Research on coaxial dual-mode relativistic Cherenkov oscillator with low magnetic field and high-efficiency

Zhou Wengang; Deng Rujin; Zhang Peng; Li Jiawen; Zhang Kejia

doi:10.11884/HPLPB202638.250182

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Zhou Wengang, Deng Rujin, Zhang Peng, et al. Research on coaxial dual-mode relativistic Cherenkov oscillator with low magnetic field and high-efficiency[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250182

Citation:

Zhou Wengang, Deng Rujin, Zhang Peng, et al. Research on coaxial dual-mode relativistic Cherenkov oscillator with low magnetic field and high-efficiency[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250182

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Research on coaxial dual-mode relativistic Cherenkov oscillator with low magnetic field and high-efficiency

doi: 10.11884/HPLPB202638.250182

College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China

Received Date: 2025-06-24
Accepted Date: 2025-07-29
Rev Recd Date: 2025-10-02

Available Online: 2025-11-21

Abstract

Abstract

Achieving high-efficiency and high-power operation under low magnetic fields is an important development trend for high-power microwave sources. In order to enhance the efficiency of high-power microwave source under low guiding magnetic fields, a high-efficiency coaxial dual-mode relativistic Cherenkov oscillator (RCO) under a low guiding magnetic field is proposed. The RCO works in both coaxial quasi-TEM mode and TM₀₁ mode and realizes high-efficiency output in low magnetic field (＜0.4 T). In particle-in-cell simulation, when the guiding magnetic field is only 0.35 T, the RCO achieves a microwave output of 3 GW with a beam-wave conversion efficiency of 40%. At the same time, aiming at the RF breakdown phenomenon in the experiment, the power capacity is improved by increasing the number of slow wave structure periods, which is verified by both simulation and experiment. In the experiment, under a magnetic field of 0.37 T, the output power is 2.85 GW with a pulse width of 57 ns and conversion efficiency of 34%. The experimental results obtained under the low magnetic field provide strong support for the development of miniaturization of high-power microwave systems.
- High power microwave,
- Low magnetic field,
- High efficiency,
- Relativistic Cherenkov oscillator,
- Dual-mode operation

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References(20)

References

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