Magnetic compressor is a very important part for SASE FEL facility at Peking University(PKU SASE FEL),which is used to produce short electron bunches in order to satisfy fast lasing saturation of SASE in undulator.

Optimization of Hefei Soft X-Ray FEL Photocathode Injector;

The Synchronization System of Storage Ring FEL Coherent Harmonic Experiment;

Preliminary Design of Compact FEL Terahertz Radiation Source;

Measuring Bunching of Electron Beam in Free-Electron Laser by Coherent Transit Radiation;

Using energy-chirped electron beam free-electron laser to amplifiy chirped pulse;

In this paper, we present a general theory of the double-undulator free-electron laser, in which an additional undulator with period close to the beam electron betatron oscillation period in the main undulator is introduced.

Go further into the primary theory of free electron laser;

spontaneous emission of free electron laser with an electrostatic wiggler;

The efficiency enhancement mechanism of far infrared free electron laser(FIR FEL) with a reverse tapering waveguide is theoretically investigated.

Imaging theory and development of THz free electron lasers;

A Raman free electron laser(FEL) beam with a pseudospark discharge has been simulated numerically by nonlinear model.

This paper reports an analysis of problem about impedance match of pseudospark e-beam source of free electron laser and the experiment results on compact device without pulse transmission line.