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Gyrokinetics of Coaxial-Cavity Electron Cyclotron Maser |
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| Authors: | Shi-Chang Zhang and Manfred Thumm |
| Institution: | (1) Department of Applied Physics, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China;(2) Institut für Technische Physik, Forschungszentrum Karlsruhe, Postfach 3640, Karlsruhe, Germany, and;(3) Institut für Höchstfrequenztechnik und Elektronik, Universität Karlsruhe, Kaiserstr. 12, D-76128 Karlsruhe, Germany |
| Abstract: | Based on the gyrokinetics of free-electron masers, the energy-transfer rate and starting current are derived for a coaxial-cavity electron cyclotron maser (gyrotron oscillator) with the misalignment of the inner-rod axis to the outer-cavity axis taken into account. The effect of the finite cavity length is included in the derivation. The stable term of the instability which results from the contribution of the guiding-center distribution is of significance, although it is usually neglected in a cylindrical-cavity gyrotron. It is found that the structure misalignment has more serious influence on the performance of the coaxial cavity gyrotron than the beam misalignment. |
| Keywords: | electron cyclotron maser gyrotron oscillator gyrokinetics coaxial cavity structure misalignment |
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