Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
Phys Rev Lett. 2013 Aug 9;111(6):065003. doi: 10.1103/PhysRevLett.111.065003. Epub 2013 Aug 7.
The first measurements of multiple, high-pressure shock waves in cryogenic deuterium-tritium (DT) ice layered capsule implosions on the National Ignition Facility have been performed. The strength and relative timing of these shocks must be adjusted to very high precision in order to keep the DT fuel entropy low and compressibility high. All previous measurements of shock timing in inertial confinement fusion implosions [T. R. Boehly et al., Phys. Rev. Lett. 106, 195005 (2011), H. F. Robey et al., Phys. Rev. Lett. 108, 215004 (2012)] have been performed in surrogate targets, where the solid DT ice shell and central DT gas regions were replaced with a continuous liquid deuterium (D2) fill. This report presents the first experimental validation of the assumptions underlying this surrogate technique.
已在国家点火装置上对低温氘氚（DT）冰层胶囊内爆中多次高压激波的首次测量进行了研究。为了保持 DT 燃料的低熵和高可压缩性，这些激波的强度和相对定时必须进行非常精确的调整。惯性约束聚变内爆中所有先前的激波定时测量[T. R. Boehly 等人，物理评论快报 106,195005（2011），H. F. Robey 等人，物理评论快报 108,215004（2012）]都是在替代靶中进行的，其中固体 DT 冰壳和中心 DT 气体区域被连续的液态氘（D2）填充所取代。本报告首次验证了这种替代技术的基本假设的实验验证。
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