Running scenario 2009/10
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Transcript of Running scenario 2009/10
Running scenario 2009/10
Run through components – and then synthesis
2009 - 2010
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 2009-201029 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 2010.
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 2009-201029 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 W39 - 26/27 September – in agreement with Alice, possibly ions
LHC 2009-201029 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
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Rapid shake-out of snap-back and ramp with very safe beams
Full Machine Protection Commissioning will need a well adjusted & understood machine
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Beam -proposal
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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 2009-201029 April 2009
Energy Safe Very Safe
450 1 e12 1 e11
1 TeV 2.5 e 11 2.5 e10
4 TeV 2.4 e10 probe
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.
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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 beams@1TeV
Test collision procedure and possibly squeeze mechanics at 1 TeV
LHC 2009-201029 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 beam@4TeV... Machine protection appropriate for increased intensity
and squeeze commissioning. Pilot physics
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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 ~19th December 2009 Earliest restart ~ 4th January 2010 Could possibly use weekends either end -12 days stop
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Would clearly need to define flat-line conditions, required support etc. over the break.
Xmas - delta
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Piquet Expert CCC
70 80 40
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
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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
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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…]
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Injectors 2009 (v3.5)
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LHC 2009
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LHC 2010 – very draft
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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 2009-201029 April 2009