Design and Efficiency Enhancement of Klystron-Like Relativistic Backward Wave Oscillator With Triple Cavity Extractor
- Resource Type
- Periodical
- Authors
- Verma, P.; Thottappan, M.
- Source
- IEEE Transactions on Electron Devices IEEE Trans. Electron Devices Electron Devices, IEEE Transactions on. 70(4):1929-1935 Apr, 2023
- Subject
- Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Radio frequency
Magnetic fields
Power generation
Electron tubes
Electric fields
Voltage
Microwave oscillators
Extractor cavity
growth rate
klystron
particle-in-cell (PIC) simulation
relativistic backward wave oscillator (RBWO)
- Language
- ISSN
- 0018-9383
1557-9646
In this article, the design and investigation of an ${X}$ -band klystron-like relativistic backward wave oscillator (KL-RBWO) are presented. The present design includes three extractor cavities at the output Section of KL-RBWO that has been studied for their beam-wave interaction behavior using a finite difference time domain (FDTD) based 3-D electromagnetic (EM) particle-in-cell (PIC) code. The three extractor cavities used in the downstream of KL-RBWO before the collector increased the overall efficiency of the device with a sharp increase in the axial electric field and current in the region. The PIC simulation of the present KL-RBWO predicted an RF power of $\sim $ 2.3 GW at $\sim $ 9.55 GHz with electronic efficiency of $\sim $ 60% for the developed electron beam current of $\sim $ 6.72 kA. A constant microwave generation was observed up to 270 ns under the external guiding magnetic field of 2.9 T.