Finale?Finale?

IOP HEPP 2009

OxfordApril 8, 2009

Sergio BertolucciCERN

LHCLHC

2009-2012: deciding years

Experimental data will take the floor to drive the field to the next steps:

LHC results13 (T2K, DChooz, etc..) masses (Cuore, Gerda, Nemo…)Dark Matter searches…….

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Preparing the next steps

More globalization

More (coordinated) R&D on accelerators and detectors

More synergies between Particle and Astroparticle Physics

More space for diversity

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Repairs: Present Status

The LHC is an unprecedented adventureThe LHC is an unprecedented adventureImperative to progress with careImperative to progress with care

— — warmwarm— — coldcold

Repair for all magnets completed

By Eastern: last magnet into tunnel

LHC cool down statusLHC cool down status

LHC Status (Allegro ma non troppo)

Understanding of the incident satisfactory

Huge improvements on the QPS

Damage mitigation measures implemented

Repairs proceeding well

Substantial collaboration from experiments and/or external laboratories helps keeping the schedule under control

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Repairs and Restart Enhanced quench protection system (QPS): Enhanced quench protection system (QPS):

More precise system to monitor (and protect) anomalously high resistance in a joint (splice) near the magnets.

A QPS threshold of 0.3mV is needed0.3mV is needed The QPS QPS will be upgraded upgraded everywhere to cover all busbar splicesto cover all busbar splices

Improve pressure relief devicesImprove pressure relief devices:: The four warm sectors will be equipped with extra pressure relief valvesextra pressure relief valves (PRVs)

on all dipole cryostats The four cold sectors will get extra PRVs on all short straight section cryostats.

This can be done with the sectors cold and is adequate for 5 TeV operation

The whole machine will be cold by mid August, ready for first first injected beam in late Septemberinjected beam in late September

The machine will run at 5 TeV until autumn 20105 TeV until autumn 2010 after which the remaining 4 sectors will be equipped with PRVs and will be prepared for high energy operation

Latest schedule for getting ready for beamDRAFTDRAFT

Full Machine Checkout and Global Machine Protection System tests

Beam Commissioning

Action taken to

recuperate 3 wks

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Present Status of ExperimentsUse time in most efficient way:Use time in most efficient way:

Installation of some detector components, some repairs, commissioning using cosmics

Gain operation experience in situ before collisions start

ATLAS: 216 million cosmic events

CMS: 300 million cosmic events

CMS

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Beam Conditions for Physics

Machine protection will be tested with beam (at 0.45 TeV energy levels)

Beam energy limit in 2010: 5 TeV Beam energy limit in 2010: 5 TeV

Estimated integrated luminosity Estimated integrated luminosity The The during first 100 days of operation.. during first 100 days of operation.. ≈ 5≈ 50pb0pb-1-1

Peak L of 5.1031 η (overall) = 10% gives 0.5pb-1/dayPeak L of 2.1032 η (overall) = 10% gives 2.0pb-1/day

During next 100 days of operationDuring next 100 days of operation ≈ ≈ 200pb200pb-1-1??

Towards end of year (2010) heavy ion runheavy ion run

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LHC Physics in 2009/2010LHC Physics in 2009/2010

First beams: First beams: very early physics - rediscover SM physicsrediscover SM physics Detector synchronization, in-situ alignment and calibration

10 pb10 pb-1-1: Standard Model processes measure jet and lepton rates, observe W, Z bosons first lookfirst look at possible extraordinary signaturesextraordinary signatures…

Measure Standard Model ProcessesMeasure Standard Model Processes (at 10TeV need ~ 30pb-1):

~ 104 Z e+e- (golden Z’s for detector studies (1%))

~ 105 W e~ 103 ttbar (measure to 10%)

Initial Higgs searches and searches for physics beyond the SM

Background for new physics

Need to understand very well

30 pb30 pb-1-1

> 200 pb> 200 pb-1-1 Entering Higgs discovery era and explore large part of SUSY and new resonances at ~ few TeV

Integrated luminosity Integrated luminosity vs energy vs energy

What do we need to match the Tevatron, which aims for 9 fb-1 by 2010 ?

What is the minimum amount of data at given energy that is needed to make the 2009 physics run useful ? (assuming CM energy 8 < s1/2 < 10 TeV)

Top quark

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Z’

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SUSY, an example

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Not only LHC…..

A workshop on “New Opportunities in the Physics Landscape at CERN” will take place at Cern on May 10-13, as a starting point to assess new ideas for unique experiments, which can be performed at Cern, outside the LHC programme.

http://indico.cern.ch/conferenceDisplay.py?confId=51128

Large interest in the community, more than 100 abstract received

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Not only LHC, (cont…)

A neutrino workshop, coorganized with the SPC Study Group, will be held at the beginning of October 2009, to focus the discussion on the European strategy on physics

A stronger connection among the CLIC and ILC accelerator and detector R&D is being realized.

A technical review of the LHC new injection chain (LINAC4,SPL,PS2) is underway

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Making CERN more global

Council group for CERN enlargement has been setup and has started to organize its actions.

Cern has intensified bilateral meeting with the other regions (labs, agencies)

More proactive role of Cern in improving networking among the European Labs

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In summary

By year 2012, experimental results will be dictating the agenda of the field.

Early discoveries will greatly accelerate the case for the construction of the next facilities (Linear Collider, -factory, SLHC…)

No time to idle: a lot of work has to be done in the meantime

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In summary

We will need

FlexibilityPreparednessVisionary global policies

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!

LHC ring:27 km circumference

CMSCMSCMSCMS

ALICEALICEALICEALICE

LHCbLHCbLHCbLHCb

ATLASATLASATLASATLAS

Very exciting years are ahead of usVery exciting years are ahead of usVery exciting years are ahead of usVery exciting years are ahead of us