Theoretical calculation of the modulation transfer function in a femoto-second electron diffraction system

Tian Jin-Shou; Zhao Bao-Sheng; Wu Jian-Jun; Zhao Wei; Liu Yun-Quan; Zhang Jie

doi:10.7498/aps.55.3368

Abstract
This article has introduces the basic components and characteristics of a femoto-second electron diffraction system, i.e. the photo-cathode, magnetic lens, deflector and detector with doubled MCP etc., and demonstrated our design method and results. The photo-cathode is an Ag film deposition on a sapphire disk and the femtosecond electron pulses are accelerated to 50 keV through an extraction electric field of 10kV/mm between the photocathode and the extraction mesh. After extraction, the electron pulses are reshaped in size by a 100 μm pinhole, which screens out electrons with larger elevation angle and makes the passed electrons flying almost parallel to the axis, which results in a reduced electron beam spot. The beam is collimated with a magnetic lens and positioned to the sample by a pair of deflection plates for diffraction measurements. The electron diffraction images are recorded with a two-dimensional imaging system composed of a Chevron-type microchannel plate and a P20 phosphor screen on an optical-fiber faceplate. The initial position, kinetic energy and angle distribution of the photoelectrons is sampled with Monte Carlo method. The electric field is calculated with finite difference formula, and the magnetic flux of the focus region is calculated with finite elements methods, and the electron trajectory is traced with Runge-Kutta method. We analysized the temporal and spatial distribution of 3000 electrons when they reached the prime plane and give out the temporal and spatial modulation transfer function of the femoto-diffraction system.

Keywords:
femotosecond electron gun /

finite difference method /

Monte-Carlo method /

modulation transfer function
Authors and contacts
Tian Jin-Shou²,

Zhao Bao-Sheng²,

Wu Jian-Jun²,

Zhao Wei²,

Liu Yun-Quan¹,

Zhang Jie¹

(1)中国科学院物理研究所,北京 100080; (2)中国科学院西安光学精密机械研究所瞬态光学与光子学国家重点实验室, 西安 710068
References

