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Reliability Sub-Working Group

This proposal outlines strategies to improve the reliability of false dump generation systems within the LHC framework. Focusing on key components such as BLMS, BIS, LBDS, and cryogenics, it highlights the importance of mitigating magnet protection failures and minimizing loss duration to ensure safe operations. The report presents average MTBF metrics for various systems and discusses alternative configurations to enhance system performance. Aiming for better average loss rates across multiple beam permit systems, the proposed work emphasizes the need for ongoing reliability assessments and innovative solutions.

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Reliability Sub-Working Group

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  1. Reliability Sub-Working Group False Dumps generation RSWG G.Guaglio

  2. LHC main systems BLMS BIS LBDS BEM DCCT Cryogenics Lifetime Resistive magnets Access Power converters Timing Vacuum Experiments QPS Collimation RF BPM False dump generator ? ? >10s Magnet protection Loss Duration middle <10ms 4-5 first line systems: average l < 1E-7/h/4 = 2E-8/h ~20 beam permit systems: average l < 1E-6/h/20 = 5E-8/h RSWG G.Guaglio

  3. Annual False Dumps Work proposal RSWG G.Guaglio

  4. BLMS UPS situation • 68 in the straight sections: MTBF 1E5? (3) • 1080 in the arc: MTBF 1E9 h @25°C (0.004) • 24 in surface VME : MTBF 60,000 h @25°C (2) Possibility to use non LHC standard VME rack configuration to improve the reliability: disable/check fans interlock, parallel configuration,… RSWG G.Guaglio

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