超快电子脉冲的时域压缩

田进寿; 雷晓红; 温文龙; 徐向晏; 王俊锋

doi:10.3788/OPE.20111910.2379

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超快电子脉冲的时域压缩

现代应用光学 | 更新时间：2020-08-12

- 超快电子脉冲的时域压缩
- Compression of electron pulses in temporal domain
- 光学精密工程 2011年19卷第10期页码：2379-2385
- 作者机构：
  
  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, 陕西西安 710119
  2. 中国科学院研究生院, 北京100049
- 作者简介：
- 基金信息：
  
  国家自然科学青年基金资助项目(No.60901036)();国家自然科学面上基金资助项目(No.60777027)();中科院创新实验室基金资助项目(No.CXJJ-1
- DOI：10.3788/OPE.20111910.2379
  中图分类号： O463;TB872
- 收稿日期：2011-03-01，
  
  修回日期：2011-04-06，
  
  网络出版日期：2011-10-27，
  
  纸质出版日期：2011-10-25
- 稿件说明：
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田进寿, 雷晓红, 温文龙, 徐向晏, 王俊锋. 超快电子脉冲的时域压缩[J]. 光学精密工程, 2011,19(10): 2379-2385

TIAN Jin-shou, LEI Xiao-hong, WEN Wen-long, XU Xiang-yan, WANG Jun-feng . Compression of electron pulses in temporal domain[J]. Editorial Office of Optics and Precision Engineering, 2011,19(10): 2379-2385
田进寿, 雷晓红, 温文龙, 徐向晏, 王俊锋. 超快电子脉冲的时域压缩[J]. 光学精密工程, 2011,19(10): 2379-2385 DOI： 10.3788/OPE.20111910.2379.

TIAN Jin-shou, LEI Xiao-hong, WEN Wen-long, XU Xiang-yan, WANG Jun-feng . Compression of electron pulses in temporal domain[J]. Editorial Office of Optics and Precision Engineering, 2011,19(10): 2379-2385 DOI： 10.3788/OPE.20111910.2379.

摘要

实现电子脉冲在时域上的压缩是提高条纹相机以及超快电子衍射仪等超快诊断仪器时间分辨能力的关键

本文提出用时间聚焦的方法来改善超快诊断技术的时间分辨能力。通过在时间聚焦电极上加随时间线性增加的电场来补偿光电子在光电阴极和阳极之间的时间弥散

从而使快电子相对变慢

慢电子相对变快

达到在时域压缩电子脉冲的目的。用Monte Carlo方法和有限差分法对大量光电子的追踪模拟显示

这种利用随时间变化的电场对电子脉冲速度进行调制的方法可以将初始时间宽度为300 fs的电子脉冲压缩到50 fs

为研制时间分辨能力高于100 fs的条纹相机和超快电子衍射仪等超快诊断技术提供了一种思路。

Abstract

The compression of electron pulses in the temporal domain is a core technique to improve the temporal resolution of ultrafast diagnosis instruments

such as streak cameras and ultrafast electron diffraction systems. In this paper

a time focusing technique is adopted to potentially improve the physical temporal resolutions of streak cameras and ultrafast electron diffraction systems. This method uses a time-dependent acceleration field to greatly compensate the temporal dispersion between photocathode and anode to accelerate the slow electrons and decelerate the fast electrons

relatively. As a result

the temperal dispersion due to an initial energy spread can be compensated to a large extent at the output of time focusing region. Tracing and simulating a large number of photoelectrons through Monte-Carlo and finite difference methods shows that the electron pulse with a 300 fs can be compressed to 50 fs

which lays a powerful foundation for developing the streak cameras and ultrafast e- lectron diffraction systems with better than 100 fs temporal resolution.

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references

BONTE C,HARMAND M,DORCHIES F, et al.. High dynamic range streak camera for subpicosecond time-resolved X-ray spectroscopy[J]. Rev.Sci.Instrum., 2007, 78: 043503.[2] MALONE R M,CAPELLE G A,CELESTE J R,et al.. Overview of the line-imaging VISAR diagnostic at the National Ignition Facility (NIF) [J]. SPIE,2006, 6342:634220-1.[3] BARWICK B,FLANNIGAN D J,ZEWAIL A H.Photon-induced near-field electron microscopy[J]. Nature, 2009, 462:902-906. [4] SUN K X, NISHIMURA W, NEVADA B, et al.. A second-generation X-ray streak camera with true large format, high dynamic range, and high reliability[J]. SPIE,2005, 5920: 592008-1-592008-16.[5] DWYER J R,HEBEISEN C T,MILLER R J D, et al.. Femtosecond electron diffraction: 'making the molecular movie [J]. Phil. Trans. R. Soc. A, 2006,364(1840):741-778.[6] ZAVOISKII E K,FANCHENKO S D. Image converter high speed photography with 10-9~10-14 s time resolution[J]. Applied Optics, 1965, 4(6):1155-1167.[7] SHAKYA M M, CHANG Z H.An accumulative X-ray streak camera with 280 fs resolution[J]. SPIE,2004,5534:125-131.[8] JAANIMAGI P A.Breaking the 100-fs barrier with a streak camera[J].SPIE,2004, 5194:171-182.[9] FENG J,WAN W,QIANG J, et al.. An ultra-fast X-ray streak camera for the study of magnetization dynamics[J]. SPIE, 2005, 5920:592009-1-592009-8.[10] BAUM P, ZEWAIL A H.Breaking resolution limits in ultrafast electron diffraction and microscopy [J]. Proc Natl Acad Sci,2006,103(44): 16105-16110.[11] BAUM P,ZEWAIL A H.Attosecond electron pulses for 4D diffraction and microscopy . Proceedings of the National Academy of Sciences of the United States of America, 2007,104(47):18409-18414.[12] TAKAHASHI A,NISHIZAWA M,INAGAKI Y, et al.. New femtosecond streak camera with temporal resolution of 180 fs [J]. SPIE,2001, 2116:275-283.[13] QIANG J, FENG J, .HUANG G, et al.. Streak camera time resolution improvement using a time-dependent field . Proceedings of PAC07, 2007, FRPMS025: 3973-3975.[14] QIANG J, BYRD J M, FENG J, et al.. X-ray streak camera temporal resolution improvement using a longitudinal time-dependent field[J]. Nuclear Instruments and Methods in Physics Research A, 2009,598:465-469. [15] LIU J, NIU L H, LI J, et al.. Theoretical analysis of a time focus and time amplifier cavity in streak tube[J]. SPIE,2007, 6279:62792I-1.[16] 田进寿,赵宝升, 吴建军,等. 飞秒电子衍射系统中调制传递函数的理论计算[J]. 物理学报,2006, 55(7):3368-3374. TIAN J SH, ZHAO B SH, WU J J, et al.. Theoretical calculation of the modulation transfer function in a femoto-second electron diffraction system[J]. Acta Phys. Sin., 2006, 55(7):3368-3374. (in Chinese)

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