| 热阴极微波电子枪的改进设计 |
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| 引用本文： | 吴钢, 杨学平, 耿顺才, 等. 热阴极微波电子枪的改进设计[J]. 强激光与粒子束, 2003, 15(04). |
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| 作者姓名： | 吴钢 杨学平 耿顺才 王言山 |
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| 作者单位： | 1.中国科学院 高能物理研究所,北京 1 00080 |
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| 摘 要： | 北京自由电子激光目前所用热阴极微波电子枪输出的电子束，在经过加速管加速后，位于微波脉冲前沿的电子束团存在能量偏高的现象，使得这部分电子无法对FEL增益做贡献。根据实验数据，分析了造成该现象的原因，提出一种可行的改进措施，即通过降低微波谐振腔的品质因数缩短建场时间，来消除该现象，以便提高整个装置的输出性能。
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| 关 键 词： | 微波电子枪 品质因数 微波谐振腔 电子束能散度 微波脉冲 自由电子激光 激光增益 |
Upgrade design of a thermionic cathode RF gun |
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| wu gang, yang xue-ping, geng shun-cai, et al. Upgrade design of a thermionic cathode RF gun[J]. High Power Laser and Particle Beams, 2003, 15. |
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| Authors: | wu gang yang xue-ping geng shun-cai wang yan-shan |
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| Affiliation: | 1. Institute of High Energy Physics,the Chinese Academy of Sciences,P.O.Box 2732,Beijing 100080,China |
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| Abstract: | There is an ununiformity with the electron beam energy spread at Beijing Free Electron Laser Facilitis. It is observed that the electron energy in front of the current pulse rose much higher than the average,that this portion of electron bunchs lost in the bending segment and could not devote its energy to laser gain.This disfigurement is considered to be caused by the difference of building time of microwave field inside the RF gun and the accelerator.One cavity with low quality factor to shorten this difference was introduced in this paper,and an upgrade design of new thermionic cathode made of this kind of cavity is expected to improve laser gain. |
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| Keywords: | rf gun quality factor microwave resonant cavity electron beam energy spread microwave pulse free electron laser laser gain |
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