Multijet cathode for relativistic backward wave oscillator

The paper investigates the generation and transport by multijet cathode of annular intense relativistic electron beam which has been widely used in high power microwave generation. The influence of multijet cathode on the operation of an X-band relativistic backward wave oscillator(RBWO) has been experimentally studied, by using the high-current accelerator SINUS881. The results indicate that, due to its transverse motion, the electron beam will tend to an annularly uniform beam with the increase of cathode jet number, and the output power and pulse width of the RBWO are similar to those of the RBWO with annular cathode.