The ATLAS Detector at the Large Hadron Collider - University of ...
The ATLAS Detector at the Large Hadron Collider - University of ...
The ATLAS Detector at the Large Hadron Collider - University of ...
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<strong>The</strong> <strong>ATLAS</strong> <strong>Detector</strong> <strong>at</strong> <strong>the</strong> <strong>Large</strong> <strong>Hadron</strong> <strong>Collider</strong><br />
Peter Krieger IPP/<strong>University</strong> <strong>of</strong> Toronto
<strong>The</strong> <strong>ATLAS</strong> <strong>Detector</strong> <strong>at</strong> <strong>the</strong> <strong>Large</strong> <strong>Hadron</strong> <strong>Collider</strong><br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 2
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 3<br />
<strong>The</strong> <strong>ATLAS</strong> Canada Collabor<strong>at</strong>ion<br />
Alberta<br />
Carleton<br />
Montreal<br />
Simon Fraser<br />
Toronto<br />
TRIUMF<br />
UBC<br />
Victoria<br />
York<br />
this talk + calorimeter testbeams<br />
Focus on Liquid Argon Calorimetry<br />
Four NSERC funded projects:<br />
<strong>Hadron</strong>ic Endcap Calorimeter<br />
<strong>Hadron</strong>ic Forward Calorimeter<br />
Endcap Signal Cryogenic Feedthroughs<br />
Front-End Board Electronics<br />
32 <strong>University</strong>/Lab Physicists<br />
80 People, including engineers,<br />
technicians and students<br />
Educ<strong>at</strong>ional Role<br />
20 Undergradu<strong>at</strong>e students<br />
25 Gradu<strong>at</strong>e Students<br />
16 Postdocs<br />
O<strong>the</strong>r Important Activities<br />
Radi<strong>at</strong>ion Hardness Studies<br />
Physics Studies<br />
Event Filter Processor Farm<br />
<strong>ATLAS</strong> Computing<br />
Pixel Testing and Assembly
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 4<br />
<strong>ATLAS</strong> Canada NSERC-funded Construction Projects<br />
<strong>Hadron</strong>ic Endcap<br />
Calorimeter Wheels<br />
Cryogenic<br />
feedthroughs<br />
<strong>Hadron</strong>ic Forward<br />
Calorimeter Modules<br />
Liquid Argon<br />
Front-End Electronics
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 5<br />
<strong>The</strong> <strong>Large</strong> <strong>Hadron</strong> <strong>Collider</strong> <strong>at</strong> CERN<br />
proton-proton collider being installed in existing 27km circumference<br />
LEP ring <strong>at</strong> CERN in Geneva Switzerland<br />
‣ pp centre-<strong>of</strong>-mass energy <strong>of</strong> 14 TeV<br />
‣ constituent centre-<strong>of</strong>-mass energies ~ 1-2 TeV<br />
‣ L = 10 33 cm -2 /s (low luminosity)<br />
10 34 cm -2 /s (high luminosity)<br />
‣ proton bunch spacing <strong>of</strong> 25 ns (40 MHz collision frequency)<br />
Physics Goals: wh<strong>at</strong>ever TeV scale physics is <strong>the</strong>re to be discovered<br />
• Higgs boson<br />
• Supersymmetry<br />
• <strong>Large</strong> extra dimensions<br />
• Extended gauge <strong>the</strong>ories<br />
• Compositeness<br />
• B Physics (oscill<strong>at</strong>ions, CP viol<strong>at</strong>ion)
<strong>The</strong> <strong>Large</strong> <strong>Hadron</strong> <strong>Collider</strong> <strong>at</strong> CERN<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 6
<strong>The</strong> <strong>ATLAS</strong> Cavern<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 7
<strong>The</strong> <strong>ATLAS</strong> Cavern, 1 Year Ago Today<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 8
<strong>The</strong> <strong>ATLAS</strong> Cavern June 7, 2004<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 9
<strong>The</strong> <strong>ATLAS</strong> Calorimeters<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 10
<strong>ATLAS</strong> Barrel Cryost<strong>at</strong>: Solenoid Insertion<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 11
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 12<br />
Endcap Signal Cryogenic Feedthroughs<br />
<strong>ATLAS</strong> liquid argon calorimetry has over 180k signal<br />
