A study on the high-order mode oscillation in a four-cavity intense relativistic klystron amplifier

Journal Article · Fri Jul 15 04:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4953449· OSTI ID:22600041

Liu, Ying-Hui; Niu, Xin-Jian; Wang, Hui ^[1]; Jia, Nan; Duan, Yaoyong ^[2]; Li, Zheng-Hong ^[3]; Cheng, Hui ^[4]; Yang, Xiao-Chuan ^[5]

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1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu (China)
2. The Chinese People's Armed Police Force Academy, Hebei (China)
3. Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, CAEP, Mianyang (China)
4. Microwave Department, Sichuan Jiuzhou Electric Appliance Group Co., Ltd., Mianyang (China)
5. Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang (China)

The high-order mode oscillation is studied in designing a four-cavity intense relativistic klystron amplifier. The reason for the oscillation caused by high-order modes and a method to suppress these kinds of spurious modes are found through theoretical analyses and the study on the influence of major parameters of a high frequency structure (such as the oscillation frequency of cavities, the cavity Q value, the length of drift tube section, and the characteristic impedance). Based on much simulation, a four-cavity intense relativistic klystron amplifier with a superior performance has been designed, built, and tested. An output power of 2.22 GW corresponding to 27.4% efficiency and 61 dB gain has been obtained. Moreover, the high-order mode oscillation is suppressed effectively, and an output power of 1.95 GW corresponding to 26% efficiency and 62 dB gain has been obtained in our laboratory.

• OSTI ID: 22600041
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 23; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLIFIERS
CAVITY RESONATORS
DESIGN
DRIFT TUBES
EFFICIENCY
GAIN
IMPEDANCE
KLYSTRONS
LENGTH
OSCILLATION MODES
OSCILLATIONS
PERFORMANCE
Q-VALUE
RELATIVISTIC RANGE
SIMULATION