光子学报, 2009, 38 (9): 2196, 网络出版: 2010-05-10
基于相对论修正的飞秒电子衍射系统
Femtosecond Electron Diffraction System Based on the Relativity Correction
超快电子衍射 偏转扫描系统 相对论修正 Ultrafast dlectron diffraction Deflection and scanning system Relativity correction
摘要
对工作于扫描状态下的飞秒电子衍射系统电子束偏转量的计算方法作了理论研究.讨论了超短电子脉冲宽度的测量方法, 比较了相对论效应对电子束的偏转量及对电子束脉冲宽度的的影响, 并做了相应的数值计算.计算结果显示, 在忽略了电场的边缘效应等因素后, 电子束轴向速度的相对论修正与否对偏转距离和电子束脉冲宽度的影响分别达到20 mm和65 fs.
Abstract
The deflection-scan sub-system of the femtosecond electron diffraction system was theoretically studied and a more exact solution of the deflection distance was obtained.The numerical calculation under relativity correction and non-relativity correction both show that even more information of the scan system can be obtained by the dynamic analysis,of which the difference of the deflection distance is about 61.4 mm,and the difference of the electron pulse width is about 65 fs.
吴建军, 李军科, 田进寿, 赵宝升, 张杰. 基于相对论修正的飞秒电子衍射系统[J]. 光子学报, 2009, 38(9): 2196. WU Jian-jun, LI Jun-ke, TIAN Jin-shou, ZHAO Bao-sheng, ZHANG Jie. Femtosecond Electron Diffraction System Based on the Relativity Correction[J]. ACTA PHOTONICA SINICA, 2009, 38(9): 2196.
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