带屏蔽筒鞍形偏转线圈场参数的确定
THE DETERMINATION OF THE FIELD PARAMETERS OF SADDLE DEFLECTION YOKE WITH A FERROMAGNETIC SHIELD
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摘要: 本文讨论了用边界元法计算、分析带屏蔽简鞍形偏转线圈的场分布,分析了法伊(D.M.Fye,1979)模型应用的局限性。本文用马克劳林级数展开格林函数,给出了偏转线圈的场参数B0,B2,B4的解析表达式。文末用实例对计算结果与实测数据进行了比较。
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Abstract: The analysis and computation of the field distribution of the saddle deflection coil with a ferromagnetic shield by the boundary element method are described, and the limitations of the model proposed by D. M. Fye (1979) is pointed out. The Green s function is expanded by the Maclaurin series, and the analytical forms of the field parameters B0, B2 and B4 are given. The results obtained agree well with the experimentally measured values. -
W. Schwertfeger and E. Kasper, Optik,4(1974),160.[2]E. Munro, J. Vac. Sci. Techn., 12(1975), 1146.[3]西门纪业,陈文雄,物理学报,28(1979), 201.[4]D. M. Fye, J. Appl. Phys., 50(1979), 17.[5]R. F. Harrington, Field Computation by Moment Methods,MacMillon, New York, 1968.[6]E. F. Ritz, Advances in Electronics and Electron Physics,Vol. 49. Academic Press, 1979, p. 297.[7]丁守谦,物理学报,30(1981), 459. -
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