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University of Roma “Tor Vergata” ATLAS The ATLAS Muon Spectrometer Anna Di Ciaccio University of Roma “Tor Vergata” and INFN on behalf of the ATLAS experiment 7 th International Conference on : Advanced Technology and Particle Physics ( Villa Olmo, Como 15-19 October 2001)

The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

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Page 1: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

University of Roma

“Tor Vergata”

ATLAS

The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer

Anna Di Ciaccio University of Roma “Tor Vergata” and INFN

on behalf of the

ATLAS experiment

Anna Di Ciaccio University of Roma “Tor Vergata” and INFN

on behalf of the

ATLAS experiment

7th International Conference on :

Advanced Technology and Particle Physics

( Villa Olmo, Como 15-19 October 2001)

Page 2: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20012

ATLASUniversity of Roma

“Tor Vergata” OutlineOutline

! The ATLAS muon spectrometer! The physics performance! The muon detectors and the status of the mass

production " Monitored Drift Tubes Chambers (MDT)(*)

" Cathode Strip Chambers (CSC)" Resistive Plate Chambers (RPC)" Thin Gap Chambers (TGC)

! Conclusions(*) Talk of A.Marin

Page 3: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20013

ATLASUniversity of Roma

“Tor Vergata” The ATLAS experiment at LHCThe ATLAS experiment at LHC

ATLAS dimensionsWidth: 44 m

Diameter: 21 m

Weight: 7000 t

ATLAS dimensionsWidth: 44 m

Diameter: 21 m

Weight: 7000 t

Page 4: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20014

ATLASUniversity of Roma

“Tor Vergata” The muon spectrometerThe muon spectrometer

ATLAS high resolution stand-alone µµµµ spectrometer features: # Three large super-conducting air-core toroids equipped with gas

detectors to perform independently:! µµµµ high-precision tracking

• MDT at |ηηηη| < 2 • CSC at 2 < |ηηηη| < 2.7

! µµµµ pt trigger selection! bunch-crossing identification ( requires very good time resolution)! µµµµ second coordinate measurements

• RPC at |ηηηη| < 1.05• TGC at 1.05 < |ηηηη| < 2.4

Page 5: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20015

ATLASUniversity of Roma

“Tor Vergata” Barrel Muon SpectrometerBarrel Muon Spectrometer

Tree µ µ µ µ measurement stations

•Rmin = 5 m

•Rmiddle= 7.5 m

•Rmax= 10 m

Tree µ µ µ µ measurement stations

•Rmin = 5 m

•Rmiddle= 7.5 m

•Rmax= 10 m

Barrel detectorsMDT chambers

RPC chambers only in middle and outer stations

Barrel detectorsMDT chambers

RPC chambers only in middle and outer stations

Page 6: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20016

ATLASUniversity of Roma

“Tor Vergata” Muon SpectrometerMuon Spectrometer

End-cap ToroidsEnd-cap Toroids

Barrel ToroidBarrel Toroid Forward detectors

MDT chambers

CSC chambers

TGC chambers

Forward detectors

MDT chambers

CSC chambers

TGC chambers

Barrel Toroid B0 prototype

Barrel Toroid B0 prototype

Page 7: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20017

ATLASUniversity of Roma

“Tor Vergata” Spectrometer magnetsSpectrometer magnets

Campo magnetico

eta 0 2.7

0 2.7pseudorapidity

Field integral

Two end-cap magnets

1.4 < |ηηηη| < 2.7

Two end-cap magnets

1.4 < |ηηηη| < 2.7

8 coils barrel magnet |ηηηη| < 1

8 coils barrel magnet |ηηηη| < 1

•Large field volume

•Strong bending power

•Light and open structure

•Large field volume

•Strong bending power

•Light and open structure

Page 8: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20018

ATLASUniversity of Roma

“Tor Vergata” The muon measurement schemeThe muon measurement scheme

Trigger chambers and 2nd coordinateTrigger chambers and 2nd coordinate

Precision Measurements in 3 locations in the bending planePrecision Measurements in 3 locations in the bending plane

µµµµ µµµµ

µµµµ

Page 9: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 20019

ATLASUniversity of Roma

“Tor Vergata” Spectrometer performanceSpectrometer performance

Mass resolution:

1.6% @ 100 GeV

2.6% @ 800 geV

Mass resolution:

1.6% @ 100 GeV

2.6% @ 800 geV

Momentum resolution for |ηηηη| < 1.05:

2% @ 100 GeV

8% @ 1 TeV

Momentum resolution for |ηηηη| < 1.05:

2% @ 100 GeV

8% @ 1 TeV

Page 10: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200110

ATLASUniversity of Roma

“Tor Vergata”

