Calculated Beam-Loading Effects in the NAL Main-Ring RF System

The synchronous transfer of beam from the booster into the NAL main ring results in a partial turn of beam circulating in the main ring. This situation presents large step changes in beam-loading to the main-ring RF system which must be handled by the cavity-regulation loops. The behavior of the main-ring RF system under these conditions has been studied with the aid of the IBM S/360 Continuous System Modeling Program (CSMP). The CSMP provides an analysis of system behavior starting from a system block diagram and a description of the driving functions. This paper describes the RE system under study and the response predicted by the program to a variety of beam-loading conditions.