with higher velocity and better symmetry control at lower laser powers and energies than their nominal thickness ablator counterparts. Little to no hydrodynamic mix into the DT hot spot has been observed despite the higher velocities and reduced depth for possible instability feedthrough. Early results have shown good repeatability, with up to 1/2 the neutron yield coming from α-particle self-heating.
最近在国家点火装置上进行了实验，使用的惯性约束聚变胶囊烧蚀层厚度分别为175微米和165微米，比在“高脚”实验及国家点火计划大部分实验中使用的标称厚度胶囊薄10%和15%。这些三波冲击、高绝热、高脚内爆实验展现出良好性能，与标称厚度烧蚀层的实验相比，在更低激光功率和能量下具有更高速度和更好的对称性控制。尽管速度更高且可能产生不稳定性馈通的深度减小，但几乎未观察到流体动力学混合进入氘氚热点。早期结果显示出良好的可重复性，高达一半的中子产额来自α粒子自热。
