Gigawatt-Class Radiation of ${rm TM}_{01}$ Mode From a Ku-Band Overmoded Cerenkov-Type High-Power Microwave Generator

摘要

We present the numerical and experimental results of a Ku-band overmoded Cerenkov-type high-power microwave oscillator. A pulsed power accelerator working at a voltage of 740 kV was employed to generate relativistic electron beams with a peak current of 9.9 kA, which were guided through the overmoded slow wave structures by an axial magnetic field of 0.8 T. The investigated generator produced microwave pulse with a duration of 24 ns, at a central frequency of 13.76 GHz, and with power as high as 1.1 GW, corresponding to power conversion efficiency of about 15%. The operating mode was well controlled in quasi-single mode of ${rm TM}_{01}$ .