Plasma density control in real-time on the COMPASS tokamak
Plasma density control in real-time on the COMPASS tokamak
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DOI：
10.1016/j.fusengdes.2015.04.065
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发表时间：
2015-10
影响因子：
1.7
通讯作者：
F. Janky;M. Hron;J. Havlicek;M. Varavin;F. Žáček;J. Seidl;R. Pánek
中科院分区：
文献类型：
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作者：
F. Janky;M. Hron;J. Havlicek;M. Varavin;F. Žáček;J. Seidl;R. Pánek
罗盘上的电子密度用2毫米微波干涉仪测量。干涉仪信号作为反馈控制回路的输入，在MARTe实时框架下运行。使用两种不同的线程来计算（快速50 μs线程）和控制（慢速500 μs线程）电子密度。干涉仪沿着测量弦测量线平均密度。本文描述了一种在实时环路中控制线平均电子密度的方法，该方法利用了对真实等离子体形状、等离子体位置和高密度电子密度测量的非线性效应的校正。新开发的实时电子密度控制使COMPASS有机会更准确地控制电子密度，这对于诊断医生的参数扫描，物理实验以及实现h模式等离子体场景至关重要。
The electron density on COMPASS is measured using 2 mm microwave interferometer. Interferometer signal is used as an input for the feedback control loop, running under the MARTe real-time framework. Two different threads are used to calculate (fast 50 μs thread) and to control (slow 500 μs thread) the electron density. The interferometer measures a line averaged density along a measurement chord.This paper describes an approach to control the line-averaged electron density in a real-time loop, using a correction to the real plasma shape, the plasma position, and non-linear effects of the electron density measurement at high densities.Newly developed real-time electron density control give COMPASS the chance to control the electron density more accurately which is essential for parametric scans for diagnosticians, for physics experiments and also for achieving plasma scenarios with H-mode.