BEHAVIOR OF THE BPM SYSTEM DURING THE FIRST WEEKS OF SOLEIL COMMISSIONING

SOLEIL, a new synchrotron light source built near Paris in France, is pioneering a new high resolution electron Beam Position Monitor (BPM) system in order to achieve beam stability at the micron level. The same BPM system can also measure the turn-by-turn beam position for various machine physics studies. It combines the high stability characteristics of multiplexed input channels and the flexibility of a digital system. Instrumentation Technologies developed a chassis called "Libera electron" upon SOLEIL proposals and requirements. The first weeks of the Storage Ring commissioning have been very successful thanks in large part to the BPM system that was operational from the first day. The system is being progressively evaluated and debugged. Although not all requirements are yet fulfilled, we are confident that it will operate at full performance after the necessary improvements are implemented by SOLEIL and by Instrumentation Technologies.