| (1/2+1/2+1)腔型热阴极微波电子枪 |
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| 引用本文： | 朱玲,陈怀璧,童德春,林郁正.(1/2+1/2+1)腔型热阴极微波电子枪[J].强激光与粒子束,2004,16(8):1033-1036. |
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| 作者姓名： | 朱玲 陈怀璧 童德春 林郁正 |
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| 作者单位： | 清华大学 工程物理系 加速器实验室， 北京 100084 |
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| 基金项目： | 国家自然科学基金资助课题(10135040) |
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| 摘 要： | 介绍了一种新型的轴耦合热阴极微波电子枪的设计，该枪采用了缩短首腔以及在首腔与主加速腔间插入耦合半腔的设计思想，在不破坏粒子束性能的基础上尽量减小反轰功率，给出了用Superfish 及Pamela软件进行物理设计以及粒子动力学计算的结果，在脉冲宽度为6μs, 重复频率为25Hz时，阴极上平均反轰功率为3.6W,达到设计要求。
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| 关 键 词： | 微波电子枪 热阴极 电子反轰 发射度 腔长 空间电荷效应 |
| 文章编号： | 1001-4322(2004)08-1033-04 |
| 收稿时间： | 2004/3/4 |
| 修稿时间： | 2004年3月4日 |
(1/2+1/2+1) cell structure type RF gun |
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| ZHU Ling,CHEN Huai-bi,TONG De-chun,LIN Yu-zheng.(1/2+1/2+1) cell structure type RF gun[J].High Power Laser and Particle Beams,2004,16(8):1033-1036. |
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| Authors: | ZHU Ling CHEN Huai-bi TONG De-chun LIN Yu-zheng |
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| Institution: | Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | In order to suppress the back bombardment of electrons in RF thermionic guns, a new kind of on axis coupled structure type RF gun was developed. It is composed of two half cells and a full cell. The first half cell is shortened and a half cell is inserted between the first half cell and the main accelerating cell to defocus the particles moving backwards with highest energy, thus the cathode back bombardment power is strongly reduced. For the field stability the π/2 mode is chosen. The electromagnetic field analytical codes SUPERFISH and PAMELA are mainly used to do the calculation and simulation. The average back bombardment power is about 3.6W, assuming the pulse width of 6μs and a repetition rate of 25Hz. |
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| Keywords: | Microwave gun (RF gun) Thermionic cathode Electron back bombardment Emittance Cell length Space charge effect |
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