| 变参数Smith-Purcell自由电子激光器的效率 |
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| 引用本文： | 熊平凡,王友棠.变参数Smith-Purcell自由电子激光器的效率[J].强激光与粒子束,1996,8(1):11-18. |
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| 作者姓名： | 熊平凡 王友棠 |
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| 作者单位： | 1. 湖北孝感师范高等专科学校教务处 432100; 2. 上海交通大学物理系 200030 |
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| 摘 要： | 讨论了变参数Smith–Purcell自由电子激光器中电子的一维运动。得到了小信号情况下器件效率的解析式，给出了选取光栅参数的变化依据。在辐射输出波长为1 μm情况下进行了数值模拟计算。结果表明，当光栅参数的变化选取合适时，增加电子与场的相互作用长度，能提高器件的工作效率。
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| 关 键 词： | Smith–Purcell效率 自由电子激光 光栅 变参数 空间频率 |
| 收稿时间： | 1900-01-01; |
THE EFFICIENCY OF THE VARIABLE PARAMETER SMITH-PURCELL FEL |
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| Xiong Pingfan.THE EFFICIENCY OF THE VARIABLE PARAMETER SMITH-PURCELL FEL[J].High Power Laser and Particle Beams,1996,8(1):11-18. |
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| Authors: | Xiong Pingfan |
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| Abstract: | The electron 1–D movement for the variable parameter Smith – Purcell FEL is discussed. When the laser operates in state of the low – gain, the analytical expression of the efficiency is derived and a reference formula as how to choose the change rate of the gratting parameter is also given. The numerical simulation results for a radiation output of 1m m ?wavelength are presented. The interaction length between the electrons and the field can be stretched and the efficiency will be enhanced when the change rate is chosed properly. |
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| Keywords: | Smith-Purcell effect FEL grathng variable parameter space frequency |
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