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- S. Blanchard, F. Antoniotti, F. Bellorini, J-P. Boivin, J. Gama, P. Gomes, H.F. Pereira, G. Pigny, B. Rio, H. Vestergard
CERN, Geneva, Switzerland
- L. Kopylov, S. Merker, M.S. Mikheev
IHEP, Moscow Region, Russia
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In CERN accelerators, high vacuum is needed in the beam pipes and for thermal isolation of cryogenic equipment. The first element in the chain of vacuum production is the pumping group. It is composed of a primary pump, a turbo-molecular pump and a few isolation and intermediate valves; as optional devices we can also find: vacuum gauges, venting valves and leak detection valves. At CERN accelerators, the pumping groups controllers may be found in several hardware configurations, depending on the environment and on the vacuum system used; all of them are based on PLCs and communicate over a field bus; they are controlled by the same flexible and portable software. They are remotely accessed through a SCADA application and can be locally controlled by the same mobile touch-panel. More than 250 pumping groups are permanently installed in the Large Hardron Collider, Linacs or North Area Experiments.
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