The Compact Muon Solenoid at the Large Hadron Collider

Home , Compact Muon Solenoid

CMSCMSCMS DetectorDetectorDetector

Jim Freeman CMS 101

CMS 101 JF Nov 10, 2005 1 WhatWhat andand WhereWhere isis CERN,CERN, LHC,LHC, CMS?CMS?

European Large Center for Hadron Nuclear Research Collider (CERN) (LHC)

CMS 101 JF Nov 10, 2005 2 CMSCMSCMS DetectorDetectorDetector SubsystemsSubsystemsSubsystems

CMS 101 JF Nov 10, 2005 3 CMSCMSCMS atatat LHCLHCLHC PointPointPoint 555

UX5 about 100 meters underground

CMS 101 JF Nov 10, 2005 4 PointPointPoint 555 ((( aaa couplecouplecouple ofofof yearsyearsyears ago)ago)ago)

Installation Shaft

SX5

CMS 101 JF Nov 10, 2005 5 CivCivCivEng:Eng: Eng: SX5SX5SX5 andandand pitpitpit-head--headhead covercovercover

CMS 101 JF Nov 10, 2005 6 UXC55ExperimentExperimentExperiment Feb 05 CavernCavernCavern UXC55UXC55UXC55 delivereddelivereddelivered tototo CMSCMSCMS

CMS 101 JF Nov 10, 2005 7 UXC55UXC55UXC55 RightRightRight NowNowNow

CMS 101 JF Nov 10, 2005 8 CMSCMSCMS ininin UX5UX5UX5

CMS 101 JF Nov 10, 2005 9 CMSCMSCMS ininin thethethe CollisionCollisionCollision HallHallHall

CMS Detector assembled in SX5. 11 independent rings

CMS 101 JF Nov 10, 2005 10 HeavyHeavyHeavy LoweringLoweringLowering

Heavy lowering starts Feb 2006. 15 major lifts.

CMS 101 JF Nov 10, 2005 11 USCUSCUSC 555555

USC 55 for Channels for optical readout fibers from Detector electronics, trigger, voltages, services. Accessible during LHC operation

June 2004

CMS 101 JF Nov 10, 2005 12 USC55USC55USC55 VentilationVentilationVentilation SystemSystemSystem

Recent view

CMS 101 JF Nov 10, 2005 13 USC55USC55USC55 RelayRelayRelay RacksRacksRacks

USC55 Beneficial Occupancy (i.e. can install our crates) Feb 2005

CMS 101 JF Nov 10, 2005 14 SCX5SCX5SCX5 ControlControlControl RoomRoomRoom andandand ComputerComputerComputer FarmFarmFarm

CMS 101 JF Nov 10, 2005 15 SCX5SCX5SCX5 ControlControlControl RoomRoomRoom

CMS 101 JF Nov 10, 2005 16 MagnetMagnetMagnet CoilCoilCoil CompleteCompleteComplete

Magnet coil built vertically

Rotated and inserted into outer Vacuum tank

CB-1 coupled to CB-2 in SX5 CMS 101 JF Nov 10, 2005 17 YokeYokeYoke andandand VacuumVacuumVacuum TankTankTank

CMS 101 JF Nov 10, 2005 18 CoilCoilCoil SwivelingSwivelingSwiveling andandand InsertionInsertionInsertion

Happened in early September

CMS 101 JF Nov 10, 2005 19 CMSCMSCMS TrackerTrackerTracker

End cap –TEC- Outer Barrel –TOB-

Inner Barrel –TIB- Pixel Detector: Inner Disks –TID- ~45M pixels 2,4 m

m 5.4 Silicon Tracker 210 m2 of silicon sensors Support tube 6,136 Thin detectors (1 sensor) 9,096 Thick detectors (2 sensors)

