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在W7-X中进行重杂质运输研究的高n瑞德伯格过渡光谱 (受邀)

Colin Swee¹, Benedikt Geiger¹, Oliver Ford²

¹Department of Engineering Physics, University of Wisconsin Madison, Madison, Wisconsin 53706, USA.

The Review of scientific instruments

|September 26, 2024

概括

这项研究引入了一种使用高n Rydberg 转换的新光谱法,以精确测量等离子体中的杂质传输. 这种技术为杂质输送系数提供了明确的置信区间,改善了等离子体诊断.

科学领域:

等离子体物理学的物理学
原子和分子物理原子和分子物理
频谱学是一种光谱学.

背景情况:

杂质运输对于理解和控制高温等离子体至关重要.
测量杂质传输的传统方法在本地化和准确性方面存在局限性.
高n的Rydberg状态的杂质离子不易被冲击激发填充.

研究的目的:

开发和验证一种用于研究杂质运输的新型光谱方法.
以高精度和记录的置信区间来确定杂质输送系数.
为了证明高n瑞德伯格光谱在等离子体诊断中的实用性.

主要方法:

使用在高n Rydberg 过渡之后的线性辐射.
采用中性束沿线的电荷交换 (CX) 反应来填充瑞德伯格状态.
开发一种使用OPEN-ADAS数据库数据计算有效排放系数的技术.
将建模结果与新的高n Rydberg CX 测量和 Bolometer 数据进行比较.

主要成果:

在可见范围内观察到的高度电离杂质的局部辐射.
计算有效排放系数,复制数据库中的能源依赖性.
杂质传输系数首次用2σ的置信区间确定.
运输系数上的误差条通过结合博洛米特测量来减少.

结论:

高n 赖德伯格光谱为确定杂质传输系数提供了重要的约束.
新的光谱方法提高了等离子体杂质分析的准确性.
综合分析与博洛米特测量进一步细化了杂质密度和运输测量.

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