论文标题
面积密度不对称对ICF内爆的散射中子光谱的影响
The Effect of Areal Density Asymmetries on Scattered Neutron Spectra in ICF Implosions
论文作者
论文摘要
散射的中子光谱是一种诊断技术，通常用于测量ICF实验中的面积密度。有害的面部密度不对称修改了散射的中子光谱的形状。在这项工作中，开发了一种新的分析，可用于适合形状变化。这允许散射的中子光谱直接推断出面部密度不对称的幅度和模式，对影响其他面积密度的其他诊断的混杂因素的敏感性很小。该模型是通过与各向同性和各向异性初级融合中子源一起进行的中子转运计算产生的光谱测试的。需要多种视线来推断整个球体上的面积密度分布 - 我们研究了与该推断相关的误差传播和最佳检测器排列。
Scattered neutron spectroscopy is a diagnostic technique commonly used to measure areal density in ICF experiments. Deleterious areal density asymmetries modify the shape of the scattered neutron spectrum. In this work a novel analysis is developed which can be used to fit the shape change. This allows scattered neutron spectroscopy to directly infer the amplitude and mode of the areal density asymmetries, with little sensitivity to confounding factors which affect other diagnostics for areal density. The model is tested on spectra produced by a neutron transport calculation with both isotropic and anisotropic primary fusion neutron sources. Multiple lines of sight are required to infer the areal density distribution over the whole sphere -- we investigate the error propagation and optimal detector arrangement associated with this inference.