CMS 101 JF Nov 10, 2005 10M channels 20 TrackerTrackerTracker InnerInnerInner Radius:Radius:Radius: PixelPixelPixel DetectorDetectorDetector (44M(44M(44M Channels)Channels)Channels) 3 barrel layers • r = 4.1 – 4.6 cm, 7.0 – 7.6 cm, 9.9 – 10.4 cm • ~ 32 x 106 pixels 2 pairs of Forward/Backward disks • Radial coverage 6 < r < 15 cm • Average z position: 34.5 cm, 46.5 cm • Per Disk: ~3 x 106 pixels ⇒ 3 high resolution space points for η < 2.2 Pixel size: 150 mm x 100 mm driven by FE Hit resolution: r-φσ~ 10 μm r-z σ ~ 17 μm CMS 101 JF Nov 10, 2005 21 SensorSensorSensor ConstructionConstructionConstruction

CMS 101 JF Nov 10, 2005 22 ComponentsComponentsComponents ofofof ForwardForwardForward PixPixPix

Plaquette (700, 5 types) Sensors Detector Unit (700)

Bump bonded

ROC (4,500) VHDI (700, 7) Blade, (100) Panels, (200)

P-4 TBM P-3

½ -Disk (8, 2 types)

HDI (4 types) Cooling channels, (100, 4)

D:\cms\aaa-www\6-assbly-blade-r.ppt CMS 101 JF Nov 10, 2005 23 ForwardForwardForward PixelPixelPixel MechanicsMechanicsMechanics andandand CoolingCoolingCooling ½ -Disks Forward Pixels

Prototype Service Cylinder Cooling Loop

Cooling Tube Alum. Brazed

CMS 101 JF Nov 10, 2005 24 ForwardForwardForward pixelpixelpixel DetectorDetectorDetector (mockup(mockup(mockup withwithwith 333 disks)disks)disks)

CMS 101 JF Nov 10, 2005 25 TheTheThe CMSCMSCMS SiliconSiliconSilicon StripStripStrip TrackerTrackerTracker Outer Barrel (TOB): 6 layers Endcap (TEC): 9 Disk pairs μ • Thick sensors (500 m) • r < 60 cm thin sensors •Long strips • r > 60 cm thick sensors Radius ~ 110cm, Lengthz view ~ 270cm η~1.7

6 layers TOB

η~2.4 4 layers TIB

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3 disks TID 9 disks TEC Inner Disks (TIB): 3 Disk pairs • Thin sensors Inner Barrel (TIB): 4 layers • Thin sensors (320 μm) • Short strips Strip length ranges from 10 cm in the inner layers to 20 cm in the outer layers. Pitch ranges from 80μm in the inner layers to near 200μm in the outer layers

CMS 101 JF Nov 10, 2005 26 TOBTOBTOB ModulesModulesModules

CFCF framesframes assembledassembled inin PakistanPakistan

500500 μμmm SensorsSensors fromfrom FullFull flexflex kaptonkapton HamamatsuHamamatsu circuitcircuit fromfrom CicorelCicorel andand HybridHybrid SASA

~20 cm

~5,600 Tracker Outer Barrel (TOB) modules • To be assembled and tested at FNAL & UCSB

CMS 101 JF Nov 10, 2005 27 TOBTOBTOB RodsRodsRods

• Rod assembly will be done in the SiDet Lab C clean room. • We receive rods with interconnect buses and interconnect cards from CERN. • A rod consists of 6 modules (12 for “double-sided” = back- to-back stereo and RPhi modules). Module Support Blocks Interconnect cards

Cooling pipe

Module Frame Interconnect bus

CMS 101 JF Nov 10, 2005 28 SiTrkSiTrkSiTrkProductionProduction Production StatusStatusStatus

CMS 101 JF Nov 10, 2005 29 TIBTIBTIB LayerLayerLayer 333 atatat FlorenceFlorenceFlorence

CMS 101 JF Nov 10, 2005 30 TIBTIBTIB LayersLayersLayers 2,2,2, 444 atatat PisaPisaPisa

CMS 101 JF Nov 10, 2005 31 TOBTOBTOB MechanicalMechanicalMechanical StructureStructureStructure

CMS 101 JF Nov 10, 2005 32 ECALECALECAL

61200 barrel 14648 crystals endcap crystals

CMS 101 JF Nov 10, 2005 33 PbWOPbWOPbWO44 CrystalsCrystalsCrystals forforfor ECALECALECAL

EE 5X5 “super crystal”

