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The design of a W-band second harmonic gyrotron based on a 1.8 T continuous operation solenoid is presented. A compact triode MIG is designed to generate gyrating electron beam. The gyrotron operates at the TE0,2 mode with a conventional cylindrical cavity. And we designed a high efficiency quasi-optical mode converter with a dimpled wall laucher, the mode conversion efficiency is 97% and the Gaussian...
The design of a W-band gyrotron operating at the third harmonic cyclotron frequency is presented. In order to tackle the mode competition problem, a cylindrical cavity with an iris structure is used. The gyrotron is designed to operate at the low loss, circular symmetric TE02 mode. When the gyrotron is driven by a 45 kV, 4 A electron beam with orbital-to-axial velocity ratio equal to 1.5, an output...
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...
The design of double anodes magnetron injection gun (MIG) for 3 mm gyrotron is described in the paper. Based on the beam-wave interaction parameters in the gyrotron cavity, some structure parameters of the MIG are primarily designed by theory calculation. The simulation calculation using PIC code is done to verify the structure design of the MIG and to obtain some physical parameters of the electron...
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