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Reliability of Beam Loss Monitors System for the Large Hadron Collider

Abstract : The employment of superconducting magnets, in the high energies colliders, opens challenging failure scenarios and brings new criticalities for the whole system protection. For the LHC beam loss protection system, the failure rate and the availability requirements have been evaluated using the Safety Integrity Level (SIL) approach. A downtime cost evaluation is used as input for the SIL approach. The most critical systems, which contribute to the final SIL value, are the dump system, the interlock system, the beam loss monitors system and the energy monitor system. The Beam Loss Monitors System (BLMS) is critical for short and intense particles losses, while at medium and higher loss time it is assisted by other systems, such as the quench protection system and the cryogenic system. For BLMS, hardware and software have been evaluated in detail. The reliability input figures have been collected using historical data from the SPS, using temperature and radiation damage experimental data as well as using standard databases. All the data has been processed by a reliability software (Isograph). The analysis ranges from the components data to the system configuration.
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http://hal.in2p3.fr/in2p3-00025196
Contributor : Jeanine Pellet <>
Submitted on : Monday, December 12, 2005 - 2:43:02 PM
Last modification on : Thursday, January 11, 2018 - 6:14:00 AM
Long-term archiving on: : Tuesday, September 7, 2010 - 5:37:25 PM

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G. Guaglio, B. Dehning, C. Santoni. Reliability of Beam Loss Monitors System for the Large Hadron Collider. 11th Beam Instrumentation Workshop (BIW 04), May 2004, Knoxville, United States. pp.141-149, ⟨10.1063/1.1831141⟩. ⟨in2p3-00025196⟩

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