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LHC Machine Status Report

LHC Machine Status Report. Steve Myers For the LHC team. Reminder of 2012 Priorities. Pile up and 25ns. The LHC machine must produce enough integrated luminosity to allow ATLAS and CMS to independently discover the Higgs before the start of LS1.

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LHC Machine Status Report

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  1. LHC Machine Status Report Steve Myers For the LHC team

  2. Reminder of 2012 Priorities Pile up and 25ns S. Myers The LHC machine mustproduceenoughintegratedluminosity to allow ATLAS and CMS to independentlydiscover the Higgsbefore the start of LS1. We must alsoprepare for the proton-lead ion runat the end of the year. We must (in 2012) do the necessary machine experiments to allow high energy, useful high luminosity running after LS1.

  3. At the last LHCC S. Myers

  4. A few weekslater 4th July: Melbourne Proton Physics run extended by 2.5 months S. Myers, STOA, Brussels

  5. p-Pb Collisions in ALICE, ATLAS, CMS, LHCb ALICE event display LHCf, TOTEM will join for main run in January. Luminosity remains uncertain. Hope to gain factor 500-1000 and integrate 20-30 nb-1 S. Myers SPC

  6. Collision 1000 m beta* • 07:00 Collisions at ALPHA, about 1 Hz S. Myers SPC

  7. Today S. Myers

  8. Last 3 years S. Myers

  9. This Year S. Myers

  10. With the modifiedschedule S. Myers

  11. To be done before the end of 2012 • Produce Integrated Luminosity • 25 ns tests • Electron cloud and vacuum (scrubbing) • Crossing angle, aperture, beam-beam, min β* • Maximum pile up? • UFOs • HOM heating • Comparison 25 vs 50 ns • β* levelling testing New MKI8 Will need some physics running Well advanced in MD S. Myers, RRB

  12. FUTURE S. Myers SPC

  13. LS1 then operation around 7TeV/beam • LS1 Work • Repair defectuous interconnects • Consolidate all interconnects with new design • Finish off pressure release valves (DN200) • Bring all necessary equipment up to the level needed for 7TeV/beam S. Myers SPC

  14. Linear schedule EDMS 1227656 (rev1.0, July 26th, 2012) No contingency S. Myers SPC

  15. Thenoperationat 6.5TeV per beam • Assumptions • E=6.5TeV • β* = 0.5m (maybe 0.4m) • All other conditions as in 2012 i.e. no improvement (yet ??) in injector brightness, LHC availability same etc S. Myers SPC

  16. Comparing pile up and integrated luminosity for 25ns and 50ns with levelling S. Myers, RRB

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  23. Summary • Integrated luminosity goal for 2012 exceeded • “Higgs” discovered • Proton-lead run in excellent shape (some published results already) • LS1 plans in good shape (? Quadrupolediodes) • Operation after LS1 • 25ns: injector brightness, e-cloud, HOM, beam-beam related, UFOs (machine studies sooon) • 50ns: β* levelling (maximum permissible pile up) S. Myers, RRB

  24. Thankyou for your attention S. Myers

  25. SPARES S. Myers SPC

  26. S. Myers, STOA, Brussels

  27. 1983: Preliminary Performance Estimates for the LHC (S.Myers and W. Schnell, 11th April 1983) 1984: Kick off meeting to discuss ideas for an accelerator to collide protons at very high energy 1996: Final decision for the LHC, the most complex scientific instrument ever constructed 10 September 2008: Start of commissioning with beam 19 September 2008: Serious incident and damage 19 November 2009: Restart of beam operation December 2009: first collisions at 2.38 TeV Today: successful operation, providing millions of particle collisions for the LHC experiments About 2035: The LHC physics programme to be finished ? A >50 Years Adventure The LHC Life cycle

  28. 6.5TeV: 25ns 6.5Tev: 25 ns β* = 0.5m 148 days of physics Lpeak ~7.5E33µ = ~17 • Optimistic • Possible intensity limitation • Possible limitation to β* • More scrubbing needed • E-cloud • UFOs • HOM heating? Days since start of 2015 run S. Myers SPC

  29. 6.5TeV per beam with 50ns 6.5Tev: 50 ns β* = 0.5m 148 days of physics Lpeak ~10.5E33µ = ~50 Days since start of 2015 run S. Myers SPC

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