Database for Accelerator Optics

The A utom ated B eam Steering and Shaping (A B S) project aim s to provide an autom atic, generic and reliable softw are system to ensure the provision of high quality particle beam s to users of an accelerator com plex. A n im portant com ponent of this project is the access to validated reference data describing the different com ponents instaled in the m achines, such as m onitors as w el as the optical and m agnetic properties of al m agnets. These properties are dependent on the type of particle, on the energy and on the destination of the beam . The data m odel m ust therefore be able to represent several particle beam s along different trajectories through the sam e elem ent. Furtherm ore, the database design m ust be sufficiently general to alow the description of the elem ents from a sim ple dipole to com plex m ulti-coil m agnets. For a given operation, the sequence of optics elem ents w ith the param eters appropriate to the type of beam m ust be extracted, suitably form ated and passed as input to a beam optics program . This paper describes the problem s encountered during the analysis, the resulting data schem a and the softw are developed for data m aintenance. Exam ples are given for the m achines of the C E R N PS com plex.