The ATLAS Detector at the Large Hadron Collider. Peter Krieger IPP/University of Toronto
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1 The ATLAS Detector at the Large Hadron Collider Peter Krieger IPP/University of Toronto
2 The ATLAS Detector at the Large Hadron Collider Peter Krieger IPP/Toronto CAP Congress, Winnipeg
3 Peter Krieger IPP/Toronto CAP Congress, Winnipeg The ATLAS Canada Collaboration Alberta Carleton Montreal Simon Fraser Toronto TRIUMF UBC Victoria York this talk + calorimeter testbeams Focus on Liquid Argon Calorimetry Four NSERC funded projects: Hadronic Endcap Calorimeter Hadronic Forward Calorimeter Endcap Signal Cryogenic Feedthroughs Front-End Board Electronics 32 University/Lab Physicists 80 People, including engineers, technicians and students Educational Role 20 Undergraduate students 25 Graduate Students 16 Postdocs Other Important Activities Radiation Hardness Studies Physics Studies Event Filter Processor Farm ATLAS Computing Pixel Testing and Assembly
4 Peter Krieger IPP/Toronto CAP Congress, Winnipeg ATLAS Canada NSERC-funded Construction Projects Hadronic Endcap Calorimeter Wheels Cryogenic feedthroughs Hadronic Forward Calorimeter Modules Liquid Argon Front-End Electronics
5 Peter Krieger IPP/Toronto CAP Congress, Winnipeg The Large Hadron Collider at CERN proton-proton collider being installed in existing 27km circumference LEP ring at CERN in Geneva Switzerland pp centre-of-mass energy of 14 TeV constituent centre-of-mass energies ~ 1-2 TeV L = cm -2 /s (low luminosity) cm -2 /s (high luminosity) proton bunch spacing of 25 ns (40 MHz collision frequency) Physics Goals: whatever TeV scale physics is there to be discovered Higgs boson Supersymmetry Large extra dimensions Extended gauge theories Compositeness B Physics (oscillations, CP violation)
6 The Large Hadron Collider at CERN Peter Krieger IPP/Toronto CAP Congress, Winnipeg
7 The ATLAS Cavern Peter Krieger IPP/Toronto CAP Congress, Winnipeg
8 The ATLAS Cavern, 1 Year Ago Today Peter Krieger IPP/Toronto CAP Congress, Winnipeg
9 The ATLAS Cavern June 7, 2004 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
10 The ATLAS Calorimeters Peter Krieger IPP/Toronto CAP Congress, Winnipeg
11 ATLAS Barrel Cryostat: Solenoid Insertion Peter Krieger IPP/Toronto CAP Congress, Winnipeg
12 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Endcap Signal Cryogenic Feedthroughs ATLAS liquid argon calorimetry has over 180k signal channels which must come through the walls of the cryostats Each feedthrough unit carries 1920 electrical channels. Barrel: 64 feedthrough units (+spares) Endcap: 50 feedthrough units total (+5 spares)
13 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Feedthrough Installation and Testing Complete Feedthrough construction in Victoria completed October 2002 Endcap C feedthrough installation completed January 2003 Endcap C cabling and electrical testing completed April 2003 Endcap A feedthrough installation completed Sept 2003 Endcap A warm cabling and electrical testing completed October 2003 Endcap A: all feedthroughs welded 26/09/03 Endcap A feedthrough electrical testing
14 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Liquid Argon FEB Electronics ATLAS Canada responsibilties: All Switched Capacitor Array Controllers All other deep sub-micron chips gain-selectors clock fanout
15 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Liquid Argon FEB Electronics SCA Controller SCA All chips have been delivered and await FEB construction: To start ~ July 2004
16 Peter Krieger IPP/Toronto CAP Congress, Winnipeg HEC Module Production 32 modules / wheel Modules HEC Module Production Finished at Institutes Cold tested Projected Finished Projected Cold Tested 0.00 Feb-00 Jun-00 Oct-00 Feb-01 Jun-01 Oct-01 Feb-02 Date Jun-02 Oct-02 Feb-03 Jun-03 Oct-03 Module Production Completed Coldtesting completed Fall 2003 HEC Wheel construction completed Construction of special modules for combined testbeam completed
