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It is desirable to increase the RF power per gyrotron tube for plasma heating in future fusion devices. The realization of gyrotrons with highest possible output power will reduce their overall number and superconducting magnets required for future fusion reactors. In this work the feasibility of a 4 MW 170 GHz coaxial-cavity gyrotron is investigated. A mode selection procedure is presented and proper...
At the Forschungszentrum Karlsruhe (FZK), the feasibility of a 4 MW 170 GHz gyrotron is currently under investigation. The project aims inter alia at increasing the output power of coaxial gyrotrons to their technical and physical limits. For this purpose, a design of a triode type electron gun is presented which has been optimized to meet the required specifications for the operating mode of a 4...
In this work the feasibility of a 4 MW 170 GHz gyrotron resonator design is investigated. The realization of high power gyrotrons will reduce the number of gyrotrons and superconducting magnets required for future fusion reactors. Proper care has been taken in examination of mode competition in the case of very high order modes. A possible outer wall corrugation is discussed and possible improvements...
The proper choice of numerical parameters in mode competition calculations for gyrotron cavities, like time step size, azimuthal phase discretisation and selection of included modes, is discussed. As a first step, simple rules are derived and justified.
Summary form only given. Recently, gyrotron-based spectrometers suitable for nuclear magnetic resonance (NMR) studies have been constructed to study dynamic nuclear polarization which can result in significant enhancement of the NMR signal. In the present paper multimode calculations of a low-power (above 10W) high-frequency (200 GHz -300 GHz) gyrotron for NMR spectroscopy applications have been performed...
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