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Review of MD Program Impact - Decision Making Underway

Discussion on time loss due to IR8 cryo problem, impacting MD program for LHC performance in 2012. Share input for LMC meeting decision later today. Consider rescheduling lost MDs for better performance. Reviewing upcoming MDs for possible delays and re-prioritization. Decisions crucial for successful 2012 run and machine commissioning. Possible early scheduling of critical MDs in 2012 to feed into commissioning. Share thoughts and suggestions for optimizing MD program.

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Review of MD Program Impact - Decision Making Underway

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  1. Tue/Wed 1-2.11.11 • Lot’s of time lost due to cryo problem in IR8. • Major impact, therefore review of MD program… • Start discussion here, please let us know your input. • Will probably decide in LMC meeting this afternoon. LHC morning report

  2. MD Planning Sun – Mon (30. – 31.10.) LHC morning report

  3. MD Planning Tue (1.11.) LHC morning report

  4. MD Planning Wed (2.11.) LHC morning report

  5. MD Planning Thu (3.11.) LHC morning report

  6. MD Planning Fri (4.11.) LHC morning report

  7. Scenario 1 LHC morning report

  8. Shouldwere-schedule? Fordiscussion... • 25ns LR beam-beam MD delayedto 2012 after likely 25 nsscrubbingrun. CMS solenoidisoff (e-cloudeffects). • Lost MD‘swithimpact on decisions/performancefor 2012 running: • Tightcollimationsettingsforachievablebeta* (combinedwith ATS to 40 cm) • Beam instrumentation MD  neededforfinetuningof LHC performance • IR2 aperture  neededforfeasibilityof 1m beta* in ionrun • 45 degreecrossing in IR8 • Lost MD‘swithimpactforrequired upgrade studies: • Beam shapescraping coll & machineprotectionstudies • Lost MD‘sforcommissioning / testingnewtechniques: • Quenchmarginat 3.5 TeV  beam blow-upwith ADT • UpcomingMD‘sthatcanbedelayedtobeginningof 2012 runwithoutdirectimpact on decisionsfor 2012 running: • Quenchmarginsat 450 GeVand 3.5 TeV • Non-linear dynamics • ATS to10cm • Combinedrampandsqueeze LHC morning report

  9. Shouldwere-schedule? Fordiscussion... • Must decide on whetherwewanttore-prioritize MD program. • Possibilitytoschedule IR2 aperture check early (ioncommissioningstudy). Gain time back on Saturdaymorningfromioncommissioning (ion beam workedverywellduringproton – lead MD). • Can weschedule an early MD in 2012 toperformthedelayedMD‘sandtofeedresultsintothe 2012 commissioningofthemachine? LHC morning report

  10. Scenario 2 LHC morning report

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