Super-radiation Terahertz Source Based On Sub-picosecond Electron Beam At CTFEL

China Academy of Engineering Physics Terahertz Free Electron Laser (CTFEL) works in the range of 0.7 similar to 4.2 THz. To expand the range below 0.1 THz, we developed a super-radiation terahertz (THz) source based on sub-picosecond electron beam behind CTFEL. The sub-picosecond electron beam was generated by velocity compression and then injected into undulator to provide THz wave. In this proceeding, the preliminary experimental results of super-radiation terahertz source were reported.