行波管周期永磁聚焦系统模拟软件的研制
Design and implementation of periodic permanent magnetic focusing
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摘要: 通过对行波管周期永磁聚焦系统(PPM)的理论分析，开发了2维模拟软件UESTC_PPM。该软件主要用于模拟轴对称的永磁结构，在圆柱坐标系下，采用有限差分的方法迭代求解磁钢内外任意位置处的磁感应强度分布。模拟了单磁环结构以及单周期结构，将结果与Ansoft Maxwell 3D的模拟结果进行了对比，结果表明：轴上、轴向以及径向磁感应强度的分布图均很接近，但UESTC_PPM软件耗时较短,验证了UESTC_PPM的正确性，并具有一定的精确度。Abstract: The theory of periodic permanent magnetic focusing system was studied. 2-D software UESTC_PPM was implemented. It focuses on axisymmetric models and uses finite differential method(FDM) to compute the magnetic displacement. The one magnetic ring model and the one period model were simulated. The results were compared with the results of Ansoft Maxwell 3D. The magnetic induction intensity curve at axis of symmetry and the absolute value of magnetic induction intensity displacement at axial plane of symmetry that were computed with two kind of software are consistent with each other. UESTC_PPM is useful and accurate.
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