Journal of Infrared and Millimeter Waves, Volume. 41, Issue 2, 457(2022)
The multi-modes, multi-harmonics behavior of a THz large-orbit gyrotron
Fig. 2. The variation of the total quality factor,diffraction quality factor,ohmic loss quality factor and the oscillation frequencies of the designed modes with the azimuthal index(
Fig. 3. Radial distribution of the azimuthal electric field
Fig. 4. The starting current variation with external magnetic field,where the beam voltage is 250 kV,the pitch factor is 2.0
Fig. 5. The nonlinear output power and output frequency variation with the external magnetic field
Fig. 6. Dispersion diagram of the cylindrical waveguide modes and the synchronism condition when the external magnetic field is 2.71 T and 2.76 T
Fig. 7. The nonlinear output power and output frequency variations with the beam current when the magnetic fields for
Fig. 8. The electric field distribution of the
Fig. 9. The spectrum of the output signal. The inset shows the variations of the mode amplitude of
Fig. 10. The output power and output frequency variations with the external magnetic field when the beam voltage is 250 kV and beam current is 3.0 A
Fig. 11. The transverse view of the electron beams when operating at different harmonics(a)the unperturbed large-orbit electron beams,(b)the azimuthal bunching at the 9th harmonic(when B=2.71 T),(c)the azimuthal bunching at the 8th harmonic(when B=2.73 T),(d)the azimuthal bunching at the 7th harmonic(when B=2.77T)
Fig. 12. The output amplitude variation with time when B=2.77 T and I=3 A. The inset is the spectrum of the output signal.
Fig. 13. The output power and frequency variation with wall conductivity when B=2.72 T and I=3A.
Fig. 14. The output power and output frequency variation with the beam current when the external magnetic field is 2.71 T,2.72 T,and 2.77 T,respectively
Fig. 15. The output power variation with time when B=2.72 T and I=4.5A. The inset is the spectrum of the output signal
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Qi-Xiang ZHAO, Meng-Shi MA, Xiang LI, You LV, Tian-Zhong ZHANG, Lin PENG, E-Feng WANG, Jin-Jun FENG. The multi-modes, multi-harmonics behavior of a THz large-orbit gyrotron[J]. Journal of Infrared and Millimeter Waves, 2022, 41(2): 457
Category: Research Articles
Received: Aug. 16, 2021
Accepted: --
Published Online: Jul. 8, 2022
The Author Email: Xiang LI (xiang.li@dynexsemi.com)