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首页> 外文期刊>Plasma physics and controlled fusion >Turbulence and transport measurements with cold and emissive probes in ISTTOK
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Turbulence and transport measurements with cold and emissive probes in ISTTOK

机译：使用ISTTOK中的冷和发射探头进行湍流和运输测量

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摘要

A probe array consisting of three emissive probes and one cold cylindrical probe was developed for edge plasma measurements in ISTTOK. Emissive probes are particularly suitable for turbulence studies as they are able to deliver a more accurate measure of the plasma potential by reducing the effect of temperature fluctuations. The probe array has the advantage of recording the density, the electric field and their fluctuations simultaneously. Radial plasma profiles were recorded with and without negative edge biasing by an emissive electrode. The statistical properties of the poloidal electric field and of the turbulent particle flux, measured with cold and emissive probes, were compared. Both the root mean square of the poloidal electric field and the fluctuation-induced particle flux were found to be significantly larger when measured with the emissive probes, indicating that temperature fluctuations are important for the measurement of the particle flux. The probability distribution of the particle flux was also found to be more peaked and asymmetric when measured with the emissive probes.
机译：开发了一个由三个发射探针和一个冷圆柱探针组成的探针阵列，用于ISTTOK中的边缘等离子体测量。发射探针特别适合用于湍流研究，因为它们能够通过减少温度波动的影响来提供更精确的等离子电位测量。探针阵列的优点是可以同时记录密度，电场及其波动。记录径向等离子体轮廓，在有和没有由发射电极引起的负边缘偏置的情况下。比较了用冷探针和发射探针测得的极向电场和湍流通量的统计特性。使用发射探针进行测量时，发现电场电场的均方根值和由波动引起的粒子通量均显着较大，这表明温度波动对于粒子通量的测量很重要。当使用发射探针测量时，还发现粒子通量的概率分布更加尖峰且不对称。

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