| 带开口磁环的周期永磁聚焦系统的轴向磁场 |
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| 引用本文： | 彭龙,李元勋.带开口磁环的周期永磁聚焦系统的轴向磁场[J].强激光与粒子束,2011,23(9). |
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| 作者姓名： | 彭龙 李元勋 |
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| 作者单位： | 1. 成都信息工程学院 光电技术学院， 成都 610225; 2. 电子科技大学 电子薄膜与集成器件国家重点实验室， 成都 610054 |
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| 基金项目： | 国家自然科学基金项目(61001025); 成都信息工程学院科研基金项目(KYTZ201112) |
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| 摘 要： | 基于磁环的元电流模型，分析了永磁磁环的轴向磁场分布规律。理论计算和测试结果表明:轴向磁化磁环中心轴上的磁感应强度不存在径向分量,只有轴向分量;但磁环开口后，轴向磁场降低，而径向磁场增加，其中心轴上的合成磁感应强度体现出非轴对称性，不利于其在周期永磁（PPM）聚焦系统中的应用。根据磁场的轴向分量和径向分量的分布特点，设计和优化了带开口磁环的PPM系统，实现了轴向磁场的周期化。
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| 关 键 词： | 周期永磁聚焦系统 开口磁环 磁场分布 行波管 |
| 收稿时间： | 1900-01-01; |
Magnetic field along central axis for periodic permanent magnetic focusing system with open magnetic rings |
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| Peng Long,Li Yuanxun.Magnetic field along central axis for periodic permanent magnetic focusing system with open magnetic rings[J].High Power Laser and Particle Beams,2011,23(9). |
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| Authors: | Peng Long Li Yuanxun |
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| Institution: | （1. College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China; 2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China） |
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| Abstract: | Based on the current element model for magnetic ring,the magnetic field distribution along central axis was analyzed for permanent magnetic ring.Theoretical calculation and measured results show that the whole magnetic ring only exhibits an axial magnetic field without radial component.For the open magnetic ring with a gap,the axial magnetic field decreases and the radial magnetic field increases,producing a non-axis-symmetrical magnetic field along central axis.Therefore,the application of the open magneti... |
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| Keywords: | periodic permanent magnet focusing system open magnetic ring magnetic field distribution traveling wave tube |
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