^pKey;
Laboratory;
of;
Transient;
Optics;
and;
Photonics;
Xi'an;
Institute;
Precision;
Mechanics;
Chinese;
Academy;
Sciences;
710119;
China;
^pUniversity;
the;
Beijing;
100049;
^pCentre;
Laser;
Fusion;
Engineering;
Physics;
Mianyang;
621900;
^pCommunications;
Institution;
710106;
脉冲压缩; 电子衍射; 时间; 聚焦技术; 飞秒; 空间电荷效应; 有限差分方法; 电子脉冲;