channels which must come through <strong>the</strong> walls <strong>of</strong> <strong>the</strong><br />
cryost<strong>at</strong>s<br />
Each feedthrough unit carries 1920 electrical<br />
channels.<br />
Barrel: 64 feedthrough units (+spares)<br />
Endcap: 50 feedthrough units total (+5 spares)
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 13<br />
Feedthrough Install<strong>at</strong>ion and Testing Complete<br />
Feedthrough construction in Victoria completed October 2002<br />
Endcap C feedthrough install<strong>at</strong>ion completed January 2003<br />
Endcap C cabling and electrical testing completed April 2003<br />
Endcap A feedthrough install<strong>at</strong>ion completed Sept 2003<br />
Endcap A warm cabling and electrical testing completed October 2003<br />
Endcap A: all feedthroughs welded 26/09/03<br />
Endcap A feedthrough electrical testing
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 14<br />
Liquid Argon FEB Electronics<br />
<strong>ATLAS</strong> Canada responsibilties:<br />
All Switched Capacitor Array Controllers<br />
All o<strong>the</strong>r deep sub-micron chips<br />
gain-selectors<br />
clock fanout
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 15<br />
Liquid Argon FEB Electronics<br />
SCA Controller<br />
SCA<br />
All chips have been<br />
delivered and await<br />
FEB construction:<br />
To start ~ July 2004
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 16<br />
HEC Module Production<br />
32 modules / wheel<br />
Modules<br />
160.00<br />
140.00<br />
120.00<br />
100.00<br />
80.00<br />
60.00<br />
40.00<br />
20.00<br />
HEC Module Production<br />
Finished <strong>at</strong> Institutes<br />
Cold tested<br />
Projected Finished<br />
Projected Cold Tested<br />
0.00<br />
Feb-00<br />
Jun-00<br />
Oct-00<br />
Feb-01<br />
Jun-01<br />
Oct-01<br />
Feb-02<br />
D<strong>at</strong>e<br />
Jun-02<br />
Oct-02<br />
Feb-03<br />
Jun-03<br />
Oct-03<br />
Module Production Completed<br />
Coldtesting completed Fall 2003<br />
HEC Wheel construction completed<br />
Construction <strong>of</strong> special modules for combined testbeam completed
HEC Wheel Assembly Procedure<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 17<br />
Wheel assembly on Assembly Table<br />
Wheel rot<strong>at</strong>ion with Rot<strong>at</strong>or<br />
Wheel Storage on T6/T6A<br />
Wheel Insertion into Endcap Cryost<strong>at</strong>
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 18
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 19
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 20
HEC 1C and 2C Modules on T6A Tooling<br />
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Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 22<br />
HEC Insertion Endcap C<br />
HEC wheel 1 insertion HEC wheel 2 insertion<br />
EMEC<br />
HEC1
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Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 24
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 25<br />
<strong>The</strong> Endcap Calorimeter System<br />
R [cm]<br />
60<br />
50<br />
40<br />
elm EndCap<br />
had EndCap<br />
(front)<br />
had EndCap<br />
(back)<br />
30<br />
20<br />
10<br />
0<br />
Poly shield<br />
pumps<br />
FCal I FCal II FCal III<br />
(elm) (had) (had)<br />
Cu shielding<br />
350 400 450 500 550 600 650<br />
Z [cm]
Endcap C Forward Calorimeter<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 26
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 27<br />
FCal Insertion Into Endcap Cryost<strong>at</strong><br />
cryost<strong>at</strong> cold cover
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 28<br />
Forward Calorimeter Construction St<strong>at</strong>us<br />
FCal module construction completed May 2003<br />
FCal calibr<strong>at</strong>ion testbeam (using C end modules) Summer 2003<br />
FCal C final assembly completed Fall 2003<br />
FCal C integr<strong>at</strong>ion into Endcap C cryost<strong>at</strong> scheduled for l<strong>at</strong>er this year<br />
FCal A module coldtesting completed January 2004<br />
FCal A final assembly scheduled for l<strong>at</strong>er this year<br />
