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CMS-UK RAL 20/4/06 R M Brown - CCLRC 1
CMS Submission to PPGC
• UK Deliverables
• Status of CMS
• UK Progress & Commissioning Plans
• Computing
• UK Physics Programme
• Summary
CMS-UK RAL 20/4/06 R M Brown - CCLRC 2
The CMS Collaboration
April 2006
846
1061462528
2051
646949
182
UK Global Co-ordination RolesDeputy Spokesperson
T. VirdeeCMS Electronic Co-ord.
J. NashTK Project Manager
P.SharpTK Deputy PM
G. HallECAL IB Chair
R.BrownECAL Endcap Co-ord.
D.CockerillECAL Commiss.Co-ord.
K.BellTK Offline S/W Co-ord.
I.Tomalin‘e-’ Group Co-ord.
C. SeezHiggs Group Co-ord.
A. NikitenkoComputing Com. Chair
D.Newbold
M&O Authors 1081UK (4.0%) 43
Scientific Authors 2051UK 106Countries 38Institutes 182
CMS-UK RAL 20/4/06 R M Brown - CCLRC 3
Compact Muon Solenoid
ECAL
Tracker
4T solenoid
Muon chamber
s
HCAL
Iron yoke
Total weight: 12,500 tOverall diameter: 15 mOverall length: 21.6 mMagnetic field: 4 T
Person!
CMS-UK RAL 20/4/06 R M Brown - CCLRC 4
The UK in CMSBristol Imperial
CollegeBrunel
Tracker Readout System Global Calorimeter TriggerElectromagnetic Calorimeter Endcaps
Rutherford Appleton Laboratory
Source Card
Leaf Card
Computing - Software - Simulation - Physics
CMS-UK RAL 20/4/06 R M Brown - CCLRC 5
LHC Intersection Point 5CMS is pre-assembled on the surface and lowered in 17 sections weighing between 300 and 2000 tons
Surface Assembly Hall
Service Cavern(Readout, Trigger, P/S)
Experiment Cavern
CMS-UK RAL 20/4/06 R M Brown - CCLRC 6
Surface Assembly
Magnet complete, coil cold
Yoke Endcap (YE+1)installation ~ done
Muon Barrel Drift-Tube/RPCinstallation well advanced
10 sectors in wheels 0,+1,+2.2 sectors in wheels -1,-2.
HCAL being inserted into solenoid
CMS-UK RAL 20/4/06 R M Brown - CCLRC 7
Magnet closed: : May 06Magnet test/cosmic ray challenge: : May-Aug 06ECAL 1st half-barrel (EB+) installation : Aug 06 SX5Service Cavern ready for crates: : April-May 06HF lowering: : July 06Experiment Cavern ready for crates : Jul 06First connection to Service Cavern : Aug-Sep 06Central Yoke Section+Coil (YB0) lowering : Oct 06ECAL 2nd half-barrel (EB-) installation : Oct 06 SX5+(Jan-May 07 UXC) Tracker installation : Jan-Feb 07 ECAL/Tracker cabling complete : Apr-May 07Heavy lowering complete : Feb-Mar 07Initial CMS ready to close : 30 Jul 07ECAL Endcaps, Pixels installation : Dec 07 – March 08Schedule is tight, with no master contingencyOptions to recover ~2 months after Tracker installation under consideration
CMS Schedule: Key Dates
CMS-UK RAL 20/4/06 R M Brown - CCLRC 8
CMS ECAL Endcap (EE)UK has led EE project from inception
- Monte Carlo simulations - Performance optimisation- Vacuum Photo-Triode (VPT) R&D- Prototype beam tests at CERN
Deliverables:- Overall mechanical design- On-det. electronic design(+CERN)- VPTs (pay 50%, test 100%)- Mechanical structures(+Russia)- Assembly (with Russia, CERN)
Vacuum phototriodes:- Single stage pmt- Gain 8 -10 at B = 4 T- Radiation resistant (UV glass window)- Q.E. ~ 20% at 420 nm
Presampler
Environmental Shield (Russia)
Supercrystals
PositionalSpacers
Back plate
Ring flange
Moderators(Russia) HadCal
ElectronicsMechatronic
s
3.5 m
1"
CMS-UK RAL 20/4/06 R M Brown - CCLRC 9
EE Status
13800/15500 delivered (89%)
VPT Production & Testing
Electronic noise performance verified with a
detector module (25 channels)
mounted on a Dee(~3800 e/channel)
Alignment test of 2 Dees and Ring Flange mounted
on HCAL
Mechanics:All major components deliveredCMS ‘Gold Award’ to TM Engineers (UK)
CMS-UK RAL 20/4/06 R M Brown - CCLRC 10
EE Future Work2006 On detector electronics production
Assembly jigs and tooling completed Launch EE crystal production:SIC (China) Assembly of Dee1 from July
2007 Launch EE crystal production:BTCP (RF) Assembly of Dees Installation of Dees 1 & 2
