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| Calculation and Simulation of the Electronic Conductance in Double Gap Coupling MBK Cavity |
| Quan Ya-min①②; Ding Yao-gen①; Wang Shu-zhong①; Gao Dong-ping①② |
| ①Key Laboratory of High Power Microwave Sources and Techologies, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;②Graduate University of the Chinese Academy of Sciences, Beijing 100039, China |
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Abstract Based on the single-mode and multi-mode space charge wave theory, the analytical expressions for the electronic conductance in a double gap coupling MBK cavity are derived. The analytical theories show that the single-mode theory is sufficiently accurate for common coupling double gap cavity. In addition, the results of analytical theory are shown to agree well with particle-in-cell simulations. Moreover the effects of the modulation coefficient and axial magnetic field on the electronic conductance are researched by PIC simulation. The results show that the electronic conductance calculated by small signal theory is accurate when the modulation coefficient is less than 0.1 and the magnetic field exceeds 1.5 times of the Brillouin field.
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Received: 09 March 2008
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2009, Vol. 31 
