Design of W-band 5–10 MW output power relativistic gyrotron

The 3-mm band relativistic gyrotron excited by 250 keV electron beam with record output parameters (power 5–10 MW, efficiency 35–40%, microwave pulse duration 0.5–1 $\mu$s) was developed. The main design solutions of components, such as the electronoptical system forming helical electron beam, the interaction space and the electrodynamic system of microwave output, are presented.