Carbon shell areal density measurements from many types of inertial confinement fusion implosions at the National Ignition Facility (NIF) demonstrate that the final state of the outside portion of the shell is set primarily by capsule coast time, the coasting period between main laser shut off and peak fusion output. However, the fuel areal density does not correlate with the increasing carbon compression. While two-dimensional (2D) radiation-hydrodynamic simulations successfully capture the carbon compression, energy must be added to the simulated fuel-ice layer to reproduce fuel areal density measurements. The data presented demonstrates that the degradation mechanisms that reduce the compressibility of the fuel do not reduce the compressibility of the ablator.

中文翻译：

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惯性约束融合推进器可压缩性的诊断特征

国家点火装置（NIF）通过多种类型的惯性约束聚变内爆进行的碳壳面密度测量表明，壳外部的最终状态主要由胶囊惯性运动时间，主激光器关闭和峰值融合输出。但是，燃料的面密度与碳压缩的增加无关。虽然二维（2D）辐射流体动力学模拟成功捕获了碳压缩，但必须将能量添加到模拟的燃料冰层中，以重现燃料的面密度测量值。所提供的数据表明，降低燃料可压缩性的降解机制不会降低消融器的可压缩性。