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辐射再吸收在热束诊断中的作用

M Ugoletti¹, M Agostini^1,2, M La Matina^2,3

¹ISTP-CNR, Institute for Plasma Science and Technology, Corso Stati Uniti 4, 35127 Padova, Italy.

The Review of scientific instruments

|August 14, 2024

概括

一种新的热束 (THB) 诊断仪使用四条HeI线测量血特性. 这种增强的THB可用于辐射再吸收,提高了聚变装置的剥离层 (SOL) 的精度.

科学领域:

血物理学的等离子体物理学
核聚变能源的研究.
原子和分子物理学原子和分子物理学

背景情况:

热束 (THB) 诊断测量了等离子边缘的电子温度和密度.
标准THB使用三条HeI线 (667.8,706.5,728.1nm),但辐射再吸收效应经常被忽视.

研究的目的:

引入和测试一种新型THB诊断,其中包含第四条HEI线 (501.6nm) 来测量辐射再吸收.
通过实验量化辐射再吸收对电子温度和密度测量的影响.

主要方法:

在TCV托卡马克上设计并实施了一种新的THB系统.
诊断使用了四条HEI发射线 (501.6,667.8,706.5,728.1 nm).
碰撞辐射模型 (CRMs) 用于分析线路强度和估计等离子体特性,并未考虑再吸收.

主要成果:

该研究介绍了TCV托卡马克等离子边缘的电子温度和密度配置文件.
辐射再吸收被实验测量了第一次在一个tokamak使用501.6纳米线.
包括CRM中的再吸收在内,提高了测量准确度,特别是在远处的剥离层 (SOL).

结论:

新设计的THB,结合501.6nm线路,有效地测量和纠正辐射再吸收.
在SOL中精确测量血形状需要考虑再吸收效应.
这种增强的THB诊断为核聚变能源研究提供了更可靠的数据.

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