Beam Current and Position Monitor for the Astron Accelerator

Abstract

A beam current and position monitoring system very similar to one developed for the Berkeley ERA accelerator has been developed for use on the Astron accelerator. Beam current measurements are accurate to less than 2%. At beam currents above 500 A beam displacements less than 1 mm off‐axis can be observed. The beam current and position at any two of 30 locations in the accelerator and transport section can be simultaneously monitored on either of two oscillograph systems. The current sensors do not interfere with the beam propagation and are outside the vacuum system for easy maintenance and calibration.