FCal Module0 refurbishing for endcap combined testbeam finished Fall 2003
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 29<br />
Module Alignment: FCalC Final Assembly<br />
FCal1 FCal2 FCal3
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 30<br />
FCalC Prior to Cable Dressing<br />
FCal support tube<br />
Brass Plug<br />
Shielding
FCalC Cold-cable Dressing<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 31
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 32<br />
FCalC Cold-cable dressing<br />
FCal1 FCal2 FCal3
FCal Cable Dressing Nears Completion<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 33
FCal Kapton Wrap / Ready for Insertion<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 34
Insertion into Cold Tube Begins<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 35
Insertion Almost Complete (3cm left)<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 36
Endcap C Forward Calorimeter<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 37
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 38<br />
Liquid Argon Calorimeter Testbeams<br />
‣ Measure initial <strong>ATLAS</strong> calibr<strong>at</strong>ion constants<br />
essential for good “day 1” performance<br />
<strong>of</strong>ten superceded l<strong>at</strong>er (usually requires tracking inform<strong>at</strong>ion)<br />
no tracking in front <strong>of</strong> FCal, so testbeam calibr<strong>at</strong>ion particularly important<br />
‣ Calibr<strong>at</strong>ion “crack” region (transition from EMEC/HEC to FCal: η ≈ 3.2<br />
Important for understanding calorimeter intercalibr<strong>at</strong>ions (energy sharing)<br />
Important for dead-m<strong>at</strong>erial corrections (tune MC using testbeam d<strong>at</strong>a)<br />
HEC/EMEC Combined Testbeam 2002<br />
FCAL Calibr<strong>at</strong>ion Testbeam 2003<br />
HEC/EMEC/FCal Combined Testbeam 2004
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 39<br />
HEC/EMEC Combined Testbeam 2002<br />
σ’(E reco ) / E reco<br />
0.5<br />
D<strong>at</strong>a π-<br />
0.4<br />
D<strong>at</strong>a π +<br />
0.3<br />
Geant3<br />
0.2<br />
G4 LHEP<br />
G4 QGSP<br />
0.1<br />
0.07<br />
0.06<br />
0.05<br />
0 50 100 150 200<br />
E beam (GeV)<br />
HEC2<br />
HEC1<br />
EMEC<br />
NIM Draft exists
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 40<br />
FCal Calibr<strong>at</strong>ion Testbeam Summer 2003<br />
Placement:2.5° rot<strong>at</strong>ion, 100mm <strong>of</strong>fset<br />
Cryost<strong>at</strong> Rot<strong>at</strong>ion: 0°<br />
0°<br />
1°<br />
2°<br />
3°<br />
4°<br />
Impact angle: 2.5°<br />
Impact angles adjusted<br />
to simul<strong>at</strong>e beam from<br />
interaction point<br />
H1 cryost<strong>at</strong> in H6 beamline <strong>at</strong> CERN<br />
e, π, μ 10-200 GeV from CERN SPS
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 41<br />
Module Package Orient<strong>at</strong>ion for Calibr<strong>at</strong>ion Testbeam<br />
FCal1 FCal2 FCal3<br />
Evacu<strong>at</strong>ed “beam pipe”
FCal Package for Calibr<strong>at</strong>ion Testbeam<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 42
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 43<br />
Forward Calorimeter Calibr<strong>at</strong>ion Testbeam<br />
Not enough cable harnesses / electronics available for readout <strong>of</strong> all channels.<br />
7 pigtails<br />
5 pigtails<br />
4 regular SBs<br />
2 regular SBs<br />
3 special SBs 3 special SBs<br />
4 pigtails<br />
4 regular SBs<br />
FCAL1 FCAL2 FCAL3
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 44<br />
FCal Calibr<strong>at</strong>ion Testbeam Beam Impact Positions<br />
Beam hole<br />
Simul<strong>at</strong>ed cryost<strong>at</strong> bulkhead<br />
Energy Scan D<strong>at</strong>a Points<br />
5 GeV electrons<br />
10 GeV electrons, pions<br />
20 GeV electrons, pions<br />
40 GeV electrons, pions<br />
60 GeV electrons, pions<br />
80 GeV electrons, pions<br />
100 GeV electrons, pions<br />
150 GeV electrons, pions<br />
200 GeV electrons, pions, µ<br />
Beam spots for edge scan<br />
