Preliminary experimental study on inner-emitting coaxial vircator

Experimental study on coaxial vircatoris carried out on SINUS accelerator is introduced in this paper. Narrow band high power microwave is obtained and measured in several methods which ensures the accuracy. The result shows that the dominant mode of the output microwave is TE11 in a coaxial vircator without anode reflector. With 300kV diode voltage and 18kA diode current, the generted microwave power is about 200MW at 2.7GHz operating frequency, the conversion efficiency is about 3.6%．