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In this paper, we present the RF behavior of conventional cylindrical interaction cavity for 240 GHz, 1 MW gyrotron for futuristic plasma fusion reactors. Very high-order TE mode is searched for this gyrotron to minimize the Ohmic wall loading at the interaction cavity. The mode selection process is carried out rigorously to analyze the mode competition and design feasibility. The cold cavity analysis and beam-wave interaction computation are carried out to finalize the cavity design. The detail parametric analyses for interaction cavity are performed in terms of mode stability, interaction efficiency and frequency. In addition, the design of triode type magnetron injection gun is also discussed. The electron beam parameters such as velocity ratio and velocity spread are optimized as per the requirement at interaction cavity. The design studies presented here confirm the realization of CW, 1 MW power at 240 GHz frequency at TE mode. [ABSTRACT FROM AUTHOR]

The article presents a study which designed a triode-type magnetron injection gun of a 42-gigahert, 200-kilowatt gyrotron for an Indian TOKAMAK system by applying the code EGUN. The gyrotron is an instrument that can produce high powers at very high frequencies. The estimations are carried out to calculate the parameters connected to the cathode, the magnetic field, and the modulating anode voltage. The study is accomplished with the validation of the design by utilizing another code TRAK.

In this paper, a synthesized design of the magnetron injection gun (MIG) for a 200 kW, 42 GHz gyrotron is presented. The synthesis steps involve the selection of the type of the MIG, the development of the design criteria, the selection of initial design parameters and the development of a program for the estimation of the synthesized parameters for the MIG design. The presented approach estimates the cathode, the beam and the anode parameters, enabling one to build a synthesis model of a complete MIG system. [ABSTRACT FROM AUTHOR]