2008 Installation of Dees 3 & 4Delivery of EE crystals is on the critical pathAssembly schedule tight: Parallel work to minimise assembly latency
Long term UK commitments - Maintaining and operating the EE- Maintaining the associated databases- Understanding and calibrating the detector - Estimated EID effort: 0.25 FTE in 08/09 & 09/10
EE Commissioning will only START in earnest AFTER end of Ring Fence
CMS-UK RAL 20/4/06 R M Brown - CCLRC 11
TOBTOB
TIDTIDTIBTIB
TECTEC
PDPD
CMS Tracker• Two main sub-systems: - Silicon Strip Tracker and Pixel Detector• Silicon Strip Tracker comprises: - Outer Barrel (TOB) - Inner Barrel and Disks (TIB-TID) - End-Cap (TEC) ~ 107 Channels, 220m2 Silicon
TIB Layer 2, after burn-in
Cosmics in TEC+
CMS-UK RAL 20/4/06 R M Brown - CCLRC 12
Tracker Electronic System
Input Rate ~ 1.2 TBytes/sec1.2 TBytes/secOutput rate ~ 50 GBytes/sec50 GBytes/sec
• Analogue readout• No on-detector zero suppression • Optical analogue data transfer
UK Deliverables:• Development of readout & control system• Delivery of APV & APVMUX ASICs ( ~100,000 die, inc spares)• Procurement of Front End Driver (~500 modules)
Status:• APV Project Complete On time, within budget• FED Procurement underway(eXception received a Gold Award)
CMS-UK RAL 20/4/06 R M Brown - CCLRC 13
Tracker Future Work2006: Final assembly and integration in TIF • Four large systems to be assembled and operated• Test complete tracker in up to 25% units• Delivery within budget requires staff from institutes
2007: Commissioning at Point 5• Lower, insert, cable, power,…• Commission off-detector electronics & first running
2008: Operations• Calibrate and tune performance
Optimise S/N, cluster finding in firmware• APV, APV emulator, FED, DAQ, Online Software
are key elements for Tracker to deliver good data• All require UK expertise• System of ~500 complex boards 1 FTE EID needed long term for maintenance
CMS-UK RAL 20/4/06 R M Brown - CCLRC 14
Global Calorimeter TriggerVital Role in CMS Trigger: Electron/ triggers Jet Triggers Transverse Energy Triggers RCT Readout System Luminosity Monitoring
Original GCT design was technically challenging - required very high speed (~3GB/s)
data transfer between many boards
major revision Jan 2006- Large, powerful FPGAs concentrate
algorithm processing in few locations- Optical links bring large number of
input signals to processing boards
New design to be delivered by July 07- UK led with CERN engineering effort
CMS-UK RAL 20/4/06 R M Brown - CCLRC 15
The New GCT Design
Software: Simulation (efficiencies)Testing and CommissioningOnline MonitoringOnline Control
There are four different types of card:
Source Card (54 needed):Translates electrical signals from RCT to optical
Leaf Card (8 +1() needed):Main algorithm card of the GCTElectron and jet finding and sorting, all ET calculationsProven design from a satellite project (LANL)
Concentrator Card (1+1() needed):Communicates with rest of Trigger and upstream DAQ
Wheel Card (2 needed):Supports Leaf Cards, performs final jet-finder calcs
CMS-UK RAL 20/4/06 R M Brown - CCLRC 16
GCT Future Work
2006: Development and integration phaseAug Integration of Source Card + Leaf Card
Oct Integration Source + Leaf + Concentrator
2007: Commissioning phaseJan Commissioning Electron TriggersJul Commissioning Jet Triggers
2008: Operations phaseRespond to actual CMS conditionsCalibrate, evaluate & tune trigger performance
Trigger must operate with 100% availability 1 FTE EID needed long term for maintenance
New design can be scaled and commissioned in stages
Electron data from ½ RCT
Electron data from ½ RCT
Electron data from ½ RCT
Leaf Cards
Wheel Cards
Concentrator Card
CMS-UK RAL 20/4/06 R M Brown - CCLRC 17
Computing status Major milestones in last two years:
– CMS Computing Model fully defined, documented in Computing TDR– Operational prototypes of all ‘infrastructural’ software in place
