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In this paper, the design of a magnetron injection gun (MIG) with a single-anode built for W-band gyrotron oscillator is presented. The simulation of the MIG is finished with the help of a trajectory program EGUN. The simulation results indicate that the velocity ratio with velocity spread of less than 4% is 1.41.
In this paper, the design and experiment of the conventional electron beam spreading system for W-band gyrotron oscillator collector is presented. The conventional spread system consists of a magnetic shade and two pairs of coils. The particle-in-cell (PIC) simulation of the collector under the conventional spreading system has been finished. The power density distribution of the electron beam on...
A W-band four-cavity gyroklystron amplifier has been studied using the particle-in-cell (PIC) code. The amplifier operates in the fundamental harmonic TE01 circular electric mode. The simulation predicts 143kw output power at W-band with 33.8% efficiency, 37dB gain and 1GHz bandwidth.
In this paper, the design of the conventional electron beam spreading system of the gyrotron collector consisted of the magnetic shade and two pairs of coils is presented. The simulation and experiment of the electron beam distribution on the collector wall of the gyrotron applied to the electron spreading system is completed.
This paper presents the development of a fundamental harmonic TE01 mode W-band gyrotron backward-wave oscillator (Gyro-BWO). The MIG employs a triode configuration to generate a helical electron beam with the current of 1.5 A, the voltage of 30 kV, and a pitch factor of 1.0. A mode-converter free reflective cavity is employed. Simulation reveals that the TE01 mode reflective cavity is capable of generating...
A quasi-optical mode converter for a TE02 mode gyrotron is designed. The mode converter consists of a launcher, an elliptical reflector and a parabolic reflector. Based on the vector diffraction theory, the mode converter is ananlyzed by using using numerical calculation and three-dimensional electromagnetic code. The simulation results show that the good Gaussian mode is converted from the circular...
A coherent microwave and millimeter wave generation from fast-wave gyro-devices are attractive due to their high power handing capability. They have many applications such as plasma generation and heating, high gradient particle accelerators, and material processing. In the fast-wave gyro-devices, since the beam-wave interaction takes place between a transverse electric field of a guided wave and...
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