Huang Yinhu

Experimental study of a 95GHz gyrotron

A 95GHz gyrotron has been developed which has achieved operation of 30.1kW/600s with an inside quasi-optical system. A triode magnetron injection gun, a TE62-mode cavity and a single-stage depress collector are adopted in the design, which predictes a power of 37kW generated from the cavity. The RF power is then changed into gaussian beam by the quasi-optical system with an efficiency of 85%. The design and the experimental results shows good consistency with each other.

Three-dimensional simulation of 14-vanes 5.8GHz strapped magnetron

The performance of 14-vanes 5.8GHz strapped magnetron is modeled, including cathode, vane, straps, pole pieces and output antenna using three-dimensional electromagnetic simulation code. The electric field distribution in the cold cavity simulation and the formation of the seven electron spokes confirm the π mode work in the oscillation cavity region. The output frequency 5.787GHz and output power 5.4kW in the hot test simulation is obtained in the uniform magnetic field distribution condition. The magnetron with an efficiency of 60% is operated at the beam voltage 4.5kV, the anode current 2.0A when the external axial magnetic field of 0.235T is applied. The simulation values by Fourier transformation of the voltage signal show a good output frequency spectrum.