Major UK contributions to data and workflow management systems– Integration with Grid systems (WLCG) now well advanced– Decision taken to adopt new application framework in May 2006
Upcoming milestones before 2008– CSA2006 (computing, software, analysis): 25% scale test of full
computing system, Sep 2006– Full computing system readiness by April 2007– Factor-of-two final resource ramp up before April 2008
CMSUK Deliverables 2006 - 8:– Delivery and support of software components for CMS– Ramp-up and operation of Tier-1 and Tier-2 computing centres– Maintenance and support of computing system for UK analysis
CMS-UK RAL 20/4/06 R M Brown - CCLRC 18
UK Computing Project Project organisation
– Organised as single coherent project, covering GridPP, e-science, centre operations, service challenge effort
– Project currently limited by available manpower Further physicist / e-science effort will become available in 2007 Vital to retain our expert GridPP / e-science personnel
– Project plan is fully tied to CMS global milestones Work areas:
– ‘Infrastructural’ software deliverables (key for CMS) [2 FTE] PhEDEx: manages all offline data; BOSS: user interface to the Grid
– Computing system ramp-up and support [1.75 FTE] Software installation and maintainance; DB management Data challenge activities; integration with new RAL CASTOR system
– ‘Physics ops’: data handling, reconstruction, MC prod [2 FTE]– Documentation, user support for analysis [1 FTE]
CMS-UK RAL 20/4/06 R M Brown - CCLRC 19
Computing Plans & Challenges Major UK milestones 2006 – 8:
– Jul ‘06: All UK centres take part in new framework MC production;new user support resources (web-based) in place
– Sep – Oct ‘06: Full UK participation in CSA2006 at 25% scale– Dec ‘06: RAL CASTOR system fully integrated with CMS system– Apr ‘07: UK systems ready to take data; final versions of PhEDEx, BOSS;
funded plan for ramp-up to full system scale– Apr ‘08: Ready for full scale data taking
Key challenges:– Retention of expert staff: systems are highly complex, will require constant
‘tuning’ in 2007 – 8– Scale of Tier-1 hardware resources
CMS extremely short of Tier-1 storage and CPU; UK is the smallest contributor, despite high profile on CMS
May need to descope CMS Computing Model in light of serious shortfall Critical factor for effective physics output in UK and Europe
CMS-UK RAL 20/4/06 R M Brown - CCLRC 20
UK Physics Strategy Build on existing expertise
- Tracker- ECAL- Test beam analyses- Simulation studies
Plan smooth transition from detector/reconstruction studies to physics Emphasise preparations for leading involvement in early analyses But balance with developing tools to achieve longer term physics goals Develop close working collaboration with theorists to ‘gain an edge’ Work cohesively with the wider world of CMS
UK provides 3 CMS ‘PRS Convenors’:(Physics, Reconstruction, Software)• ECAL- e/ • Tracker- b/ • Higgs
Organisation:2 ‘Physics Co-ordinators’
(One at CERN, One in UK)Regular programme of meetings
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CMS Physics TDRCMS physics activities are focused on Physics TDR Volume 1: Published December 2005
- Validation of detector simulation- Development of reconstruction algorithms- Techniques for Calibration, alignment, synchronisation…
Volume 2: To be published May 2006- Complete analyses (backgrounds, misalignment,
miscalibration)- Demonstration of physics capability with 10 fb-1, 30 fb-1
(low luminosity L=2×1033)
Volume 3: Due December 2006- Commissioning- Start-up procedures- First physics
Detector Performance and Software
Physics Technical Design Report, Volume I
Physics PerformancePhysics Technical Design Report, Volume II
CMS-UK RAL 20/4/06 R M Brown - CCLRC 22
UK Contributions to Physics TDR Defining content and work, final editing, detailed contributions:
Physics TDR Volume I: Detector Performance and Software
ECAL Intercalibration using We
106 Fully simulated
events
ECAL Test Beam analysis
Beam
0 50 100 150 200 GeV
/E%
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Super Module
CMS-UK RAL 20/4/06 R M Brown - CCLRC 23
UK Contributions to Physics TDRPhysics TDR Volume II: Physics Performance
qqH, H ℓ + jet WW, ZZ
Fusion
jet2
jet1
b jet1b jet2
jet2
jet1
b jet1b jet2
MSSM: bbH/A,H/A 2 jet
CMS-UK RAL 20/4/06 R M Brown - CCLRC 24
First Physics Exciting results possible with ~fb-1 of data Concentrate initial analysis efforts on early discoveries
Exploit connections between detector understanding,reconstruction & selection algorithms and physics
Focus on e, , energy-flow, and then eg: Study W e, Z ee, leading to:
W' e, Z' ee, (and eventually, H ZZ* eeℓℓ
eg: Study W + jets, Z + jets, Z , leading to:b-jet tagging, H searches
CMS-UK RAL 20/4/06 R M Brown - CCLRC 25
Higgs Physics As luminosity increases, concentrate progressively on Higgs searches
Strong UK interest demonstrated by range of studies already underway:
)h MSSMor HSM(ττ,qq 0
ττ/AH,/AHbb 0000
bbhandZ,ZhA 000 model)Sundrum-(Randalγγhandbbh,hhRadion 0000
class) thisindecays other (plusνχorχqqχ,bχt~,bbh,ht~t~ 01
0111
00
scenario) CPX (inν Wand bbH W,HH,bHt 11
tt/AH 00 decay)invisible(i.e.χχh,hqq 0
101
00 ττH,Htt 00
CMS-UK RAL 20/4/06 R M Brown - CCLRC 26
Direct ,Triple Gauge Couplings UK leads studies of gluon structure function of
through prompt production Useful results with 1-3 fb-1
Analysis will provide valuable input for development of H searches
UK also leads TGC study for Physics TDR
Responsible for W+, Z+ channels & backgrounds TGC sensitivity requires high L If no ‘smoking gun’: Anomalous TGC could provide vital signature of BSM
Wq
q
ℓ
sensitive to
non-SM Physics W+jet background to W+
CMS-UK RAL 20/4/06 R M Brown - CCLRC 27
Summary of CMS RequestRequest (£k) 2006/2007 2007/08 2008/09 2009/10
Maintenance & Operating (M&O) Costs
165.0 170.0 171.0 171.0
Common Fund (M&O) Costs 120.0 157.0 180.0 196.0
Travel - Short Term (UK + Abroad) 0.0 0.0 170.2 170.2
Travel - Long Term 0.0 0.0 254.5 254.5
TOTAL 285 327 776 792
RAL EFFORT (SY)
ED Effort 0 0.00 0.10 0.10
ID Effort 0 2.00 2.15 2.15
Other (specify) 0 0.00 0.00 0.00
TOTAL 0 2.00 2.25 2.25
CMS-UK RAL 20/4/06 R M Brown - CCLRC 28
Summary• CMS assembly is proceeding without significant technical problems
• Solenoid is cold: Magnet test and ‘Cosmic Challenge’ start next month
• Schedule is tight for ‘Ready-for-Beam’ in July 07
• UK Tracker Readout deliverables on schedule
• ECAL Endcap completion limited by crystal delivery: Install Spring 08
• Revised GCT design is advancing rapidly
• Computing
• UK is making strong contributions to CMS Physics TDR
• A coherent UK physics programme is underway
CMS-UK RAL 20/4/06 R M Brown - CCLRC 29
Tier-1 Issue Role of Tier-1 centres:
– Long-term storage (‘curation’) of raw data– Bulk reprocessing of data for reco, skimming, calibration, analysis– Serving data to Tier-2 centres (all data comes through Tier-1)
Resource situation for CMS:– European Tier-1 contributors do not have large CMS fractions– WLCG ‘pledge system’ results in major shortfall in Tier-1 resources
This is emergent behaviour: funding ‘formulae’ may locally make sense in each country, but do not address the global problem
– Individual Tier-1 centres are well-run, but far below critical mass Only US, Italian centres approach ‘nominal’ Tier-1 size
Strategy:– Funding system must be examined - LHCC asks for CMS input– Must look at new ways to make maximally efficient use of resources
Potential danger if redundancy & robustness traded against resources– The CMS computing model may need to be descoped (in Europe)
Urgent need for adequate and realistic Tier-1 resources in UK