Cited By

[1]	Liu Shang-Kuo, Wang Tao, Li Kun, Cao Kun, Zhang Xi-Bin, Zhou Yan, Zhao Jian-Ke, Yao Bao-Li. Influence of spectral characteristics of light sources on measuring space camera modulation transfer function. Acta Physica Sinica, 2021, 70(13): 134208. doi: 10.7498/aps.70.20201575
[2]	Wang Chao, Zhou Yan-Li, Wu Fan, Chen Ying-Cai. Monte Carlo simulation on the adsorption of polymer chains on polymer brushes. Acta Physica Sinica, 2020, 69(16): 168201. doi: 10.7498/aps.69.20200411
[3]	Zhao Yun-Jin, Tian Meng, Huang Yong-Gang, Wang Xiao-Yun, Yang Hong, Mi Xian-Wu. Renormalization of photon dyadic Green function by finite element method and its applications in the study of spontaneous emission rate and energy level shift. Acta Physica Sinica, 2018, 67(19): 193102. doi: 10.7498/aps.67.20180898
[4]	Wang Chao, Chen Ying-Cai, Zhou Yan-Li, Luo Meng-Bo. Diffusion of diblock copolymer in periodical channels:a Monte Carlo simulation study. Acta Physica Sinica, 2017, 66(1): 018201. doi: 10.7498/aps.66.018201
[5]	Duan Ya-Xuan, Liu Shang-Kuo, Chen Yong-Quan, Xue Xun, Zhao Jian-Ke, Gao Li-Min. A method to measure the modulation transfer function of Bayer filter color camera. Acta Physica Sinica, 2017, 66(7): 074204. doi: 10.7498/aps.66.074204
[6]	Qing Shao-Wei, Li Mei, Li Meng-Jie, Zhou Rui, Wang Lei. Effect of wall secondary electron distribution function on the characteristics of stable sheath near a dielectric wall. Acta Physica Sinica, 2016, 65(3): 035202. doi: 10.7498/aps.65.035202
[7]	Zheng Hui, Zhang Chong-Hong, Chen Bo, Yang Yi-Tao, Lai Xin-Chun. Inhibition effect of low-temperature pre-irradiation of helium ions on the growth of helium bubble in stainless steel：a Monte Carlo simulation. Acta Physica Sinica, 2014, 63(10): 106102. doi: 10.7498/aps.63.106102
[8]	Wang Yue, Liu Li-Wei, Hu Si-Yi, Li Qi-Yang, Sun Zhen-Hao, Miao Xin-Hui, Yang Xiao-Chuan, Zhang Xi-He. Simulation study based on the COMSOL Mutiphysics to the surface plasmon resonance of Cu2S quantum dots. Acta Physica Sinica, 2013, 62(19): 197803. doi: 10.7498/aps.62.197803
[9]	Yu Ge, Han Qi-Gang, Li Ming-Zhe, Jia Xiao-Peng, Ma Hong-An, Li Yue-Fen. Finite element analysis of the high-pressure tungsten carbide radius-anvil. Acta Physica Sinica, 2012, 61(4): 040702. doi: 10.7498/aps.61.040702
[10]	Guo Bao-Zeng, Zhang Suo-Liang, Liu Xin. Electron transport property in wurtzite GaN at high electric field with Monte Carlo simulation. Acta Physica Sinica, 2011, 60(6): 068701. doi: 10.7498/aps.60.068701
[11]	Gao Qian, Lou Xiao-Yan, Qi Yang, Shan Wen-Guang. Monte Carlo simulation on the property of ferromagnetic order of Zn1- x Mn x O Nanofilms. Acta Physica Sinica, 2011, 60(3): 036401. doi: 10.7498/aps.60.036401
[12]	Liu Quan-Xi, Zhong Ming. Analysis on thermal effect of laser-diode array end-pumped composite rod laser by finite element method. Acta Physica Sinica, 2010, 59(12): 8535-8541. doi: 10.7498/aps.59.8535
[13]	Han Qi-Gang, Ma Hong-An, Xiao Hong-Yu, Li Rui, Zhang Cong, Li Zhan-Chang, Tian Yu, Jia Xiao-Peng. Finite element method study on the temperature distribution in the cell of large single crystal diamond. Acta Physica Sinica, 2010, 59(3): 1923-1927. doi: 10.7498/aps.59.1923
[14]	Yao Wen-Jing, Wang Nan. Monte Carlo simulation of thermophysical properties of Ni-15%Mo alloy melt. Acta Physica Sinica, 2009, 58(6): 4053-4058. doi: 10.7498/aps.58.4053
[15]	Huang Chao-Jun, Liu Ya-Feng, Long Shu-Ming, Sun Yan-Qing, Wu Zhen-Sen. Monte Carlo simulation of transfer-characteristics of electromagnetic wave propagating in soot. Acta Physica Sinica, 2009, 58(4): 2397-2404. doi: 10.7498/aps.58.2397
[16]	Han Qi-Gang, Jia Xiao-Peng, Ma Hong-An, Li Rui, Zhang Cong, Li Zhan-Chang, Tian Yu. Finite element simulations of thermal-stress on cemented tungsten carbide anvil used in cubic high pressure apparatus. Acta Physica Sinica, 2009, 58(7): 4812-4816. doi: 10.7498/aps.58.4812
[17]	Qi Xun-Jun, Lin Bin, Cao Xiang-Qun, Chen Yu-Qing. Study of modular transfer function-based optieal low-pass filter evaluation model and experiment. Acta Physica Sinica, 2008, 57(5): 2854-2859. doi: 10.7498/aps.57.2854
[18]	Gao Guo-Liang, Qian Chang-Ji, Zhong Rui, Luo Meng-Bo, Ye Gao-Xiang. Monte Carlo simulation of cluster growth on an inhomogeneous substrate. Acta Physica Sinica, 2006, 55(9): 4460-4465. doi: 10.7498/aps.55.4460
[19]	Xiao Pei, Zhang Zeng-Ming, Sun Xia, Ding Ze-Jun. Monte Carlo simulation of electron transmission through masks in projection electron lithography. Acta Physica Sinica, 2006, 55(11): 5803-5809. doi: 10.7498/aps.55.5803
[20]	SHANG YE-CHUN, ZHANG YI-MEN, ZHANG YU-MING. MONTE CARLO SIMULATION OF ELECTRON TRANSPORT IN 6H-SiC. Acta Physica Sinica, 2000, 49(9): 1786-1791. doi: 10.7498/aps.49.1786

Catalog

Vol. 55, Issue 7 - 2006-04-05

Metrics

Abstract views: 9088
PDF Downloads: 1612
Cited By: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

Search

Article

留言板

Theoretical calculation of the modulation transfer function in a femoto-second electron diffraction system

Abstract

Authors and contacts

References

Cited By

Catalog

Metrics

Authors

Referees

About Journal

About

Search

Article

留言板

Theoretical calculation of the modulation transfer function in a femoto-second electron diffraction system

Abstract

Authors and contacts

References

Cited By

Catalog

Metrics

Publishing process

Authors

Referees

About Journal

About