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This paper described the 3D simulation method and results of electron gun and beam transport for the 0.14THz TWT with the help of CST. The hot test results show that the design of the electron beam optics system satisfied the need of the TWT. It bases the manufacture of the 0.14THz travelling wave tube.
A gyrotron was constructed with an inside quasi-optical system to convert the wave into gaussian beam. The experiments showed an output power of 23.9kW while the frequency was 95.1GHz, which was in accordance with the design. The threshold current and the output power under different parameters were measured, which showed some discrepancies at parts of the charts between the calculations and the experiments,...
The Cusp electronic gun for Ka band Gyro-TWT is simulated by the 3D PIC software, in which the electronic 3D velocity value is extracted to calculate the velocity ratio of the transverse velocity and longitudinal velocity. The Cusp gun is designed and optimized in 98kV voltage and 1A current, to obtain 1.1 velocity ratio and 2.4% velocity spread. The design is adopt for the three folded helical corrugated...
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