A method to accelerate the design of sheet beam traveling wave tube depressed collector

An efficient collector is one of the key factors in improving the overall efficiency of a sheet beam traveling wave tube(SB-TWT). In this paper, K-means algorithm is used to process the massive data of sheet electron beam (EB) after beam-wave interaction, so that a more representative and smaller amount of data is obtained. These data will be imported into the CST Tracking module for the quickly simulation design of the collector. The designed two-stage depressed collector is applied to a 6 kW continuous wave Ku-band SB-TWT with 26 kV Voltage and 1.3 A current. The collector efficiency is up to 80.79% with a backflow current of 0.13%. The overall efficiency of SB-TWT reaches about 52.9%.