Femtosecond electron pulse compression by using the time focusing technique in ultrafast electron diffraction

We present a new model of an electron gun for generating subrelativistic femtosecond （fs） electron pulses. The basic idea is to utilize a dc acceleration stage combined with a time focusing region, the time focusing electrode generates an electron energy chirp for bunching at the target. Without con...

Full description

Saved in:
Bibliographic Details
Published inChinese physics B Vol. 20; no. 11; pp. 228 - 232
Main Author 温文龙 雷晓红 胡昕 徐向晏 王俊锋 曹希斌 刘虎林 王超 党利宏 田进寿
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2011
Subjects
Direct current
Electric potential
Electrodes
Electron energy
Electron pulses
Femtosecond
Focusing
Voltage
时间
有限差分方法
电子脉冲
电子衍射
空间电荷效应
聚焦技术
脉冲压缩
飞秒
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/11/114102

Cover

More Information
Summary:We present a new model of an electron gun for generating subrelativistic femtosecond （fs） electron pulses. The basic idea is to utilize a dc acceleration stage combined with a time focusing region, the time focusing electrode generates an electron energy chirp for bunching at the target. Without considering the space charge effects, simulations of the electron gun were carried out under the conditions of different dc voltages and various slopes of the voltage added on the time focusing electrode. Tracing and simulating large numbers of photoelectrons through Monte-Carlo and finite difference methods, the electron pulses with 1 ps can be compressed to 55 fs, which will allow significant advances in the field of ultrafast diagnosis.
Bibliography:Wen Wen-Long,Lei Xiao-Hong,Hu Xin,Xu Xiang-Yan,Wang Jun-Feng,Cao Xi-Bin,LiuHu-Lin,Wang Chao,Dang Li-Hong,Tian Jin-Sho（a State Key Laboratory of Transient Optics and Photonics, Xi＇an Institute of Optics and Precision Mechanics Chinese Academy of Sciences, Xi＇an 710119, China ; b Graduate University of the Chinese Academy of Sciences, Beijing 100049, China ; c Research Centre of Laser fUsion, China Academy of Engineering Physics, Mianyang 621900, China ; d xi＇an Communications Institution, Xi＇an 710106, China）
We present a new model of an electron gun for generating subrelativistic femtosecond （fs） electron pulses. The basic idea is to utilize a dc acceleration stage combined with a time focusing region, the time focusing electrode generates an electron energy chirp for bunching at the target. Without considering the space charge effects, simulations of the electron gun were carried out under the conditions of different dc voltages and various slopes of the voltage added on the time focusing electrode. Tracing and simulating large numbers of photoelectrons through Monte-Carlo and finite difference methods, the electron pulses with 1 ps can be compressed to 55 fs, which will allow significant advances in the field of ultrafast diagnosis.
time focusing technique; temporal pulse compressing; time-dependent electric field;Monte Carlo method
11-5639/O4
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/11/114102