COMPUTATIONAL BEAM DYNAMICS STUDIES OF COLLECTIVE INSTABILITIES OBSERVED IN SNS

Abstract

During the commissioning and early operation of the Spallation Neutron Source, some physics shifts were set aside for high intensity stability studies. Under certain, especially contrived conditions, a number of beam instabilities were induced. These included both electron cloud and ring impedance driven phenomena. We are now applying both simple analytic models and the ORBIT Code to the description and simulation of these observed instabilities.