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Instrumentation, Field Network and Process Automation for the Cryogenic System of the LHC Test String

A. Suraci·T. Bager·Ch. Balle·E. Blanco·J. Casas·P. Gomes·S. Pelletier·L. Serio·N. Vauthier
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Abstract

CERN is now setting up String 2, a full-size prototype of a regular cell of the LHC arc. It is composed of two quadrupole, six dipole magnets, and a separate cryogenic distribution line (QRL) for the supply and recovery of the cryogen. An electrical feed box (DFB), with up to 38 High Temperature Superconducting (HTS) leads, powers the magnets. About 700 sensors and actuators are distributed along four Profibus DP and two Profibus PA field buses. The process automation is handled by two controllers, running 126 Closed Control Loops (CCL). This paper describes the cryogenic control system, associated instrumentation, and their commissioning.

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A. Suraci, T. Bager, Ch. Balle, E. Blanco, J. Casas, P. Gomes, S. Pelletier, L. Serio, N. Vauthier. 2001-12-12. Instrumentation, Field Network and Process Automation for the Cryogenic System of the LHC Test String. https://arxiv.org/abs/physics/0112030

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