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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Application of Green's differential equation to the analysis of ion-matrix sheaths around wedge-shaped cathodes
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Application of Green's differential equation to the analysis of ion-matrix sheaths around wedge-shaped cathodes

机译:格林微分方程在楔形阴极周围离子矩阵鞘层分析中的应用

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摘要

A relation between the gradient of the electric field and mean curvature of equipotential surfaces (Green's differential equation) is applied to a two-dimensional free-boundary problem arising in the study of ion sheaths around wedge-shaped cathodes. With the assumption that the equipotential lines are hyperbolae, this relation leads to a nonlinear ordinary differential equation for the potential along the bisector line of the wedge. An approximate solution is found, which yields, in particular, the sheath width along this line as a function of the wedge angle. The resulting values are in good agreement with published results obtained by numerically solving Poisson's equation.
机译:电场梯度与等势面平均曲率之间的关系(格林氏微分方程)适用于研究楔形阴极周围离子鞘的二维自由边界问题。假设等势线是双曲线,则该关系导致沿着楔的等分线的势的非线性常微分方程。找到一个近似的解决方案,该解决方案特别产生沿着该线的护套宽度,该宽度是楔角的函数。结果值与通过数值求解泊松方程获得的公开结果非常一致。

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