摘要
Using proper beam energy chirp and the undulator detuning effect,we propose a modified optical replica synthesizer scheme to characterize the temporal structure of a relativistic electron bunch,which predicts a 100-fs temporal resolution in numerical simulation.The proof of principle experiment demonstrates a peak current of 9 A and a slice energy spread of about 0.5 keV for the uncompressed electron beam of the Shanghai Deep UV Free Electron Laser Facility.
基金
Supported by the National Natural Science Foundation of China under Grant No 11175240
the Shanghai Natural Science Foundation under Grant No 09JC1416900.
