Development progress of relativistic multi-beam

Wang Ganping; Jin Xiao; Li Chunxia; Huang Hua; Liu Zhenbang; Li Lele

doi:10.11884/HPLPB201830.170279

Volume 30 Issue 2

Feb. 2018

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Article Navigation > High Power Laser and Particle Beams > 2018 > 30(2): 023002

Wang Ganping, Jin Xiao, Li Chunxia, et al. Development progress of relativistic multi-beam[J]. High Power Laser and Particle Beams, 2018, 30: 023002. doi: 10.11884/HPLPB201830.170279

Citation:

Wang Ganping, Jin Xiao, Li Chunxia, et al. Development progress of relativistic multi-beam[J]. High Power Laser and Particle Beams, 2018, 30: 023002. doi: 10.11884/HPLPB201830.170279

Wang Ganping, Jin Xiao, Li Chunxia, et al. Development progress of relativistic multi-beam[J]. High Power Laser and Particle Beams, 2018, 30: 023002. doi: 10.11884/HPLPB201830.170279

Citation:

Wang Ganping, Jin Xiao, Li Chunxia, et al. Development progress of relativistic multi-beam[J]. High Power Laser and Particle Beams, 2018, 30: 023002. doi: 10.11884/HPLPB201830.170279

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Development progress of relativistic multi-beam

doi: 10.11884/HPLPB201830.170279

Wang Ganping^{1, 2
,},
Jin Xiao¹,
Li Chunxia¹,
Huang Hua¹,
Liu Zhenbang¹,
Li Lele^{1, 2}

1.
Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, CAEP, P. O. Box 919-1015, Mianyang 621900, China
2.
Graduate School of China Academy of Engineering Physics, Beijing 100088, China

Received Date: 2017-07-10
Rev Recd Date: 2017-09-30
Publish Date: 2018-02-15

Abstract

Abstract

This paper introduces the studies on the relativistic multi-beam electron gun with different structures. The theoretic analysis and experimental results show that the spot distortion is obvious with fan-shaped multi-beam cathode due to the nonuniformity of the surface electric field. Furthermore, the fan-shaped beam rotation around the beam center, caused by the effect of space electromagnetic field, exasperates the beam distortion and reduces the transmission efficiency evidently. Whereas, the electric field on the surface of cylindrical multi-beam cathode is more uniform, which restrains the spot distortion. Meanwhile, the self-center rotation can not change the beam profile with the columned form. Considering the emission from the multi-cathode rods and cathode base, the transmission efficiency of the multi-beam is limited. In addition, the strong beam impaction on the multi-beam waveguide could lead to intense current transport cutoff. It is effective to increase the transmission efficiency by enlarging the inner radius of magnetic system. At present, the output power of multi-beam klystron can get to the order of gigawatt with multi-beam power 6.5 GW and transmission efficiency 89%.
- high power microwave,
- high current relativistic multi-beam,
- spot distortion,
- transmission efficiency

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References(10)

References

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