MODEL BASED ORBIT CORRECTION IN A DIAGNOSTICS DEFICIENT REGION

Abstract

An orbit correction method is presented for a region where the number of beam position monitors is much less than the number of possible trajectory distortions points (quads). The method was developed for the Coupled Cavities Linac (CCL) part of the Spallation Neutron Source (SNS) linac. The orbit correction is very important in this region to minimize losses and activation, but a traditional orbit correction did not work here. The new method based on a realistic online model was developed. The procedure of a model parameters finding and results are discussed