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用JET中子摄像头估计等离子体中的中子产量

Linus Hägg¹, Federico Binda², Sean Conroy¹

¹Department of Physics and Astronomy, Uppsala University, SE-751 05 Uppsala, Sweden.

The Review of scientific instruments

|July 5, 2023

概括

一种新方法使用JET中子摄像头估计了- (DD) 中子产量,与裂变室达成10%的一致性. 这种技术可以扩展到三 (DT) 中子产率估计.

科学领域:

核聚变工程核聚变工程
血诊断器血诊断器血诊断器

背景情况:

联合欧洲火 (JET) 使用一个带有19个液体闪光灯视线的中子摄像头进行二维等离子中子排放分析.
精确的中子产量测量对于融合能源研究和反应堆控制至关重要.

研究的目的:

开发和验证一种第一原理物理方法,仅从JET中子相机测量结果来估计DD中子产量.
根据已建立的JET裂变室测量,评估该方法的准确性.

主要方法:

使用了中子排放配置文件的参数化模型和先进的数据减少技术.
纳入了中子运输,探测器响应的模拟,并考虑了中子散射和聚合器传输.
利用升级后的 JET 中子相机数据采集系统.

主要成果:

开发的方法提供了独立于其他中子测量的DD中子产量估计.
与JET裂变室相比,中子产量估计显示平均一致性在10%以内.
发现中子散射和聚合器传输对检测到的0.5 MeVee以上的中子速率贡献了约9%.

结论:

第一原则方法提供了使用JET中子摄像机数据对DD中子产量估计的可靠方法.
尽管使用简化的中子排放配置模型,但该方法的准确性是有希望的.
未来的工作可以通过先进的排放档案来提高准确性,并将方法扩展到DT中子产量估计.

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