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Tuesday 11 th September

Tuesday 11 th September. Vacuum intervention Point 4 following leak wire scanner beam1 Bake-out of pumping group during the day Removal of wire scanner early evening Pumping over-night, opening of valves early morning VIP visit IP2

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Tuesday 11 th September

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  1. Tuesday 11thSeptember • Vacuum intervention Point 4 following leak wire scanner beam1 • Bake-out of pumping group during the day • Removal of wire scanner early evening • Pumping over-night, opening of valves early morning • VIP visit IP2 • Test of different beam modes and state machines for experiments • Access: • ATLAS, LHCb • RD1.LR5 for quench MD preparation • Removal of bake-out jackets two MKI tanks IP2 • LBDS pulsing in local • BI for head-tail monitor • RF investigations of SPS re-phasing FESA class problems with (p, Pb) • TI8 extraction tests for MKE stability tests with INDIV beam • LHCb dipole presently fault off LHC 8:30 meeting

  2. Wire Scanner – Bernd Dehning & BI team LHC.BWS.5L4.B2H1:NB_PTS_SCAN_IN----3768LHC.BWS.5L4.B2H2:NB_PTS_SCAN_IN----8124LHC.BWS.5L4.B2V1:NB_PTS_SCAN_IN----3541LHC.BWS.5L4.B2V2:NB_PTS_SCAN_IN----6690LHC.BWS.5R4.B1H1:NB_PTS_SCAN_IN-----781LHC.BWS.5R4.B1H2:NB_PTS_SCAN_IN---10247LHC.BWS.5R4.B1V1:NB_PTS_SCAN_IN-----651LHC.BWS.5R4.B1V2:NB_PTS_SCAN_IN----9468  • the scanner is dismounted and a closing flange is mounted • the wire has been recuperated for analysis • the resistivity of all b1 scanners have been measured before and after the opening of the vacuum, integrity check • the number of the scans of all LHC scanners see below • the broken scanner has had 10000 • we are intending to switch all scanners tomorrow morning to the spare scanner, which are less often used • the scanner mechanics is in the radioactive equipment storage to be released by RP LHC 8:30 meeting

  3. Vacuum status LHC 8:30 meeting

  4. The Plan • Wednesday, today • 08:30 Vac back in to Point 4 for final checks and equipment removal. Expect to be back in business towards the end of the morning • When vac is out, RF tests with higher HV on the klystrons for about 1 h (parallel to pre-cycle) • pPb pilot run – 13 bunches each beam (max 24 h) • Thursday • 1000 m beta*, few bunches (max 24 h) • Friday • AM: pPb MD with 318 p+ bunches w. 4 Pb bunches (1 shift) • Test ramp, reversed LHCb polarity and split collision beam process • SPS switched over to Q20 optics • Physics LHC 8:30 meeting

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