A tool for model based diagnostics of the AGS booster

A model‐based algorithmic tool was developed to search for lattice errors by a systematic analysis of orbit data in the AGS Booster synchrotron. The algorithm employs transfer matrices calculated with MAD between points in the ring. Iterative model fitting of the data allows one to find and eventually correct magnet displacements and angles or field errors.The tool, implemented on a HP‐Apollo workstation system, has proved very general and of immediate physical interpretation.