Study on the terahertz coaxial gyrotron cavity with a tapered inner rod

The resonant frequency, the diffractive quality factor in the coaxial gyrotron cavity with a tapered inner rod have been investigated. The resonant frequency and the diffractive quality factor can be adjusted by changing the tilt angle of the tapered inner rod and the ratio of the inner and outer radii. The mode competition can be improved with an appropriate design of the tilt angle of the tapered inner rod and the ratio of the inner and outer radii in a coaxial gyrotron cavity with a tapered inner rod.