Deficiencies in compression and yield in x-ray-driven implosions

This paper analyzes x-ray–driven implosions that are designed to be less sensitive to 2-D and 3-D effects in hohlraum and capsule physics. Key performance metrics including the burn-averaged ion temperature, hot-spot areal density, and fusion yield are found to agree with simulations where the design adiabat (internal pressure) is multiplied by a factor of 1.4. These results motivate the development of a simple model for interpreting experimental data, which is then used to quantify how improvements in compression could help achieve ignition.

本文针对旨在降低黑腔（hohlraum）与靶丸（capsule）物理中二维、三维效应敏感度的X射线驱动内爆展开分析。研究表明，包含燃烧平均离子温度、热点面密度与聚变产额在内的关键性能指标，与将设计绝热因子（adiabat，即内部压强）放大1.4倍后的模拟结果高度吻合。上述研究成果推动了一款用于解读实验数据的简易模型的建立，该模型随后被用于量化压缩性能优化对实现聚变点火的助力效果。