17 HEC Wheel Assembly Procedure Peter Krieger IPP/Toronto CAP Congress, Winnipeg Wheel assembly on Assembly Table Wheel rotation with Rotator Wheel Storage on T6/T6A Wheel Insertion into Endcap Cryostat
18 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
19 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
20 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
21 HEC 1C and 2C Modules on T6A Tooling Peter Krieger IPP/Toronto CAP Congress, Winnipeg
22 Peter Krieger IPP/Toronto CAP Congress, Winnipeg HEC Insertion Endcap C HEC wheel 1 insertion HEC wheel 2 insertion EMEC HEC1
23 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
24 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
25 Peter Krieger IPP/Toronto CAP Congress, Winnipeg The Endcap Calorimeter System R [cm] elm EndCap had EndCap (front) had EndCap (back) Poly shield pumps FCal I FCal II FCal III (elm) (had) (had) Cu shielding Z [cm]
26 Endcap C Forward Calorimeter Peter Krieger IPP/Toronto CAP Congress, Winnipeg
27 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCal Insertion Into Endcap Cryostat cryostat cold cover
28 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Forward Calorimeter Construction Status FCal module construction completed May 2003 FCal calibration testbeam (using C end modules) Summer 2003 FCal C final assembly completed Fall 2003 FCal C integration into Endcap C cryostat scheduled for later this year FCal A module coldtesting completed January 2004 FCal A final assembly scheduled for later this year FCal Module0 refurbishing for endcap combined testbeam finished Fall 2003
29 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Module Alignment: FCalC Final Assembly FCal1 FCal2 FCal3
30 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCalC Prior to Cable Dressing FCal support tube Brass Plug Shielding
31 FCalC Cold-cable Dressing Peter Krieger IPP/Toronto CAP Congress, Winnipeg
32 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCalC Cold-cable dressing FCal1 FCal2 FCal3
33 FCal Cable Dressing Nears Completion Peter Krieger IPP/Toronto CAP Congress, Winnipeg
34 FCal Kapton Wrap / Ready for Insertion Peter Krieger IPP/Toronto CAP Congress, Winnipeg
35 Insertion into Cold Tube Begins Peter Krieger IPP/Toronto CAP Congress, Winnipeg
36 Insertion Almost Complete (3cm left) Peter Krieger IPP/Toronto CAP Congress, Winnipeg
37 Endcap C Forward Calorimeter Peter Krieger IPP/Toronto CAP Congress, Winnipeg
38 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Liquid Argon Calorimeter Testbeams Measure initial ATLAS calibration constants essential for good day 1 performance often superceded later (usually requires tracking information) no tracking in front of FCal, so testbeam calibration particularly important Calibration crack region (transition from EMEC/HEC to FCal: η 3.2 Important for understanding calorimeter intercalibrations (energy sharing) Important for dead-material corrections (tune MC using testbeam data) HEC/EMEC Combined Testbeam 2002 FCAL Calibration Testbeam 2003 HEC/EMEC/FCal Combined Testbeam 2004
39 Peter Krieger IPP/Toronto CAP Congress, Winnipeg HEC/EMEC Combined Testbeam 2002 σ (E reco ) / E reco 0.5 Data π- 0.4 Data π Geant3 0.2 G4 LHEP G4 QGSP E beam (GeV) HEC2 HEC1 EMEC NIM Draft exists
40 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCal Calibration Testbeam Summer 2003 Placement:2.5 rotation, 100mm offset Cryostat Rotation: Impact angle: 2.5 Impact angles adjusted to simulate beam from interaction point H1 cryostat in H6 beamline at CERN e, π, μ GeV from CERN SPS
