Particularities of reversible magnetic focusing system development for multi-beams klystrons

The problems of designing reversible magnetic focusing systems of multi-beam klystrons are considered. The possible constructive decisions of magnetic systems are presented. Here are discussed the approaches to designing MRFS, techniques of magnetization and setting of the magnets, reducing the radial component of the magnetic induction on the axis of the working channels, materials selection of permanent magnets. The examples of magnetic systems and simulation results are presented.