Efficiency enhancement of L-band relativistic magnetron with endcaps

Liu Zeyang; Li Sirui; Fan Yuwei; Wang Xiaoyu

doi:10.11884/HPLPB202133.210119

Volume 33 Issue 7

Jul. 2021

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Article Navigation > High Power Laser and Particle Beams > 2021 > 33(7): 073006

Liu Zeyang, Li Sirui, Fan Yuwei, et al. Efficiency enhancement of L-band relativistic magnetron with endcaps[J]. High Power Laser and Particle Beams, 2021, 33: 073006. doi: 10.11884/HPLPB202133.210119

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Liu Zeyang, Li Sirui, Fan Yuwei, et al. Efficiency enhancement of L-band relativistic magnetron with endcaps[J]. High Power Laser and Particle Beams, 2021, 33: 073006. doi: 10.11884/HPLPB202133.210119

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Efficiency enhancement of L-band relativistic magnetron with endcaps

doi: 10.11884/HPLPB202133.210119

1.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China

Funds: National Natural Science Foundation of China (61671457, 61871390); Hunan Provincial Innovation Foundation for Postgraduate (CX2016B030)

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Author Bio:
Liu Zeyang (1995—), male, master degree candidate, teaching assistant, engaged in high power microwave research
Corresponding author: Fan Yuwei(1972—), male, PhD, professor, engaged in high power microwave research
Received Date: 2021-03-29
Rev Recd Date: 2021-06-02

Available Online: 2021-06-25

Publish Date: 2021-07-15

Abstract

Abstract

An L-band relativistic magnetron with cathode endcaps is presented and investigated numerically. Cathode endcaps are introduced in the relativistic magnetron to decrease the axial leakage current and enhance the power efficiency. Three-dimensional particle-in-cell simulations are carried out to investigate the effects of the cathode endcaps. The simulation results indicate that when adding cathode endcaps at both upstream and downstream of the interaction space and extending cathode beyond the anode block into the diffraction output (DO), electron leakage current is reduced from above 1 kA to 72 A and the power efficiency increases obviously. The endcaps can not only decrease the leakage current but also bring microwave reflection. Thus, the radius and the location of the endcaps have significant impact on power efficiency, and they have optimum values to make the efficiency highest. Typical optimized simulation results are as follows: working at an applied voltage of 563 kV and a magnetic field of 0.34 T, the relativistic magnetron with diffraction output (MDO) radiates microwave of 2.13 GW at 1.59 GHz, and the corresponding power conversion efficiency is 75.5%.
- relativistic magnetron,
- cathode priming,
- high efficiency,
- cathode endcap

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References

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