Study on Structural Optimization for Improving High-Voltage Insulation Performance in Electron Gun
The insulation performance of ceramics in electron guns is one of the important factors restricting the development of klystron towards high-power direction,and the occurrence of surface flashover of ceramics is the key factor affecting its insulation performance.Based on the mechanism of ceramic surface flashover,a novel insulation structure that utilizes multiple sets of shielding ring structures is proposed to control the electric field strength at the junction of vacuum,ceramic,and metal,and to shield the bombardment of insulating ceramics by electrons emitted from the support rod of the cathode.The simulation results show that the proposed structure can signifi-cantly reduce the electric field strength at the triple junction,reaching below 2.5 MV/m.The corresponding structural optimization method can help improve the operating voltage of the klystron and can be applied to other electric vacuum devices.
insulation performancesurface flashovertriple junctioncorona ringshielding ring
万方数据
维普
