Running scenario 2009/10 Run through components – and then synthesis

Chamonix Baseline  1 month commissioning  10 month proton physics  1 month Lead Ions  “Short technical stop over Christmas period”  Shutdown – end September 2010  Built in slip potential LHC April 2009 “The CERN Management today confirmed the restart schedule for the Large Hadron Collider resulting from the recommendations from the Chamonix workshop. The new schedule foresees first beams in the LHC at the end of September this year, with collisions following in late October. A short technical stop has also been foreseen over the Christmas period. The LHC will then run through to autumn next year, ensuring that the experiments have adequate data to carry out their first new physics analyses and have results to announce in The new schedule also permits the possible collisions of lead ions in 2010.”

Before full beam commissioning Hardware Commissioning Dry runs  Controls, LBDS, Injection, RF, Collimators etc. etc.  Underway seriously since March Thanks to LHC EICs and operators – days shifts explicitly for this Machine Protection Commissioning  In parallel with HWC Machine Checkout  Sector by Sector as the circuits become available  Global before taking beam LHC April 2009

Beam Tests TI8  6/7 June - successful TI2  Next weekend – 11/12 July TI2/TI8  29/30 August Injection test – beam 1  End W /27 September – in agreement with Alice, possibly ions LHC April 2009

Beam commissioning - what we learnt in 2009? Very rapid progress  multiple system commissioning in parallel (probably too much) Key beam instrumentation in reasonable shape  still much to do but basic functionality is there  only initial measurements made Reasonable magnetic model of the machine Optics and aperture measurements encouraging Key systems only just started  Injection and protection, LDBS, Collimation, RF, Magnets  Machine Protection with beam LHC April 2009

Rapid shake-out of snap-back and ramp with very safe beams Full Machine Protection Commissioning will need a well adjusted & understood machine LHC April 2009

Beam -proposal LHC April 2009 Global Machine Checkout Essential 450 GeV Commissioning System/beam Commissioning Machine Protection Commissioning 4 TeV beam & collisions 450 GeV collisions Ramp commissioning to 1 TeV Full Machine Protection Commissioning Pilot physics System/beam Commissioning

BC plan 1/3 Establish circulating beams (phase A.3 – fast track)  Key instrumentation and measurements Tune, chromaticity, coupling, optics, orbit acquisition and correction  RF capture and adjustment  LDBS – phase 1  Essential machine protection for 450 GeV+ LBDS, BLMs, BIS, experiments  Collisions at 450 GeV  few shifts LHC April 2009 EnergySafeVery Safe 4501 e121 e11 1 TeV2.5 e e10 4 TeV2.4 e10probe

MPS 450 GeV Ring and injection BIS fully commissioned:  All USER_INPUTs operational  BEAM_PERMIT loops operational. Fully commissioned clients (of course only non-beam part):  All injection BIC inputs.  PIC and WIC inputs.  PIC configuration is ‘light’ – all maskable.  Vacuum inputs.  Collimator inputs.  Experiment inputs.  SIS experiments protection.  BTV inputs (also SIS).  BLM inputs.  LBDS – 450 GeV OP. 9 Jorg Wenninger

BC plan 2/3 Ramp to low energy (~1 TeV) with safe beam  appropriate machine protection established  snapback, FiDeL predictions, etc.  RF  Q, Q’, orbit (10 Hz) measurements,  aim for circulating beam at 1 TeV  LDBS > 450 GeV  repeat until 2 Test collision procedure and possibly squeeze mechanics at 1 TeV LHC April 2009

BC plan 3/3 Commission Machine Protection appropriate for low intensity to 4 TeV:  FMCMs, PIC, Collimators, TCDQ, BLMs, BPM interlocks, SMPs, RF frequency, LBDS… Beam and system commissioning - ramp to 4 TeV  beam dump, collimators, BLMs, RF…  Tune, Q’, coupling, orbit… Two Machine protection appropriate for increased intensity and squeeze commissioning. Pilot physics LHC April 2009

Christmas Technical Stop Given need to provide coverage for:  Personnel Safety: Access, Radio Protection, SOs etc.  LHC expert coverage Controls, Beam Instrumentation, ABT, ABP, Survey, RF, Magnet, QPS, Cryogenics, Power converters, collimation, MP3, ELQA, vacuum, RP, access, industrial controls, machine protection  Other: IT, safety, transport  Injectors: operations plus expert coverage  Full LHC OP shift coverage (bearing in mind 2010) Proposal:  Stop LHC with beam ~19 th December 2009  Earliest restart ~ 4 th January 2010  Could possibly use weekends either end -12 days stop LHC April 2009 Would clearly need to define flat-line conditions, required support etc. over the break.

Xmas - delta LHC April 2009 PiquetExpertCCC

Questions Can we do it effectively?  Machine availability compromised by lack of expert coverage? Can we do it safely?  Will nQPS/EE etc be fully debugged etc?  Will the machine protection system be fully commissioned? Status of LHC beam commissioning?  Initial commissioning Requires comprehensive expert coverage across the board. Critically Machine protection system qualification could still be ongoing. Extensive expert presence required.  Pilot physics Foresees low intensity physics running combined with system commissioning with beam, MPS commissioning, squeeze development etc. Expert presence required.  Stable physics running Even with unchallenging betas, intensities… very optimistic LHC - running over Christmas 20th May

Maintenance needs Injectors  Making the assumption that essential maintenance can be performed before, after or in the shadow of LHC technical stops LHC  Number of important issues to be addressed  Careful coordination will be required  However: no extended maintenance period appear to be required by LHC systems during the October 2009 through September 2010 run LHC April 2009

Monthly technical stop Programmed 3 days including recovery and re-closure of ring  QPS plus power converters, controls, R2E etc.  Cool-down will become an issue Mon – Wed allowing weekday time for re-setup with beam Followed by one day set-up with beam and systematic checks of machine protection system Clearly if major breakdowns occur at other times – advantage will be taken. Injector maintenance in parallel is an option [Have not considered scheduling of MD…] LHC April 2009

Injectors 2009 (v3.5) LHC April 2009

LHC 2009 LHC April 2009

LHC 2010 – very draft LHC April 2009

Conclusions 4 stroke commissioning before beam beam tests as last year Staged MPS commissioning and fast track for first low intensity collisions Full MPQ qualification before intensity increase followed by interleaved physics and commissioing. Stop for 2 weeks at Christmas No major injector/LHC driven maintenance required Monthly maintenance periods are foreseen Preliminary schedule for 2009/2010 shown LHC April 2009