Experimental investigation of L-band relativistic magnetron at long-term steady operation

To achieve long-term steady operation of high power microwave source, relativistic magnetron (RM) with diffraction output has been investigated for long-term operation. Experimental investigation was carried out based on an L-band relativistic magnetron with diffraction output. This paper introduces the structure of L-band RM with diffraction output as well as experimental setup and presents test method for the parameters. Operation time longer than 55 min has been obtained with output power of more than 1 GW and rep-rate of 10 Hz. The frequency is 1.57 GHz. The tube works steadily in the long-term operation and no mode competition has been observed.