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LHC Status Tues day Morning 20 -Nov Bernhard Holzer, Mike Lamont

LHC Status Tues day Morning 20 -Nov Bernhard Holzer, Mike Lamont. . .. stable beam since 05:40h 12:00h A78B2 and ROF.A78B2 tripped FAULT OFF 14: 00h Beam dump by Operation 15 :00h access for wire scanner repair CMS et al Wire Scanner Situation: LHC.BWS.5R4. B1V1

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LHC Status Tues day Morning 20 -Nov Bernhard Holzer, Mike Lamont

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  1. LHC StatusTuesday Morning 20-Nov Bernhard Holzer, Mike Lamont • ... stable beam since 05:40h • 12:00h A78B2 and ROF.A78B2 tripped FAULT OFF • 14:00h Beam dump by Operation • 15:00h access forwire scanner repair • CMS et al • Wire Scanner Situation: • LHC.BWS.5R4.B1V1 • LHC.BWS.5L4.B2H2  (this device has already seen many scans!) • No Scanner for B1H available • LHC.BWS.5L4.B2V1 09:00h 12:00h bunch length distribution LHC 8:30 meeting

  2. Monday Afternoon 17:50h BETS for LBDS-B2 is not OK communication error between the interlock BEM (sector 56 & 67) and the master PLC at the beginning of the pre-cycling -> access needed 19:00h collimator settings in the transfer line settings did not track Q26 -> Q20 transition new settings calculated new knobs calculated to scan TL aperture validation of both TLs( Chiara !!!) 23:30h RSS.A56.B2: QPS not OK power cycle helps

  3. Monday Night Plan: VdM Scans Hypercycle: The hypercycle is 4TeV_10Aps_0.6m_VdM. BPs & settings: Ramp settings:RAMP_4TeV_2012_V1_MD3_EMIT Collision BP isPHYSICS-VDM-SQUEEZE-2012_V1 no squeeze, collisions are with injection beta* X-angles: ATLAS & CMS : 0, ALICE : +145 (standard), LHCb: -220 (standard Hor). FirstFill: 3 bunches / beam (collisions in all IPs, 9E11 max (relaxed SBF). Inject, ramp, collide, optimize, align TCTs, loss map, asynch dump test. SecondFill: 3 bunches / beam (collisions in all IPs, 9E11 max, Test with final collimator functions and all lumi scan corrections. In collisionsome tests with offset scan to ensure that beam is stable enough. At the end loss map or asynch dump test ... Third Fill will be used for the VdMs. proposed filling scheme for the VdM scan is:  Multi_39b_30_1_6_4bpi13inj

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