Fast Optimization Design Method of Periodic Permanent Magnet Focusing System for TWT

This paper proposes a fast optimization design method for the traveling wave tube (TWT) periodic permanent magnet focusing (PPM) system. Based on the target system value distribution using MTSS software, a magnetic system that satisfies the requirements is quickly designed, and the accurate single-loop value of each magnetic steel is obtained. The actual magnetic system processed according to the single-loop value is more in line with the design requirements, which is conducive to the assembly and commissioning of higher frequency millimeter wave and terahertz electric vacuum devices.