Müller, R.; Franksen, B.; Görgen, R.; Lange, R.; Kuske, P.; Müller, I.; Rahn, J.; Schneegans, T.: Installing a Fast Orbit Feedback at BESSY. In: Proceedings IPAC 10. First International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May, 2010, 2010. - ISBN 978-92-9083-352-9, p. 2749-2751
http://accelconf.web.cern.ch/AccelConf/IPAC10/papers/wepeb030.pdf
Abstract:
In view of increased processing bandwidth at demanding experiments and the need for rapid compensation of noise spikes and new, yet unknown excitations, a fast orbit feedback aiming at noise suppression in the 1Hz-50Hz range has become mandatory for the 3rd generation light source BESSY II. The fast set point transmission plus the replacement of all corrector power supplies is scheduled as a first step. Later – in combination with top-up operation – orbit stability can be further improved by replacing today’s multiplexed analog beam position monitors by state-of-the-art fast digital units. This paper describes how the pilot installation of a small subset of fast corrector power supplies allows to tune performance and study the benefits for today’s most sensitive experiments.