| 超快电子衍射仪理论及实验研究 |
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| 引用本文： | 王兴超,田进寿,刘虎林,卢裕,曹自强.超快电子衍射仪理论及实验研究[J].强激光与粒子束,2013,25(7):1630-1634. |
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| 作者姓名： | 王兴超 田进寿 刘虎林 卢裕 曹自强 |
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| 作者单位： | 1.中国科学院 西安光学精密机械研究所 瞬态光学与光子技术国家重点实验室, 西安 71 01 1 9; |
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| 摘 要： | 研制一套同时具有时间分辨及空间分辨能力的超快电子衍射(UED)系统，理论时间分辨能力达到300 fs，空间分辨能力160 lp/mm，并对该系统进行了静态性能分析。实验表明，优化后系统电子束直径约为300 m，电子打靶角度约为0.09，同时对x和y偏转板的灵敏度、电子束斑尺寸及位置稳定性进行定量分析,利用该系统进行多晶铝膜电子衍射实验，分析衍射图样表明系统最小可以分辨单个晶格间距的0.36%。
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| 关 键 词： | 超快电子枪 结构设计 偏转灵敏度 电子衍射 空间分辨率 |
| 收稿时间： | 2012-10-29; |
Theoretical and experimental research on ultrafast electron diffraction system |
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| Wang Xingchao,Tian Jinshou,Liu Hulin,Lu Yu,Cao Ziqiang.Theoretical and experimental research on ultrafast electron diffraction system[J].High Power Laser and Particle Beams,2013,25(7):1630-1634. |
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| Authors: | Wang Xingchao Tian Jinshou Liu Hulin Lu Yu Cao Ziqiang |
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| Affiliation: | 1.State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China;2.Education and Research Department of Xi’an Military Academy,Xi’an 710108,China;3.University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | An ultrafast electron diffraction system with both ultrafast temporal resolution and ultrahigh spatial resolution was established. The temporal resolution of the system is 300 fs and spatial resolution 160 lp/mm in theory. Investigation and optimization on spatial resolution of the system was performed. The experimental results demonstrate that the system can provide an electron beam diameter less than 300 μm and an incidence angle less than 0.09°. The x-y deflection plates and stability of the electron beam were quantitatively analyzed. The diffraction pattern of Al was obtained by this system and it demonstrates that the system can distinguish diffraction peak position changes of 0.36%. |
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| Keywords: | structural design deflection sensitivity electron diffraction spatial resolution |
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