作者: T. Döppner , D. A. Callahan , O. A. Hurricane , D. E. Hinkel , T. Ma
DOI: 10.1103/PHYSREVLETT.115.055001
关键词: Hohlraum 、 Fusion power 、 Materials science 、 Uranium 、 National Ignition Facility 、 Implosion 、 Nuclear physics 、 Depleted uranium 、 Ignition system 、 Nuclear engineering 、 Nova (laser)
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 National Ignition Facility. Recently, high-foot have demonstrated improved resistance to ablation-front Rayleigh-Taylor instability induced mixing of ablator material into DT hot spot [Hurricane et al., Nature (London) 506, 343 (2014)]. Uranium provide higher albedo and thus an increased drive equivalent additional 25 TW power peak compared standard gold leading implosion velocity. Additionally, we observe hot-spot shape closer round which indicates enhanced from waist. In contrast findings Campaign, now all our highest performing experiments been done achieved total yields approaching 10^{16} neutrons where more than 50% yield was due heating alpha particles stopping fuel.