Gomez M R, Slutz S A, Sefkow A B, Sinars D B, Hahn K D, Hansen S B, Harding E C, Knapp P F, Schmit P F, Jennings C A, Awe T J, Geissel M, Rovang D C, Chandler G A, Cooper G W, Cuneo M E, Harvey-Thompson A J, Herrmann M C, Hess M H, Johns O, Lamppa D C, Martin M R, McBride R D, Peterson K J, Porter J L, Robertson G K, Rochau G A, Ruiz C L, Savage M E, Smith I C, Stygar W A, Vesey R A
Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, USA.
Phys Rev Lett. 2014 Oct 10;113(15):155003. doi: 10.1103/PhysRevLett.113.155003. Epub 2014 Oct 6.
This Letter presents results from the first fully integrated experiments testing the magnetized liner inertial fusion concept [S. A. Slutz et al., Phys. Plasmas 17, 056303 (2010)], in which a cylinder of deuterium gas with a preimposed 10 Taxial magnetic field is heated by Z beamlet, a 2.5 kJ, 1 TW laser, and magnetically imploded by a 19 MA, 100 ns rise time current on the Z facility. Despite a predicted peak implosion velocity of only 70 km = s, the fuel reaches a stagnation temperature of approximately 3 keV, with T(e) ≈ T(i), and produces up to 2 x 10(12) thermonuclear deuterium-deuterium neutrons. X-ray emission indicates a hot fuel region with full width at half maximum ranging from 60 to 120 μm over a 6 mm height and lasting approximately 2 ns. Greater than 10(10) secondary deuterium-tritium neutrons were observed, indicating significant fuel magnetization given that the estimated radial areal density of the plasma is only 2 mg = cm(2).
本信函展示了首次全面整合实验的结果，这些实验对磁化内衬惯性聚变概念进行了测试 [S. A. 斯卢茨等人，《物理等离子体》17, 056303 (2010)]。在该实验中，一个预先施加了10 T轴向磁场的氘气圆柱体由Z小束激光（一台2.5 kJ、1 TW的激光器）加热，并在Z装置上由一个19 MA、100 ns上升时间的电流进行磁内爆。尽管预计的峰值内爆速度仅为70 km/s，但燃料达到了约3 keV的停滞温度，其中T(e) ≈ T(i)，并产生了多达2×10¹²个热核氘 - 氘中子。X射线发射表明存在一个热燃料区域，其半高全宽在6 mm高度范围内为60至120 μm，持续时间约为2 ns。观察到超过10¹⁰个次级氘 - 氚中子，鉴于估计的等离子体径向面密度仅为2 mg/cm²，这表明燃料具有显著的磁化。
