Apparatus for monitoring the acceleration energy of an electron accelerator

摘要

The apparatus contains a target exposed to a beam of accelerated electrons and an electron absorber positioned behind the target. The acceleration energy of the electron accelerator is monitored by monitoring the travelling range of the electrons in the absorber. For this purpose the electron absorber is made up of several insulated absorber portions which are arranged one behind another. Each of these portions is electrically connected to a separate input of a processing system. The monitoring apparatus is especially well suited for application in electron accelerators in medical radiation therapy, such as linear accelerators.