Analysis of parasitic oscillations in 42 GHz gyrotron beam tunnel |
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| Authors: | N Kumar U Singh T P Singh A K Sinha |
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| Affiliation: | 1. Gyrotron Laboratory, Microwave Tube Area , Central Electronics Engineering Research Institute (CEERI) (a constituent laboratory of Council of Scientific and Industrial Research, CSIR) , Pilani, Rajasthan, 333 031, India;2. Department of Physics , JV College , Baraut, UP, 250 611, India nitin_physika@rediffmail.com;4. Gyrotron Laboratory, Microwave Tube Area , Central Electronics Engineering Research Institute (CEERI) (a constituent laboratory of Council of Scientific and Industrial Research, CSIR) , Pilani, Rajasthan, 333 031, India;5. Department of Physics , JV College , Baraut, UP, 250 611, India |
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| Abstract: | Parasitic oscillation excitation analysis has been carried out for the 42 GHz gyrotron beam tunnel. This article presents a systematic approach for the analysis of parasitic oscillation excitation. The electron trajectory code EGUN has been used for the estimation of the electron beam parameters in the beam tunnel. The electromagnetic simulation code CST-MS has been used for the eigenmode and Q value analysis. The analysis of the parasitic oscillations has been performed for the symmetric TE modes and the first three cavity side copper rings. Four different approaches- the Q value study, the mode maxima-electron beam radius mismatching, the electron cyclotron frequency-mode excitation frequency mismatching and the backward wave interaction analysis- have been used for the parasitic oscillation analysis. |
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| Keywords: | beam tunnel parasitic oscillation gyrotron lossy ceramics |
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