INFLUENCE OF MAGNETIC FIELD INHOMOGENEITY ON OPERATION OF THE THz GYROTRON WITH A PULSE MAGNET |
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| Authors: | O. Dumbrajs La Agusu T. Idehara |
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| Affiliation: | (1) Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui-shi 910-8507, Japan;(2) Helsinki University of Technology, Association Euratom-TEKES, PO Box 2200, FIN-02015 HUT, Finland;(3) Institute of Solid State Physics, Association Euratom-University of Latvia, Kengaraga Street 8, LV-1063 Riga, Latvia;(4) Department of Physics, Haluoleo University, Faculty of Mathematics and Sciences, Kendari, Indonesia |
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| Abstract: | Influence of magnetic field tapering on operation of a gyrotron working in the TE 4,12 mode at the second harmonic frequency 1013.67 GHz is investigated. It is found that the existing inhomogeneity of the magnetic field of the order of 0.25%–0.50% in the cavity allows one to achieve higher efficiencies. It improves also mode competition scenario by suppressing oscillations of the two parasitic TE 3,6+ and TE 5,5− modes at the fundamental frequencies 513.35 GHz and 503.64 GHz, respectively. |
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