Abstract This paper analyses a three-cavity frequency-quadrupling terahertz gyroklystron with successive frequency-doubling in each cavity with self-consistent nonlinear theory. The beam--wave interaction efficiency and the electron bunching process are studied. The variation of output efficiency with the length of drift tubes and output power and the variation of Ohmic loss with the length of output cavity are considered. Numerical simulations predict an optimal output efficiency of 1.8%, a power output of more than 2 kW and a gain of 33 dB after taking into account Ohmic losses when the frequency-quadrupling gyroklystron, driven by a 40-kV, 3-A electron beam and 1 Watt input power, operates at 225 GHz.
Received: 27 February 2009
Revised: 07 April 2009
Accepted manuscript online:
Fund: Project supported by National Natural Science Foundation of China (Grant
No 10676110) and 973 Program of China (Grant No 2007CB310401).
Cite this article:
Liu Di-Wei(刘頔威),Yuan Xue-Song(袁学松), Yan Yang(鄢扬), and Liu Sheng-Gang(刘盛纲) Self-consistent nonlinear analysis of a frequency-quadrupling terahertz gyroklystron 2009 Chin. Phys. B 18 5507
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