External Panel for Review of the Enhanced Quench Protection System The external enhanced QPS review panel is one of two panels set up by the CERN management. The other, the “risk” review is to examine the risks to future operation of the LHC, taking into account the implementation of the technical and operational measures foreseen and being implemented following the incident of 19th September 2008. Following an understanding of the behavior of the QPS system on 19th September, the mandate of the review panel is to: Review in terms of completeness, the functional specifications of the proposed new system, in particular, the strategy for the proposed new scheme to detect (and protect against) abnormally high resistance “splices” and the detection of a symmetric quench. Review and analyze the technical details of the proposed implementation of the new enhanced Quench Detection and Protection system paying particular attention to the critical nature of the system with respect to LHC operation. Examine all operational issues associated with the new system in particular the two extremes of failing to trigger when necessary and spuriously triggering unnecessarily and thereby causing down time of the LHC. Review the planning schedule foreseen for the completion of the new Enhanced QPS system and define priorities (high resistance splice detection vs symmetric quench). Review the robustness of the new system which should operate reliably during many years in a hostile environment (including radiation) of the LHC tunnel. Members: Reinhard Bacher, DESY George Ganetis, BNL Howard Pfeffer, FNAL Dan Stout, ITER Jim Strait, FNAL Jay Theilacker (Chair), FNAL For your information : LHC Performance Workshop Chamonix 2009

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LHC QPS Review Committee

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