41 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Module Package Orientation for Calibration Testbeam FCal1 FCal2 FCal3 Evacuated beam pipe
42 FCal Package for Calibration Testbeam Peter Krieger IPP/Toronto CAP Congress, Winnipeg
43 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Forward Calorimeter Calibration Testbeam Not enough cable harnesses / electronics available for readout of all channels. 7 pigtails 5 pigtails 4 regular SBs 2 regular SBs 3 special SBs 3 special SBs 4 pigtails 4 regular SBs FCAL1 FCAL2 FCAL3
44 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCal Calibration Testbeam Beam Impact Positions Beam hole Simulated cryostat bulkhead Energy Scan Data Points 5 GeV electrons 10 GeV electrons, pions 20 GeV electrons, pions 40 GeV electrons, pions 60 GeV electrons, pions 80 GeV electrons, pions 100 GeV electrons, pions 150 GeV electrons, pions 200 GeV electrons, pions, µ Beam spots for edge scan (only at 200 GeV) Beam spots for calibration (energy scan) FCal outer edge
45 Forward Calorimeter/electron event display Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCal1 : Single electron 200 GeV/c
46 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Energy Deposits in FCal1, 2, and 3 due to 200 GeV π s Accumulated over multiple π events FCal1 FCal2 FCal3
47 Energy reconstruction for electrons Peter Krieger IPP/Toronto CAP Congress, Winnipeg Energy reconstruction for electrons: Sum over whole calorimeter (add noise from channels with no signal) Sum over channels within some radius of a seed channel GeV
48 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCal Electron Response 10, 20 and 40 GeV Beam particle selection criteria (here to eliminate pions) preliminary
49 Electron and pion linearity: Very Preliminary.. Electrons and Pions at Position 4L - Fit Electrons Peter Krieger IPP/Toronto CAP Congress, Winnipeg
50 Peter Krieger IPP/Toronto CAP Congress, Winnipeg FCal Calibration Testbeam: Electron Energy Resolution σ/e (%) σ/e b = a E c E a=(3.76±0.06)%, b=(24.5±0.84) GeV %, c=(145.5±1.6) GeV% Analysis of pion results in progress E (GeV)
51 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Endcap Combined Testbeam HEC/EMEC/FCal R [cm] elm EndCap had EndCap (front) had EndCap (back) η= Poly shield pumps FCal I FCal II FCal III (elm) (had) (had) Cu shielding Z [cm] Intercalibration of endcap calorimeters Corrections for energy losses in dead material (tune simulation to testbeam results)
52 Peter Krieger IPP/Toronto CAP Congress, Winnipeg HEC/EMEC FCAL Combined Testbeam EMEC+HEC+FCAL Setup Material studies Special HEC mini-modules EMEC Mod0 Cold tailcatcher FCal1/2 Mod0
53 Set-up for η=3.2 Beam Test Peter Krieger IPP/Toronto CAP Congress, Winnipeg Lifting Tool for Complete Setup Lifting Tool for HEC1 or HEC2 EMEC FCAL FCAL Frame
54 Peter Krieger IPP/Toronto CAP Congress, Winnipeg
55 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Endcap Combined Testbeam Setup simulated FCal coldtube wall Front-End Crate Cold Tailcatcher feedthrough H1 cryostat FCal1, FCal2, EMEC Modules not visible
56 Peter Krieger IPP/Toronto CAP Congress, Winnipeg Summary ATLAS Canada construction projects nearing successful completion Hadronic Endcap Calorimeter Hadronic Forward Calorimeter Liquid Argon Cryogenic Signal Feedthroughs Liquid Argon Front-End Electronics Other efforts underway Event Filter ATLAS computing / Data challenges Radiation Studies ATLAS pixels Detector integration / installation is proceeding well Testbeam programs have been very successful NIM draft of 2002 testbeam (HEC/EMEC) exists Analysis of FCal calibration testbeam data analysis continues Combined testbeam currently underway and of course we all look forward to first data taking in 2007!
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