标题： 一种先进的三轴椭圆形空腔用于间接驱动惯性约束核聚变 显示英文标题

标题： An advanced three-axis elliptical hohlraum for indirectly driven inertial confinement fusion

摘要： 辐射对称性和激光等离子体不稳定性（LPIs）在传统圆柱形空腔配置中是实现间接驱动惯性约束聚变点火的两个严峻挑战。最近，提出了近真空圆柱形空腔（NVCH）、八面体球形空腔（SH）和新型三轴圆柱形空腔（TACH）以缓解这些问题。尽管耦合效率可能仍然是一个关键风险。在本文中，提出了一种先进的三轴椭圆空腔（TAEH），以在这些空腔性能之间取得平衡。初步模拟表明，TAEH（案例到胶囊比，CCR=2.8）在高脚驱动的完整激光脉冲期间可以提供优异的辐射对称性，与SH（CCR=5.1）和TACH（CCR=2.2）内部的相当。影响LPIs的等离子体填充时间介于SH和TACH之间，并约为NIC的点火空腔Rev5-CH的1.5倍，接近NVCH（CCR=3.4）内部的数值。特别是，耦合效率分别比NVCH、SH和TACH内部的高出约22%、29%和17%。可以预见，所提出的空腔配置值得考虑作为间接驱动点火的一种替代途径，补充传统的圆柱形空腔和最近提出的新型空腔。 显示英文摘要

摘要： The radiation symmetry and laser-plasma instabilities (LPIs) inside the conventional cylindrical hohlraum configuration are the two daunting challenges on the approach to ignition in indirectly driven inertial confinement fusion. Recently, near-vacuum cylindrical hohlraum (NVCH), octahedral spherical hohlraum (SH) and novel three-axis cylindrical hohlraum (TACH) were proposed to mitigate these issues. While the coupling efficiency might still be a critical risk. In this paper, an advanced three-axis elliptical hohlraum (TAEH) is proposed to make a compromise among these hohlraum performance. Preliminary simulations indicate that the TAEH (with a case-to-capsule ratio, CCR=2.8) could provide excellent radiation symmetry during the thorough laser pulse of the high-foot drive, comparable to the ones inside the SH (CCR=5.1) and TACH (CCR=2.2). The filling time of plasma affecting the LPIs is between those of SH and TACH, and about 1.5 times of that in the ignition hohlraum Rev5-CH of NIC and close to the one inside the NVCH (CCR=3.4). In particular, the coupling efficiency is about 22%, 29% and 17% higher than the one inside the NVCH, SH and TACH, respectively. It would be envisioned that the proposed hohlraum configuration merits consideration as an alternative route to indirect-drive ignition, complementary to the traditional cylindrical hohlraum and the proposed recently novel hohlraums.