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Plasma Sci. Technol. ›› 2019, Vol. 21 ›› Issue (8): 085505.doi: 10.1088/2058-6272/ab20df

• Plasma Technology • Previous Articles     Next Articles

Effect of cyclotron resonance on ‘hot’ dispersion in a staggered double metallic grating sheet beam travelling wave tube

Jing WANG (王晶)1,2,3, Yu FAN(樊宇)2, Chen YANG (杨晨)2,3, Ding ZHAO (赵鼎)2,#br# Gang WANG (王刚)1,2,3 and Jirun LUO (罗积润)2,3   

  

  1. 1 Research and Development Center of Space TWT, Beijing 100190, People’s Republic of China
    2 Key Laboratory of High Power Microwave Sources and Technologies, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
    3 University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
  • Received:2019-01-25 Revised:2019-05-08 Accepted:2019-05-10 Published:2019-06-18
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No. 61671431).

Abstract: Based on the beam wave synchronous interaction in transverse and longitudinal directions at the
same time and starting from Maxwell’s equation and linear Vlasov equation, the beam–wave
interaction ‘hot’ dispersion equation considering both cyclotron resonance and Cherenkov
resonance in a staggered double metallic grating traveling wave tube is deduced. Through the
reasonable selection for geometric and electrical parameters, the numerical calculation and
analysis of the ‘hot’ dispersion equation shows that the beam–wave interaction gain and
frequency band with the cyclotron resonance enhancement effect are higher than those with only
Cherenkov resonance radiation.

Key words: staggered double metallic grating, sheet beam travelling wave tube, cyclotron
resonance,
Cherenkov effects, gain