System for Guiding a Relativistic High-Current Electron Beam

For the purpose of guiding a 400-ampere, 4-MeV electron beam through the Astron accelerator, a combination of several kinds of focusing and steering coils are used in conjunction with current-regulated power supplies. The present guiding system - accelerator layout, along with design and control features of the guiding elements, is given in the first section. Following this is a discussion of how system components affect the accelerated electron beam. Finally, conclusions from design and operating experience are drawn.