Radiation by Electrons in Large Orbits

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Abstract
By finding the points in the synchrotron magnetic cycle at which the time rate of change of electron orbit radius vanishes, the total electron energy loss per orbit revolution is measured. The results, for electron energies from 205 Mev to 280 Mev, are in excellent agreement with classical electromagnetic theory. The measurements have been extended to 318 Mev with reduced precision by observing orbit shrink rates after the radiofrequency accelerating voltage is removed. No coherent energy losses and no significant energy losses other than radiation have been observed.