一种非轴对称磁绝缘电子鞘层边界的计算方法

发布时间：2018-12-12 12:47

【摘要】：长距离磁绝缘传输线内电极偏心、感应腔注入电流非均匀分布引起电子鞘层边界偏心等非对称磁绝缘特性.电子鞘层边界是研究非轴对称磁绝缘特性的重要参数.本文提出一种计算非轴对称磁绝缘电子鞘层边界的方法.通过引入角向非均匀分布的模数,将经典一维轴对称Creedon稳态磁绝缘理论推广应用于圆柱坐标系下二维(r,θ)平面.建立了感应电压叠加器次级非轴对称磁绝缘的二维Creedon物理模型,给出了非轴对称磁绝缘电子鞘层边界的数值计算方法和计算误差.当阴极角向磁场(阴极电流)角向分布满足余弦函数时,电子鞘层边界接近高斯分布.阴极电流角向不均匀程度越大,电子鞘层边界偏心程度越严重,计算误差越大.
[Abstract]:Asymmetric magnetic insulation characteristics such as eccentricity of electrode in long distance magnetic insulation transmission line and non-uniform distribution of injection current in induction cavity lead to eccentricity of the boundary of electron sheath layer. The boundary of electron sheath is an important parameter to study the characteristics of non-axisymmetric magnetic insulation. In this paper, a method for calculating the boundary of electron sheath of non-axisymmetric magnetic insulation is presented. By introducing the modulus of angular nonuniform distribution, the classical one-dimensional axisymmetric Creedon steady-state magnetic insulation theory is extended to two-dimensional (r, 胃) plane in cylindrical coordinate system. A two-dimensional Creedon physical model of secondary non-axisymmetric magnetic insulation of inductive voltage superposition is established. The numerical calculation method and calculation error of the electron sheath boundary of non-axisymmetric magnetic insulation are given. When the angular distribution of the cathode angular magnetic field (cathode current) satisfies the cosine function, the boundary of the electron sheath layer is close to Gao Si's distribution. The greater the angular inhomogeneity of cathode current is, the more serious the eccentricity of electron sheath boundary is, and the greater the calculation error is.
【作者单位】：西安交通大学电力设备电气绝缘国家重点实验室;西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室;
【基金】：国家自然科学基金(批准号:11505138,51577156)资助的课题~~
【分类号】：TN811

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