LHC schedule

Installation activities in a sector QRL installation QRL consolidation after pressure test Cryo-magnet transport Interconnection phase 1 LSS installation End of 1st interconnect activity Pressure test Cryostat closure – Interconnect consolidation Insulation // Interconnect phase 1 Beam pipes & bake-out ELQA at warm Cool-down Power tests Machine check-out Beam at 450 GeV/C

Press release June 23 First collisions in the Large Hadron Collider (LHC) will happen in November 2007, said LHC project leader Lyn Evans at the 137th meeting of the CERN[1] Council held in Geneva today. A two month run in 2007, with beams colliding at an energy of 0.9 TeV will allow the LHC accelerator and detector teams to run-in their equipment ready for a full 14 TeV energy run to start in Spring 2008. The schedule announced today ensures the fastest route to a high-energy physics run with substantial quantities of data in 2008, while optimising the commissioning schedules for both the accelerator and the detectors that will study its particle collisions. It foresees closing the LHC’s 27 km ring in August 2007 for equipment commissioning. Two months of running, starting in November 2007, will allow the accelerator and detector teams to test their equipment with low-energy beams. After a winter shutdown in which commissioning will continue without beam, the high-energy run will begin. Data collection will continue until a pre-determined amount of data has been accumulated, allowing the experimental collaborations to announce their first results.

Operations Activity

Machine checkout and later Oct Operations testing Minimum HWC Nov Full Machine Checkout (TI8 & TI2, Access, Vacuum, Equipment Tests, Cycle and Set, BIC and INB) Beam Commissioning to 450GeV 16days estimated, 60%efficiency assumed Dec Engineering run (Collisions at 450GeV + Ramp Commissioning) Minimum HWC

Hardware Commissioning Calibration run in 2007 Installation Hardware Commissioning 450GeV Engineering Run Shutdown Machine checkout 450GeV Beam commissioning Calibration run 450GeV Kb 43 156 ib (1010) 2 4 10 * (m) 18 6 intensity per beam 8.6 1011 1.7 1012 6.2 1012 1.6 1013 beam energy (MJ) .06 .12 .45 1.1 luminosity 1028 1.3 1029 4.8 1029 3 1030 event rate 1 (kHz) 0.4 5 19 120 W rate 2 (per 24h) 0.5 21 130 Z rate 3 (per 24h) 0.05 0.6 13 Assuming 450GeV inelastic cross section 40mb Assuming 450GeV cross section W → lν 0.5nb Assuming 450GeV cross section Z → ll 50pb

Staged commissioning plan for protons@7TeV 2008 Stage I II III Hardware commissioning 7TeV Machine checkout Beam commissioning 43 bunch operation 75ns ops 25ns ops I Shutdown No beam Beam 2009 III Shutdown Machine checkout 7TeV Beam setup 25ns ops I Install Phase II and MKB No beam Beam

Issues LTC on July 5th will deal with Anything else ? Optics (Stephane) Dynamic aperture (Massimo) Collimators (Ralph) Beam dump (Brennan) Operation (Mike) Anything else ? Detecting collisions How long is 450GeV collisions useful for the experiments? Assuming we make the 2007 run, what about 2008? What if we don’t make the 2007 run?