Abstract
This paper describes the design of a step tunable, cyclotron harmonic gyrotron operating in the submillimeter wave range (maximum frequency is about 600 GHz), which is suitable for plasma diagnostics and far infrared spectroscopies. The numerical simulations are performed for several cavity modes. The dimension of cavity is optimized at the second harmonic operation of TE261 mode, operating at an output power and a frequency of 1 kW and 384 GHz, respectively. The beam voltage Vk=40kV and the beam current Ib=0.6A, so we can have fairly high efficiency of 4.1% for the second harmonic operation.
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