CMS 101 JF Nov 10, 2005 34 ECALECALECAL

CMS 101 JF Nov 10, 2005 35 ECALECALECAL OpticalOpticalOptical ReadoutReadoutReadout

CMS 101 JF Nov 10, 2005 36 TheTheThe firstfirstfirst CrystalCrystalCrystal SupermoduleSupermoduleSupermodule testedtestedtested ininin thethethe beambeambeam

CMS 101 JF Nov 10, 2005 37 EndCapEndCapEndCapPreshowerPreshower PreshowerDetectorDetector Detector

CMS 101 JF Nov 10, 2005 38 HCALHCALHCAL Had Barrel: HB Had Endcaps: HE Had Forward: HF Had Outer: HO

HF HE

CMS 101 JF Nov 10, 2005 39 CentralCentralCentral HadronHadronHadron CalorimeterCalorimeterCalorimeter HB,HE,HB,HE,HB,HE, HOHOHO

Scintillator + Wavelength Shifter Readout

Inserting scintillator into HB wedge

CMS 101 JF Nov 10, 2005 40 OpticalOpticalOptical DesignDesignDesign forforfor HCALHCALHCAL

Common Technology for HB, HE, HO

CMS 101 JF Nov 10, 2005 41 HCALHCALHCAL-Absorbers--AbsorbersAbsorbers CompleteCompleteComplete

CMS 101 JF Nov 10, 2005 42 HEHEHE RightRightRight NowNowNow

CMS 101 JF Nov 10, 2005 43 ForwardForwardForward HadronHadronHadron Calorimeter:Calorimeter:Calorimeter: HFHFHF To cope with high radiation levels (>1 5mm Grad accumulated in 10 years) the HAD (143 cm) active part is Quartz fibers: the energy measured through the Cerenkov light generated by shower particles.

EM (165 cm)

Iron calorimeter Covers 5 > η > 3 Total of 1728 towers, i.e. 2 x 432 towers for EM and HAD η x φ segmentation (0.175 x 0.175)

CMS 101 JF Nov 10, 2005 44 HFHFHF StatusStatusStatus

HF are first Items to be lowered in May 2006 Individual wedges Both ends assembled in Bat 186

CMS 101 JF Nov 10, 2005 45 MuonMuonMuon SystemSystemSystem

MB4

MB3

MB2

MB1

CMS 101 JF Nov 10, 2005 46 BarrelBarrel MuonMuon DTDT

42mm

Wire Electrode Strip 13 mm

Mylar Cathode Al Strips GAS: Ar/CO2 (85/15) Tmax: < 400 ns Drift Velocity : ~ 55μm/ns HV: Wires 3600 V Strips 1800 V Single Wire 100μm Φ I-beams -1200 V Resolution : < 300 μm 150μm θ

CMS 101 JF Nov 10, 2005 47 BarrelBarrel MuonMuon DTDT

60 MB1 3SL 2 RPC ~2.0 x 2.54 m2 960kg 60 MB2 3SL 2 RPC ~2.5 x 2.54 m2 1200kg 60 MB3 3SL 1 RPC ~3.0 x 2.54 m2 1300kg 5 4 3 2 6 2 40 MB4 2SL 1 RPC ~4.2 x 2.54 m 1800kg 1 10 MB1 2SL 1 RPC 7 10 MB2 2SL 1 RPC 12 8 10 MB3 2SL 1 RPC 11 9 10

Φ SL ΘSL Honeycomb Φ SL 4 layers = 1 Superlayer (SL)

The Barrel Muon system comprises 250 chambers for 5 wheels: Total 1700 SqM. Each Chamber has 2*4 Φ and 1*4 Θ layers

CMS 101 JF Nov 10, 2005 48 InstallationInstallation ofof DTDT chamberschambers

CMS 101 JF Nov 10, 2005 49 InstallationInstallation ofof DTDT chamberschambers YB+2YB+2

CMS 101 JF Nov 10, 2005 50 CathodeEndcapEndcapEndcap Strip MuonMuonMuon Chambers CSCCSCCSC

