Over the last several years, rapid progress has been made evaluating the double-z-pinch indirect-drive, inertial confinement fusion (ICF) high-yield target concept (Hammer et al 1999 Phys. Plasmas6 2129). We have demonstrated efficient coupling of radiation from two wire-array-driven primary hohlraums to a secondary hohlraum that is large enough to drive a high yield ICF capsule. The secondary hohlraum is irradiated from two sides by z-pinches to produce low odd-mode radiation asymmetry. This double-pinch source is driven from a single electrical power feed (Cuneo et al 2002 Phys. Rev. Lett.88 215004) on the 20 MA Z accelerator. The double z-pinch has imploded ICF capsules with even-mode radiation symmetry of 3.1 ± 1.4% and to high capsule radial convergence ratios of 14–21 (Bennett et al 2002 Phys. Rev. Lett.89 245002; Bennett et al 2003 Phys. Plasmas10 3717; Vesey et al 2003 Phys. Plasmas10 1854). Advances in wire-array physics at 20 MA are improving our understanding of z-pinch power scaling with increasing drive current. Techniques for shaping the z-pinch radiation pulse necessary for low adiabat capsule compression have also been demonstrated.
过去几年中，双Z箍缩间接驱动惯性约束聚变（ICF）高产额靶标概念取得了快速进展（Hammer等 1999 Phys. Plasmas 6 2129）。我们已经证明了从两个线阵列驱动的初级黑腔到足以驱动高产额ICF靶丸的次级黑腔的高效辐射耦合。次级黑腔由两侧的Z箍缩辐照，以产生低奇模不对称性。这种双箍缩源由单一电功率馈入驱动（Cuneo等 2002 Phys. Rev. Lett. 88 215004），位于20 MA的Z加速器上。双Z箍缩已使ICF靶丸内爆，实现了3.1±1.4%的偶模辐射对称性，以及14–21的高靶丸径向收敛比（Bennett等 2002 Phys. Rev. Lett. 89 245002；Bennett等 2003 Phys. Plasmas 10 3717；Vesey等 2003 Phys. Plasmas 10 1853）。在20 MA下，线阵列物理的进展正在提高我们对Z箍缩功率随驱动电流增加的缩放规律的理解。用于低绝热压缩靶丸所需的Z箍缩辐射脉冲整形技术也已得到验证。