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Updated: May 24, 2025

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实时可导向的频率阶段多普勒反射散射 (DBS) 系统用于DIII-D托卡马克上的局部直子波电场测量

S Chowdhury¹, N A Crocker¹, W A Peebles¹

¹Physics and Astronomy Department, University of California, Los Angeles, California 90095, USA.

The Review of scientific instruments

|March 4, 2025

概括

在DIII-D托卡马克的新多普勒反射系统同时测量等离子体流和直子波. 这使得波粒子相互作用的实时成像以及直子波动功率的空间分布成为可能.

科学领域:

等离子体物理学的物理学
核聚变能源研究研究
波-等离子体相互作用

背景情况:

了解等离子体流和波传播对于聚变能源至关重要.
螺旋波用于电流驱动的托卡马克,如DIII-D.
诊断高频密度波动是一项挑战.

研究的目的:

开发和实施一种新的频率阶段多普勒反散 (DBS) 系统.
为了同时探测背景流和高频密度波动.
在当前驱动实验中诊断直子波的空间结构.

主要方法:

集成了一个频率级别的DBS系统与实时可转向的电子旋转子加热发射器.
使用可编程频率合成器发射毫米波 (O或X模式).
实时扫描测量位置和波数.

主要成果:

观察到的宽带密度波动围绕着直子频率.
鉴定出这些波动是由直子波调节的等离子体流引起的反散.
证明背景流被直子波电场"标记",产生侧带.

结论:

新的DBS系统可以同时测量流和高频波动.
这允许实时监控本地直子波幅和空间功率分布.
测量可以验证聚变等离子体中直子电流驱动的预测模型.

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