john womersley particle physics in cclrc john womersley director of particle physics, cclrc zeuthen...
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John Womersley
Particle Physics in CCLRCParticle Physics in CCLRC
John Womersley
Director of Particle Physics, CCLRC
Zeuthen
May 2006
John Womersley
• The “constellation” of smaller national laboratories forms an important pillar of European particle physics
– amplifiers for the national programmes – allow researchers to do more: detector construction, engineering
expertise, computing, project management, test beams…– many labs have a broader mission: opportunity for synergies and
connections with non-PP applications
• To do this the laboratories must flourish as centres of scientific thought– places that the best physicists will want to work at– centres of gravity for the national programmes and sources of
leadership, when and where appropriate
• Particle Physics at RAL– roughly 100 people in PP department, plus engineering,
instrumentation, accelerator, computing in other parts of the lab– total budget ~ £29M, almost all through PPARC, peer reviewed as part
of the UK grants process– Good connections with rest of laboratory and UK university groups
John Womersley
ATLASATLAS
Semiconductor Tracker
Major components of the tracker designed and built at RAL
All three levels of the Trigger system
Final Barrel assembly at CERNSeptember 2005
Barrel at RAL
ATLAS mid 2005
Trigger cabling in progress
Project leadership for
first level calorimeter
trigger
John Womersley
CMSCMS
Electromagnetic Calorimeter Endcaps
• Leadership of project• Design/construction• Photodetectors & HV
Tracker Readout Electronics
• System design• ASIC & board design• Firmware & control S/W
PbWO4 crystals
VPT
~ 14,500 assemblies(~12,000 VPT delivered)
~ 450 ‘FED’ VME Modules
Each reading out 25,000 Si strips
(~ 100 FED delivered)
Testing photodetectors in a magnetic field
FED Module
John Womersley
BaBar at SLACBaBar at SLAC
Physics analysisPhysics analysis
Run control(also to be used in ATLAS, LHCb)
Run control(also to be used in ATLAS, LHCb)
Simulation: 109 events/yearSimulation: 109 events/year
Trigger electronics upgradefor drift chamber
Trigger electronics upgradefor drift chamber
Front end cap calorimeter
Front end cap calorimeter
John Womersley
LHCbLHCb
CCLRC role
Construction of Ring Imaging Čerenkov (RICH) detectors:
Engineering
Hybrid Photon Detector (HPD) testing
Detector Control Systems
Simulation and reconstruction software
Computing
infrastructure
Physics analysis
HPDs in test beam at CERN
Čerenkov rings in test beam
RICH2 ready for transport
LHCb cavern
John Womersley
LHC Computing and GridLHC Computing and Grid
• Building and operating the UK Particle Physics Grid in collaboration with GridPP and as part of the LHC Computing Grid and EGEE.
– About 30 people altogether • UK Tier-1/A Facility
– operated by E-science centre & PPD staff
– ~1000 CPU, 220 TB disk– 1.2 PB tape (0.2 used)– Network to CERN
(10Gb/s in 2006)• SouthGrid
– Tier-2 node in PPD• Middleware engineering• Security• Grid Operations (joint with ESC)
– for UK/Ireland– 1 of 6 global operations sites
• Experiment integration & support
Number of concurrent jobs, Summer 2005
RAL planning a new computer
building
John Womersley
The International Linear ColliderThe International Linear Collider
• CCLRC is strongly involved • Significant accelerator work
– Final focus, beam delivery system• ASTeC• New UK Accelerator Institutes
• Detector work– LCFI– Ramping up effort in CALICE
• LCFI: R&D for linear collider vertex detector
• Identify heavy quark jets– e.g. Higgs bb,cc
• RAL group has a central role– Mechanical studies– Sensor development– Physics studies
John Womersley
Neutron Electric Dipole MomentNeutron Electric Dipole Moment
• Cryogenic apparatus at ILL in Grenoble
– Sussex, RAL, Oxford, Kure, ILL• Builds on previous successful
experiment– world’s best limit 3 10-26 e cm
• Installation underway; start running next summer
• Goal is sensitivity of few 10-28 e cm (by 2009)
goal
• A permanent neutron EDM requires Parity and Time Reversal Violation
• T Violation implies CP Violation• In the Standard Model
– dn< 10-31 e cm
Supersymmetry at the EW scale
– dn< 10-25 e cm
Complementary to accelerator supersymmetry searches
John Womersley
Dark MatterDark Matter
• Dark Matter low rate, small energy deposits
– Very sensitive detectors– Well shielded– Underground to avoid
cosmic rays
CCLRC– Started UKDM programme – Developed and built Boulby facility– Designed and constructed series of
detectors– Currently running ZEPLIN II
• Liquid Xenon scintillation/ionisation detector
• Underground infrastructure– Project management and finance
control
Lord Sainsbury opens the Boulby Underground facility, 2003
ZEPLIN II liquid xenon detector in shield and associated gas system
Interactions in the xenon
John Womersley
Explore CP violationNeutrino Factory• Build community, international
scoping study design study • RAL is one credible site
Learn more about neutrino mixing angles (govern CP violation)
T2K• Secure a strong role in detector and
accelerator development and in physics analysis
• Build up UK neutrino community
MINOS• Operations
and analysis
The Neutrino ProgrammeThe Neutrino Programme
MICE• Demonstrate
muon cooling
Technology demonstration
John Womersley
MICEMICE
• To explore CP violation in the neutrino sector…
• Muon storage ring as a neutrino factory:
– requires storing muons within 2μs
– Ionisation cooling of the muon beam
– never been tried– MICE is the
technology demonstrator
• RAL is home to an international collaboration of ~150 physicists
• Installation starts later this year
• Aim for results by the end of the decade
4T solenoid& tracker
4T solenoid& tracker
Liquid hydrogen
Acceleratingcavities
µ
RF cavity test at Fermilab
MICE Hall
Tracker prototype at KEK
John Womersley
http://www.ost.gov.uk/policy/nextsteps.pdf
Changes coming in UK?Changes coming in UK?
John Womersley
Room to dream!Room to dream!
• ISIS• ISIS 1MW
upgrade• ESS-class 5MW
spallation source• Neutrino factory• Future multi-TeV
muon collider
Harwell Science and Innovation Campus
John Womersley
SummarySummary
• Current projects address fascinating and fundamental science questions• CCLRC is helping the UK to play key roles in the world programme
• Our priorities
1. scientific exploitation of LHC
2. R&D to prepare both for linear collider and for future neutrino facilities, with a decision time around the end of the decade
3. breadth of programme through smaller experiments where we can have a key impact
• CCLRC and PPARC have issued a joint statement indicating support for accelerator R&D. There will be a call for proposals (~ June) for the continuation of UK Linear Collider accelerator work, MICE phase II and for neutrino factory design study work.
John Womersley
• Any future model for a "strategy for European particle physics" should acknowledge the important role played by the smaller national labs
• There needs to be a careful balance between – the need to have everyone pulling in a coherent direction
• maximise effort– the need to maintain the freedom for labs to operate independently and
come up with new ideas and projects of their own• maximise creativity