边缘扫描反射计用于SPARC托卡马克上的密度配置测量
Y Lin1, V Nikolaeva2, D Hachmeister1
1Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
The Review of scientific instruments
|August 21, 2024
概括
边缘扫描反射计 (ESRL) 将测量SPARC托卡马克中的等离子体密度配置文件,以实时控制等离子体. 这种先进的系统使用多个频段的频率调制连续波来实现高密度测量.
科学领域:
- 血物理学的等离子体物理学
- 核聚变能源的研究.
- 微波诊断仪器 微波诊断仪器
背景情况:
- 精确的电子密度测量对于理解和控制聚变装置中的等离子体行为至关重要.
- 托卡马克的剥离层和H模式脚台区域对于限制和性能至关重要,需要详细的密度分析.
研究的目的:
- 开发和实施一个边缘扫描反射计 (ESRL) 系统用于SPARCtokamak.
- 测量从远处的剥离层到H模式脚顶部的电子密度配置文件.
- 提供实时密度数据,这对于活性血控制至关重要.
主要方法:
- 使用频率调制连续波 (FMCW) 技术,在18至90 GHz之间运行.
- 采用O模式和左截止X模式反射计,以覆盖大约4×10^18到4×10^20m^-3在12T的密度范围.
- 利用频率乘法和放大来产生K,Ka,U和E频段的信号,使用准光学技术进行组合.
- 包含超大波导和双静态布局,以最大限度地减少信号损失和扭曲.
主要成果:
- 该ESRL系统旨在在关键等离子体区域提供全面的电子密度测量.
- 使用COMSOL多物理射频模型的模拟有助于优化天线位置.
- 工程分析支持关键系统组件的初步设计.
结论:
- 在SPARC中,ESRL系统是详细电子密度分析的可行诊断工具.
- 多频段FMCW方法可以在H模式等离子体相关的广泛密度范围内进行测量.
- 来自ESRL的实时密度数据将大大提高核聚变研究的等离子体控制能力.
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