Inverse Magnetron Injection Gun for 170GHz Gyrotron
2020
A key part of the research on the gyrotron is the research and design of the electron gun. As the source of the gyrotron, the electron gun converts the electrical energy of the power source into the kinetic energy of the electronic movement, and provides a stable electron beam for the gyrotron. The quality of the electron beam will directly affect the performance of the entire gyrotron. The effect of tube energy conversion, which determines the overall performance of the gyrotron. According to the operating parameters of the 170GHz electron gun, an inverse magnetron injection gun (IMIG) is designed in this paper. Under the condition that the acceleration voltage of the electron beam is 75KV and the current of the electron beam is 45A, it is obtained that the center radius of the electron beam guide is about 7.6mm, and the lateral-vertical speed ratio is 1.3. The transverse velocity dispersion is 3.6% and the longitudinal velocity dispersion is 5.6%, which meets the requirements of beam-wave interaction.
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