학술논문
Experimental Demonstration of Dual-Mode Relativistic Backward Wave Oscillator With a Beam Filtering Ring Packaged With Permanent Magnet
Document Type
Periodical
Source
IEEE Electron Device Letters IEEE Electron Device Lett. Electron Device Letters, IEEE. 44(4):662-665 Apr, 2023
Subject
Language
ISSN
0741-3106
1558-0563
1558-0563
Abstract
It is reported on the design and experiment of a dual-mode (TM01-TM02) relativistic backward wave oscillator (RBWO) with a beam filtering ring (BFR) packaged with permanent magnet. The BFR makes use of the large transverse oscillation of electrons at low magnetic field. By absorbing part of the electron beam periodically, the amount of the electrons that would absorb power from the microwave in the slow-wave structure (SWS) is greatly reduced, so the beam-wave conversion efficiency is improved. Experimental results demonstrate that a 3.2 GW mixed-modes microwave at 9.87 GHz with an efficiency of 40% is obtained with a 675 kV, 11.8 kA beam guided by a 0.68 T magnetic field. The BFR has a considerable lifetime and can effectively improve the efficiency of the device with stable operation.