| 射频远红外波导自由电子激光器的新特性 |
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| 引用本文： | 胡素兴,傅恩生,徐至展.射频远红外波导自由电子激光器的新特性[J].物理学报,1996,45(8):1319-1325. |
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| 作者姓名： | 胡素兴 傅恩生 徐至展 |
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| 作者单位： | 中国科学院上海光学精密机械研究所,上海201800;中国科学院上海光学精密机械研究所,上海201800;中国科学院上海光学精密机械研究所,上海201800 |
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| 摘 要： | 将射频调制的超短脉冲电子束理想化为一系列δ时间函数,提出了用波导本征模展开的方法计算波导自由电子激光器中超短脉冲电子束的相干同步辐射.结果发现当谐振频率等于直线加速器射频的整数倍时,辐射模式表现为”纯”的波导本征模另外分析了超短脉冲在矩形波导中相干发射的频率特性和滑移问题,最后推导了有一定脉宽的矩形脉冲对辐射波的增益解析式.
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| 关 键 词： | 自由电子激光器 远红外 波导 射频 |
| 收稿时间： | 1995-03-10 |
NEW PERFORMANCE OF RADIO FREQUENCY FAR INFRARED WAVEGUIDE FREE ELECTRON LASER |
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| HU SU-XING,FU EN-SHENG and XU ZHI-ZHAN.NEW PERFORMANCE OF RADIO FREQUENCY FAR INFRARED WAVEGUIDE FREE ELECTRON LASER[J].Acta Physica Sinica,1996,45(8):1319-1325. |
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| Authors: | HU SU-XING FU EN-SHENG and XU ZHI-ZHAN |
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| Abstract: | Idealizing the ultrashort pulse electron beam modulated by radio-frequency as a delta function on time scale, we calculate the coherent synchrotron radiation emitted by the electron micropulse in a rectangular waveguide with the method of eigenmode expansion. We find that when the frequency of radiation is the integral times of the radio frequency ωrf, the radiation field pattern will appear as "pure" eigenmodes of waveguide. In addition, we analyse the frequency performance of the coherent synchrotron radiation and the slippage effect. And finally, the gain of a rectangular electron pulse amplifying the radiation is deduced. |
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