Abstract
An investigation was undertaken to develop a technique for measuring the electron beam size for acceptance tests on the Oak Ridge Electron Linear Accelerator (ORELA). Of several methods considered a foil activation technique is believed to be sufficiently accurate, and yet uncomplicated. Considerations leading to a choice of foil material and thickness are presented. Copper and nickel foils activated in the Rensselaer Polytechnic Institute electron linac were sectioned, and the measured activities of the various sections were used to determine the radial profile of the electron beam. Theoretical calculations of the foil activities agreed well enough with the experimental results so as to be useful for estimating the expected activity.
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