468 Cathode Strip Chambers

~2,000,000 wires ~6,000 m2 sensitive area

CMS 101 JF Nov 10, 2005 51 CMSCMS EndEnd CapCap CSCCSC

6 layers in each chamber Position resolution ~ 50 microns (from strips) Timing resolution better than 25ns (from wires)

CMS 101 JF Nov 10, 2005 52 EndcapEndcapEndcap CSCCSCCSC InstallationInstallationInstallation

468 chambers needed 100% tested and at CERN 67% installed 65% commissioned

CMS 101 JF Nov 10, 2005 53 CSCCSC onon YEYE

CMS 101 JF Nov 10, 2005 54 FirstFirst MuonMuon seenseen byby CMSCMS

Single muon track in one CSC

CMS 101 JF Nov 10, 2005 55 RPCRPCRPC

Resistive Plate Chamber (Used for CMS Muon Triggers)

Item CMS Requirements

Time Resolution ≤ 3 ns

Efficiency ≥ 95 %

Rate Capability ≥ 1 kHz/cm2

Intrinsic Noise Rate ≤ 15 Hz/cm2

Streamer Probability ≤ 10 %

HV Plateau ≥ 300 V

CMS 101 JF Nov 10, 2005 56 RPCRPCRPC

CMS 101 JF Nov 10, 2005 57 EndcapEndcapEndcap RPCRPCRPC

3.2 m

CMS 101 JF Nov 10, 2005 58 MagnetMagnetMagnet test:test:test: “““cosmiccosmiccosmic challengechallengechallenge””” FebFeb Feb 060606

ambitious integration test: issues: TK dummy tube -compatibility with basic programme of tests TK cosmic stack -special installations (or TIB +TEC -muon, rpc, hcal, ecal, trk detectors elements!!) -cabling & services (esp LV) -controls and safety -trigger Tracker -off-det electronics support -DAQ & Run Control -DAQ integration requires: -local DAQ (over VME) EB supermodule -FED Slink Common trigger (ad-hoc with LTC? -databases -data-structure/storage -analysis software etc etc etc

CMS 101 JF Nov 10, 2005 59 CommissioningCommissioningCommissioningCMSCMS CMS withwithwith CosmicsCosmicsCosmics(( (RightRightRight nownow now)))

CMS 101 JF Nov 10, 2005 60 LPCLPCLPC InvolvementInvolvementInvolvement withwithwith VerticalVerticalVertical SliceSliceSlice Remote Operations Center (ROC) to analyze calibration runs, alignment. Starts in December Large scale magnet test starts in Feb? Other LPC Involvement? Data Quality Monitoring: HCAL has person at LPC for this High Level event filtering “offline analysis”

CMS 101 JF Nov 10, 2005 61 ROCROCROC –––SuchSuch Such aaa goodgoodgood ideaideaidea CERNCERNCERN isisis makingmakingmaking oneoneone too!too!too!

CMS 101 JF Nov 10, 2005 62 SXSXSX schedule,schedule,schedule, draftdraftdraft revisionrevisionrevision v34.2v34.2v34.2

Cosmic Magnet Test Feb 06

CMS 101 JF Nov 10, 2005 63 V34.2V34.2V34.2 UXUXUX AssemblyAssemblyAssembly (+6W)(+6W)(+6W) 2005 2006 2007

Ready for beam Lower Major July 2007 Components HF Apr 06

Install EE/SE and pixels Commissioning after pilot run and pilot run

CMS 101 JF Nov 10, 2005 64 SomeSomeSome ReferenceReferenceReference TalksTalksTalks

Pixel Detector http://agenda.cern.ch/askArchive.php?base=agenda&categ=a 054217&id=a054217s1t1/transparencies

Tracker http://eps2003.physik.rwth- aachen.de/data/talks/parallel/14Detectors/14Tricomi.ppt

ECAL http://agenda.cern.ch/askArchive.php?base=agenda&categ=a035690 &id=a035690s9t1%2Fmoreinfo%2FCamporesi.ppt

HCAL http://uscms.fnal.gov/users/freeman/Elba%20Talk%20May%2024.ppt

Muon http://eps2003.physik.rwth- aachen.de/data/talks/parallel/14Detectors/14Cerrada02.ppt

CMS 101 JF Nov 10, 2005 65