| L波段强流单束团注入器的束流动力学计算 |
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| 引用本文： | 翁珍珊,吴兵.L波段强流单束团注入器的束流动力学计算[J].强激光与粒子束,1990,2(1):46-51. |
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| 作者姓名： | 翁珍珊 吴兵 |
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| 作者单位： | 中国原子能科学研究院
(翁珍珊)，中国原子能科学研究院(吴兵) |
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| 摘 要： | 自由电子激光器要求高亮度、低能散度的电子束注入波荡器(Undulator)。本文叙述提供高亮度电子束的高频电子直线加速器中的注入器部分的设计计算。注入器由L波段(1300MHz)的十二分频和三分频两个谐振腔预聚束器和一个基波频率的变相速聚束器组成。粒子运动方程中考虑了空间电荷效应和束流负载效应。电子枪的注入参数:脉冲宽度T=4ns;电流I=5A;电子的初始动能E_0=100keV;电子束分布为高斯型。参数优化设计结果:单束团宽度小于25ps,峰值电流达400A以上,电子的平均归一化能量>4,束团内的能量差小于200keV。
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| 关 键 词： | 自由电子激光器 谐振腔预聚束器 变相速聚束器 空间电荷效应 束流负载效应 束流动力学 计算 L波段 强流单束团注入器 |
ELECTRON DYNAMICS CALCULATION OF A L-BAND HIGH CURRENT SINGLE BUNCH INJECTOR |
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| Weng Zhenshan,Wu Bing Institute of Atomic Energy.ELECTRON DYNAMICS CALCULATION OF A L-BAND HIGH CURRENT SINGLE BUNCH INJECTOR[J].High Power Laser and Particle Beams,1990,2(1):46-51. |
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| Authors: | Weng Zhenshan Wu Bing Institute of Atomic Energy |
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| Abstract: | A high brightness electron beam is required for free electron lasers. The design of an injector for a r.f. electron linear accelerator to provide a high brightness electron beam is presented. The injector consists of two standing wave cavity prebunchers and a fundamental frequency traveling wave tapered phase velocity buncher. The space charge effect and the beam loading effect are considered in the equation of beam dynamics. The beam pulse from the electron gun is of a Gaussian shape with the following parametes: the pulse width of electron beam T=4ns, the initial electron energy E0 = 100keV, the peak current I = 5A. The calculation results with optimized parameters of the injector are: The bunch width and the energy spread in the bunch is less than 25ps and 200keV, respectively, the peak current is >400A, and the average normalized electron energy r is more than 4. |
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| Keywords: | disk model resonant cavity prebuncher space charge effect beam loading ef fect |
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