Journal ArticleDOI
Study of a 35-GHz third-harmonic low-voltage complex cavity gyrotron
TLDR
In this article, a self consistent nonlinear theoretical model for a complex cavity gyrotron with abrupt transitions is presented, which accounts for mode conversion in the transition region of the complex cavity through the general theory of modal expansion techniques.Abstract:
A self consistent nonlinear theoretical model for a complex cavity gyrotron with abrupt transitions is presented in this paper. The model accounts for mode conversion in the transition region of the complex cavity through the general theory of modal expansion techniques. The interaction between the electron beam and TE/sub 61//TE/sub 62/ RF field in the step cavity for a third-harmonic gyrotron is simulated; many calculations are carried out under different electron beam parameters.read more
Citations
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Journal ArticleDOI
A 35-GHz low-voltage third-harmonic gyrotron with a permanent magnet system
Hongfu Li,Zhong-Lian Xie,Wenxiang Wang,Yong Luo,Pinzhong Du,Xue Den,Huajun Wang,Sheng Yu,Xinjian Niu,Li Wang,Shenggang Liu +10 more
TL;DR: In this article, a 35 GHz 45kV third-harmonic complex cavity gyrotron with a permanent magnet system was designed, constructed, and tested with a pulse output power of 147.3 kW at a beam voltage of 45 kV with beam current of 32.2 A.
Journal ArticleDOI
The Nonlinear Designs and Experiments on a 0.42-THz Second Harmonic Gyrotron With Complex Cavity
A. Qixiang Zhao,B. Sheng Yu +1 more
TL;DR: In this article, a 0.42-THz second harmonic gyrotron with complex cavity operating at TE17.4 is numerically simulated and designed by adopting self-consistent nonlinear theory with the first-order transmission line equations.
Journal ArticleDOI
High-Efficiency Excitation of a Third-Harmonic Gyrotron
TL;DR: In this paper, a high- $Q$ cavity is proposed to achieve high interaction efficiency and simultaneously suppress mode competition in a third-harmonic TE02 mode gyroron, and the physical mechanism during the mode formation process is theoretically investigated according to frequency-domain and time-domain nonlinear theories.
Journal Article
35-GHz 25-kW CW low-voltage third-harmonic gyrotron : Special issue on high power microwave generation
TL;DR: In this paper, a 50kV third-harmonic gyrotron with sliced circuits for mode control was evaluated with a large-signal non-self-consistent particle-tracing simulation code and found to be capable of producing 25 kW continuously.
Journal ArticleDOI
The nonlinear simulation, design and experiments on 0.42 THz gyrotron with gradually tapered complex cavity
TL;DR: In this paper, a second harmonic complex cavity gyrotron operating at 0.42 GHz was designed to suppress mode competition by locking a pair of operating modes in two single cavities.
References
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Journal ArticleDOI
A self-consistent field theory for gyrotron oscillators: application to a low Q gyromonotron
TL;DR: In this article, an application of a self-consistent field theory for gyrotron oscillators to a low Q TE01 mode gyromonotron was presented, where the RF field profile function satisfies a wave equation in which the AC beam current appears as a source.
Journal ArticleDOI
Theory of electron cyclotron maser interaction in a cavity at the harmonic frequencies
TL;DR: In this article, a theory of the cyclotron maser interaction between an annular electron beam and the standing electromagnetic wave in a cavity structure is formulated on the basis of the relativistic Vlasov equation and the Maxwell equations.
Journal ArticleDOI
Realization of a Stable and Highly Efficient Gyrotron for Controlled Fusion Research
Y. Carmel,Kwo Ray Chu,M. E. Read,A. K. Ganguly,D. Dialetis,R. Seeley,J. S. Levine,V.L. Granatstein +7 more
TL;DR: The beam prebunching section at the input to the cavity of a millimeter-wave gyrotron oscillator has yielded outstanding improvements in mode control and device efficiency as discussed by the authors.
Journal ArticleDOI
Theory of harmonic gyrotron oscillator with slotted resonant structure
Kwo Ray Chu,D. Dialetis +1 more
TL;DR: In this article, a small signal theory of the harmonic gyrotron oscillator with a slotted resonator is presented, where the magnetron-type wall structure has the effect of creating a strong harmonic field near the electron orbits and, as a result, greatly reducing the beam voltage and startoscillation power required for harmonic operations.