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LHC MSI and MSD control

LHC MSI and MSD control. MSI presently on mugefs strong suspect for orbit variations seen in 2008 to be powered in DC for 2009, on mugefs, with “manual” ramp down to zero current after injection keeps current value interlocking in front end not operationally an attractive long-term prospect

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LHC MSI and MSD control

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  1. LHC MSI and MSD control • MSI presently on mugefs • strong suspect for orbit variations seen in 2008 • to be powered in DC for 2009, on mugefs, with “manual” ramp down to zero current after injection • keeps current value interlocking in front end • not operationally an attractive long-term prospect • MSD presently on FGCs • No current (function) interlock at power convertor level • MSDs have DCCT providing reference to LBDS BETS, which continually checks against “beam energy” from 2 MB circuits. • Proposal for discussion • Move MSI to FGC control, and: • either add current (function) interlocking to FGCs - other families already surveyed by SW interlocks so of more general use (HW update for Steve). • or add the MSI current (1 value) into the injection BETS (HW update for Etienne).

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