(only <strong>at</strong> 200 GeV)<br />
Beam spots for calibr<strong>at</strong>ion (energy scan)<br />
FCal outer edge
Forward Calorimeter/electron event display<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 45<br />
FCal1 : Single electron 200 GeV/c
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 46<br />
Energy Deposits in FCal1, 2, and 3 due to 200 GeV π’s<br />
Accumul<strong>at</strong>ed over<br />
multiple π events<br />
FCal1<br />
FCal2<br />
FCal3
Energy reconstruction for electrons<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 47<br />
Energy reconstruction for electrons:<br />
• Sum over whole calorimeter (add noise from channels with no signal)<br />
• Sum over channels within some radius <strong>of</strong> a seed channel<br />
193.1 GeV
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 48<br />
FCal Electron Response 10, 20 and 40 GeV<br />
Beam particle selection criteria (here to elimin<strong>at</strong>e pions) preliminary
Electron and pion linearity: Very Preliminary……..<br />
Electrons and Pions <strong>at</strong> Position 4L - Fit Electrons<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 49
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 50<br />
FCal Calibr<strong>at</strong>ion Testbeam: Electron Energy Resolution<br />
σ/E (%)<br />
σ/E<br />
b<br />
= a ⊕ ⊕<br />
E<br />
c<br />
E<br />
a=(3.76±0.06)%,<br />
b=(24.5±0.84)√GeV %,<br />
c=(145.5±1.6) GeV%<br />
Analysis <strong>of</strong> pion results in progress<br />
E (GeV)
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 51<br />
Endcap Combined Testbeam HEC/EMEC/FCal<br />
R [cm]<br />
60<br />
50<br />
40<br />
elm EndCap<br />
had EndCap<br />
(front)<br />
had EndCap<br />
(back)<br />
η=3.2<br />
30<br />
20<br />
10<br />
0<br />
Poly shield<br />
pumps<br />
FCal I FCal II FCal III<br />
(elm) (had) (had)<br />
Cu shielding<br />
350 400 450 500 550 600 650<br />
Z [cm]<br />
Intercalibr<strong>at</strong>ion <strong>of</strong> endcap calorimeters<br />
Corrections for energy losses in dead m<strong>at</strong>erial (tune simul<strong>at</strong>ion to testbeam results)
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 52<br />
HEC/EMEC FCAL Combined Testbeam<br />
EMEC+HEC+FCAL Setup<br />
M<strong>at</strong>erial studies<br />
Special HEC mini-Modules<br />
EMEC Mod0<br />
Cold tailc<strong>at</strong>cher<br />
FCal1/2 Mod0
Set-up for η=3.2 Beam Test<br />
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 53<br />
Lifting Tool for Complete Setup<br />
Lifting Tool for<br />
HEC1 or HEC2<br />
EMEC<br />
FCAL<br />
FCAL Frame
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 54
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 55<br />
Endcap Combined Testbeam Setup<br />
simul<strong>at</strong>ed FCal<br />
coldtube wall<br />
Front-End<br />
Cr<strong>at</strong>e<br />
Cold<br />
Tailc<strong>at</strong>cher<br />
feedthrough<br />
H1 cryost<strong>at</strong><br />
FCal1, FCal2, EMEC Modules not visible
Peter Krieger IPP/Toronto CAP Congress, Winnipeg 2004 56<br />
Summary<br />
• <strong>ATLAS</strong> Canada construction projects nearing successful completion<br />
– <strong>Hadron</strong>ic Endcap Calorimeter<br />
– <strong>Hadron</strong>ic Forward Calorimeter<br />
– Liquid Argon Cryogenic Signal Feedthroughs<br />
– Liquid Argon Front-End Electronics<br />
• O<strong>the</strong>r efforts underway<br />
– Event Filter<br />
– <strong>ATLAS</strong> computing / D<strong>at</strong>a challenges<br />
– Radi<strong>at</strong>ion Studies<br />
– <strong>ATLAS</strong> pixels<br />
• <strong>Detector</strong> integr<strong>at</strong>ion / install<strong>at</strong>ion is proceeding well<br />
• Testbeam programs have been very successful<br />
– NIM draft <strong>of</strong> 2002 testbeam (HEC/EMEC) exists<br />
– Analysis <strong>of</strong> FCal calibr<strong>at</strong>ion testbeam d<strong>at</strong>a analysis continues<br />
– Combined testbeam currently underway<br />
…… and <strong>of</strong> course we all look forward to first d<strong>at</strong>a taking in 2007 !
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