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推断核聚变核燃烧宽度与低增益光倍增器脉冲响应功能

K D Meaney¹, J Jeet², J Carrera²

¹Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

The Review of scientific instruments

|December 2, 2024

概括

马反应诊断历史诊断历史

科学领域:

核聚变是一种核聚变.
等离子体物理学的物理学
诊断技术诊断技术

背景情况:

惯性封闭核聚变 (ICF) 爆破可以在短时间内达到高密度和高温度 (约. 100 ps) 的时间.
马反应史 (GRH) 诊断测量了聚变燃烧的演变,但受到光倍增管 (PMT) 时间分辨率的限制.

研究的目的:

调查减少增强设置对PMT冲动响应函数 (IRF) 的影响及其对推断的聚变燃烧宽度的影响.
在高产量ICF实验中提高聚变燃烧宽度测量的准确性.

主要方法:

利用基于多通道板的PMT用于GRH诊断中的光子信号放大.
开发并应用了一个分析程序,以从测量信号中解PMT IRF.
在显著降低增益设置 (比名义低三次数量级) 时校准的PMT.

主要成果:

观察到PMT IRF在降低收益设置时扩大约15%.
取决于增益的IRF校正可以改变推断的核燃烧宽度高达15%.

结论:

PMT性能对增益设置敏感,需要增益依赖校准以进行准确的ICF诊断.
对增强依赖的PMT IRF的计算对于精确确定融合燃烧演变至关重要,特别是在国家点火设施.

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