The Characteristics of the Synchrotron Beam

Abstract

Measurements were made on the characteristics of the synchrotron electron beam at the time of the target irradiation. The orbit of the beam expanded from its synchronous accelerating orbit and irradiated individually a variety of copper targets. There were two sets of measurements. In the first the bremsstrahlung beam intensity was measured. From these data the average number of beam traversals of each target was calculated. In the second set the target was removed from the vacuum system after a bombardment and cut into sections. The induced radioactivity of the individual pieces was measured. Information was obtained on the radial penetration of the target and the radial and vertical oscillations of the beam both before and after the target irradiation. The width of the synchrotron beam was 0.1 inch vertically and 0.14 inch radially. The radial penetration of the target by the primary beam decreased almost exponentially with the intensity dropping by a factor of 2 in about 0.0025 inch.