supported the Young Scientists Fund of the National Natural Science Foundation of China(Grant No.60901036);the National Natural Science Foundation of China(Grant No.60777027);the Innovation Laboratory Fund of the Chinese Academy of Sciences(Grant No.CXJJ-10-S13)
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...