Particle simulation of compact P-band relativistic backward wave oscillator

Experimental study of a compact P-band coaxial relativistic backward wave oscillator with three periods slow wave structure

“…Typical simulation results show that, with a 585 keV and 7.85 kA electron beam guided by a 0.8 T magnetic field, a microwave of 1.65 GW can be generated at a frequency of 900 MHz, and the interaction efficiency is about 36%. Compared with the earlier conventional P-band coaxial RBWO mentioned above, 26 the axial length of the SWS is reduced by about one half, which is only 38.4 cm, and the saturation time of the microwave signal is reduced by about 10 ns. In this paper, we present the experimental results, which have been obtained in our laboratory for verifying the physical design and the simulation results of the device.…”

“…Moreover, in order to reduce the longitudinal dimension of the RBWO, five periods SWS was chosen using the resonance properties of a coaxial extractor structure in the L-band RBWO. 24,25 However, if five periods SWS is applied to design a P-band RBWO, 26 the axial length of the SWS will be more than 75 cm, and the microwave pulse saturation time will be larger than 35 ns, which, as a result, may also bring some difficulties in the experiments and practical applications.…”