Localized measurement of turbulent fluctuations in tokamaks with coherent scattering of electromagnetic waves
Localized measurement of turbulent fluctuations in tokamaks with coherent scattering of electromagnetic waves
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DOI：
10.1063/1.1541018
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发表时间：
2002-08
影响因子：
2.2
通讯作者：
E. Mazzucato
中科院分区：
文献类型：
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作者：
E. Mazzucato
托卡马克装置中短尺度湍流脉动的局域化测量仍然是一个突出的问题。本文对电磁波相干散射探测密度涨落的方法进行了重新讨论。结果表明，适当选择的频率，大小和发射的探测波可以将这种方法转化为一个很好的技术，用于高分辨率的测量等离子体理论表明，在托卡马克的异常传输的潜在原因的波动。最好的空间分辨率可以实现时，散射角的范围对应的波动的频谱调查是小的。这有利于使用高频探测波，如远红外激光。讨论了该技术在现有大型托卡马克装置上的应用。
Localized measurements of short-scale turbulent fluctuations in tokamaks are still an outstanding problem. In this paper, the method of coherent scattering of electromagnetic waves for the detection of density fluctuations is revisited. Results indicate that the proper choice of frequency, size and launching of the probing wave can transform this method into an excellent technique for high-resolution measurements of those fluctuations that plasma theory indicates as the potential cause of anomalous transport in tokamaks. The best spatial resolution can be achieved when the range of scattering angles corresponding to the spectrum of fluctuations under investigation is small. This favors the use of high frequency probing waves, such as those of far infrared lasers. The application to existing large tokamaks is discussed.