CERN Accelerating science

Report number LHC-PROJECT-Report-1169 ; CERN-LHC-PROJECT-Report-1169
Title The Control System for the Cryogenics in the LHC Tunnel
Author(s) Gomes, P (CERN) ; Anastasopoulos, K (Natl. Tech. U., Athens) ; Antoniotti, F (CERN) ; Avramidou, R (Natl. Tech. U., Athens) ; Balle, Ch (CERN) ; Blanco-Viñuela, E (CERN) ; Carminati, Ch (CERN) ; Casas-Cubillos, J (CERN) ; Ciechanowski, M (AGH-UST, Cracow) ; Dragoneas, A (Natl. Tech. U., Athens) ; Dubert, P (AGH-UST, Cracow) ; Fampris, X (Natl. Tech. U., Athens) ; Fluder, C (AGH-UST, Cracow) ; Fortescue, E (CERN) ; Gaj, W (AGH-UST, Cracow) ; Gousiou, E (Natl. Tech. U., Athens) ; Jeanmonod, N (CERN) ; Jodłowski, P (AGH-UST, Cracow) ; Karagiannis, F (Natl. Tech. U., Athens) ; Klisch, M (AGH-UST, Cracow) ; López, A (CERN) ; Macuda, P (AGH-UST, Cracow) ; Malinowski, P (AGH-UST, Cracow) ; Molina, E (Madrid, CIEMAT) ; Paiva, S (CERN) ; Patsouli, A (Natl. Tech. U., Athens) ; Penacoba, G (CERN) ; Sosin, M (AGH-UST, Cracow) ; Soubiran, M (CERN) ; Suraci, A (CERN) ; Tovar, A (CERN) ; Vauthier, N (CERN) ; Wolak, T (AGH-UST, Cracow) ; Zwalinski, L (AGH-UST, Cracow)
Imprint 21 Jul 2008. - 7 p.
In: 22nd International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2008, Seoul, Republic of Korea, 21 - 25 Jul 2008, pp.45-50
Subject category Accelerators and Storage Rings
Accelerator/Facility, Experiment CERN LHC
Abstract The Large Hadron Collider makes extensive use of superconductors, in magnets for bending and focusing the particles, and in RF cavities for accelerating them, which are operated at 1.9 K and 4.5 K. The process automation for the cryogenic distribution around the accelerator circumference is based on 16 Programmable Logic Controllers, each running 250 control loops, 500 alarms and interlocks, and a phase sequencer. Spread along 27 km and under ionizing radiation, 15 000 cryogenic sensors and actuators are accessed through industrial field networks. We describe the main hardware and software components of the control system, their deployment and commissioning, together with the project organization, challenges faced, and solutions found.

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