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首页> 外文期刊>Nuclear fusion >Electric fields and currents in front of a biased electrode (flush mounted probe) and the I--V characteristics of the electrode for various mechanisms of transverse conductivity
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Electric fields and currents in front of a biased electrode (flush mounted probe) and the I--V characteristics of the electrode for various mechanisms of transverse conductivity

机译：偏置电极（齐平安装的探头）前面的电场和电流以及各种横向导电率机制的电极的I-V特性

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摘要

The current-voltage characteristics of a biased electrode (flush mounted probe) and the potential and current distributions are analysed for three basic mechanisms of conductivity across the magnetic field (viscosity, inertia, ion--neutral collisions) in a fully ionized plasma for probe sizes larger than the ion gyro-radius. The analysis was performed both analytically (for small probe potentials) and numerically. It is shown that the slope of the transitional part of the I-V characteristics is approximately the same for all types of conductivity, provided the probe current is normalized to the ion sonic flow to the return current collecting area, while the probe voltage is measured in electron temperature units. The characteristic scale of the plasma perturbed region along the magnetic field is of the order of λ_mfp (m_i/m_e)~(1/2) for all three mechanisms considered. The transverse scale is essentially determined by the type of transverse conductivity.
机译：在完全电离的等离子体探头中，分析了偏置电极（齐平安装的探头）的电流-电压特性以及电位和电流分布，以分析磁场中整个电导率的三种基本机理（粘度，惯性，离子-中性碰撞）尺寸大于离子陀螺半径。分析是通过分析（对于小探针电位）和数值进行的。结果表明，对于所有类型的电导率，IV特性的过渡部分的斜率都近似相同，只要将探针电流归一化为流回返回电流收集区的离子声波，而探针电压则以电子方式测量温度单位。对于所考虑的所有三种机理，沿磁场的等离子体扰动区域的特征尺度为λ_mfp（m_i / m_e）〜（1/2）。横向尺度基本上由横向电导率的类型确定。

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