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Linear and Non-Linear Inserts for Genuinely Wideband Continuous Frequency Tunable Coaxial Gyrotron Cavities |
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| Authors: | Zisis C Ioannidis Olgierd Dumbrajs and Ioannis G Tigelis |
| Institution: | (1) Department of Electronics, Computing, Telecommunications and Control, Faculty of Physics, National and Kapoditrian University of Athens, Building V, Panepistimiopolis, Zografou, 15784 Athens, Greece;(2) Department of Engineering, Physics and Mathematics, Helsinki University of Technology, Euratom-TEKES Association, 02015 Helsinki, Finland;(3) Institute of Solid State Physics, University of Latvia, Riga, LV-1063, Latvia |
| Abstract: | We consider two continuous frequency tunable CW coaxial gyrotron oscillators, one 330 GHz with 3 GHz bandwidth and output power 50 – 400 W for scientific applications and one 30 GHz with 0.4 GHz bandwidth and output power 40 – 140 kW for industrial applications. The continuous tuning of both gyrotrons is achieved by moving the linearly tapered inner conductor in the axial direction in combination with the proper adjustment of the operating magnetic field. We consider also a non-linear tapering, which makes it possible to reduce the length of the insert and to improve efficiency of the device. |
| Keywords: | Coaxial resonators Gyrotrons Frequency tuning |
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