Dual-cavity mode converter for a fundamental mode output in an over-moded relativistic backward-wave oscillator

Journal Article · Mon Mar 16 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4915892· OSTI ID:22395778

Li, Jiawei; Huang, Wenhua ^[1]; Xiao, Renzhen; Bai, Xianchen; Zhang, Yuchuan; Zhang, Xiaowei; Shao, Hao; Chen, Changhua ^[2]; Zhu, Qi ^[1]

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1. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027 (China)
2. Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)

A dual-cavity TM{sub 02}–TM{sub 01} mode converter is designed for a dual-mode operation over-moded relativistic backward-wave oscillator. With the converter, the fundamental mode output is achieved. Particle-in-cell simulation shows that the efficiency of beam-wave conversion was over 46% and a pureTM{sub 01} mode output was obtained. Effects of end reflection provided by the mode converter were studied. Adequate TM{sub 01} mode feedback provided by the converter enhances conversion efficiency. The distance between the mode converter and extraction cavity critically affect the generation of microwaves depending on the reflection phase of TM{sub 01} mode feedback.

• OSTI ID: 22395778
• Journal Information: Applied Physics Letters, Vol. 106, Issue 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
CONVERSION
DISTANCE
EFFICIENCY
FEEDBACK
MICROWAVE RADIATION
OPERATION
OSCILLATORS
REFLECTION
RELATIVISTIC RANGE