Design and fabrication of beam transmission system for terahertz extended interaction oscillator

The extended interaction oscillator (EIO) is considered to be a novel type of high power Terahertz (THz) source, which has a promising application prospects in Radar, medical imaging, etc. Up to now, CPI and other institutes have developed this type of EIO. The investigation on the J-band (220GHz-325GHz) EIO at the Institute of Electronics, Chinese Academy of Sciences (IECAS) is being developed. The electric and structural designs for the J-band EIO have been accomplished, in which many technical problems are continued to be resolved. The design of electron optical system for EIO is finished and the permanent magnetic uniform field is adopted. This paper presents mainly the design of electron optical system for the J-band EIO in detail.