Experience with the Multi-Year Implementation of an Industrial Control System

In 1990, CERN passed a multi-year purchasing and installation contract for the LEP 200 Cryogenics control system with ABB, one of the world's leading suppliers of integrated Distributed Control Systems (DCS). A financial framework provided over a period of eight years the required supplies. These were called up with so called "Release Orders", taking into account the latest technical developments. The issues and experiences with such a new approach and the resulting control system are described

The orbit measurement system of the CERN 800 MeV PS booster

The beam position measurement system has been designed to satisfy a large number of requirements: observation of beam trajectory, reduction of coherent oscillations; Q measurement, and closed orbit measurement; (all at injection): and accelerated beam position. The special four superposed rings configuration of the booster and the value of Q(4<Q<5) leads to a minimum of 16*4 ring position sensors to satisfy those requirements. (9 refs)