Mass production for MDT, RPC, TGC started

- 2004 : end production2004 - 2005 : installations

2006 : first collisions

Precision chambers Trigger chambers

Number of chambers Number of channels Area covered (m 2)

Precision chambers Trigger chambers

Number of chambers Number of channels Area covered (m 2)

CSC

3231,000

27

MDT

1,163370,000

5,500

RPC

1,136385,000

3,650

TGC

1,584322,000

2,900

Muon Chambers mass productionMuon Chambers mass production

Page 11: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200111

ATLASUniversity of Roma

“Tor Vergata”

MDTMDT

RPCRPC TGCTGC

CSC CSC

Muon detectors Muon detectors

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A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200112

ATLASUniversity of Roma

“Tor Vergata” Precision chambers Precision chambers

Technologies:

•Monitored Drift Tubes (MDT) (|ηηηη| < 2)

•Cathode Strip Chambers (CSC) (2 < |ηηηη| < 2.7)

Technologies:

•Monitored Drift Tubes (MDT) (|ηηηη| < 2)

•Cathode Strip Chambers (CSC) (2 < |ηηηη| < 2.7)

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A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200113

ATLASUniversity of Roma

“Tor Vergata”

0

200

400600

800

1000

1200

-0.4 -0.2 0 0.2 0.4residuals (mm)

num

ber

Tube resolution = 81μμμμm

BMC Cosmic ray test(EIL module-0)

MDT chambers MDT chambers

Tube: Al, 30 mm φφφφ, 0.4 mm wallWire : 50 μμμμm, W/Re alloy (97/3)Gas : Ar/CO2 (93%/7%) at 3 barGas gain : 2x104 at 3.1KV

2 multilayers of 3 or 4 monolayers

Page 14: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

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“Tor Vergata”

BML

BIL

H8 test beamH8 test beamAlignment, integration and performance test

Time spectrum (ns)

BML events BIL events

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ATLASUniversity of Roma

“Tor Vergata” MDTs production statusMDTs production statusMDT Production sitesStatus 30 September 2001 tubes module-0 bare chambersGreece - BIS 8,700 2 26Boston - EI, EM 8,230 1 21Univ. Michigan - EM 9,800 1 23Univ. Washington - EI, EM 9,700 1 23Dubna/Munich - BOS/BOF 10,800 1 12Frascati - BML 4,550 1 8Cosenza/Roma - BIL/BIR 2,150 1 3Dubna - BMS 2,700 1 1Protvino - EO 7,000 1 5Nikhef - BOL 2,500 1 3Cosenza, Pavia - BIL/BIR 2,100 1 1Freiburg - BOG 0 0 0Beijing - BEE, BIS8 0 0 0Sum 68,230 12 126Fraction produced 18.4% 10.8%

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A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200116

ATLASUniversity of Roma

“Tor Vergata” Cathode strip chambersCathode strip chambers

CSC:MWPC with cathode strip readout(BNL,Stony Brook,UC Irvine)

Gas gap : 5.08 mmAnode wire pitch : 2.54 mmCathode read-out pitch: 5.08mmMaximum drift time: 30nsGas mixture: Ar-CO2-CF4

(30%/50%/20%)

Space resolution = 50 µµµµm (center of gravity of the induced charge on the strips)High rate capability

Page 17: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200117

ATLASUniversity of Roma

“Tor Vergata” Trigger chambersTrigger chambers

Technologies:

•Resistive Plate Chambers(RPC) (|ηηηη| < 1.05)

•Thin Gap Chambers (TGC) (1.05 < |ηηηη| < 2.4)

Technologies:

•Resistive Plate Chambers(RPC) (|ηηηη| < 1.05)

•Thin Gap Chambers (TGC) (1.05 < |ηηηη| < 2.4)

Page 18: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200118

ATLASUniversity of Roma

“Tor Vergata”

Barrel : RPC1 & RPC2 →→→→ low pt > 6 GeV ->Beauty physics low pt & RPC3 →→→→ high pt > 20 GeV ->Higgs search

End-cap : TGC2 & TGC3 →→→→ low ptlow pt & TGC1 →→→→ high pt

Barrel : RPC1 & RPC2 →→→→ low pt > 6 GeV ->Beauty physics low pt & RPC3 →→→→ high pt > 20 GeV ->Higgs search

End-cap : TGC2 & TGC3 →→→→ low ptlow pt & TGC1 →→→→ high pt

ATLAS trigger schemeBunch-crossing rate (40 MHz)Interation rate ~ 1GHz at L= 1034 cm-2s-1

• Level-1 trigger (<100kHz)• Level-2 trigger (~1kHz)

• Event filter (~100Hz)

ATLAS trigger schemeBunch-crossing rate (40 MHz)Interation rate ~ 1GHz at L= 1034 cm-2s-1

• Level-1 trigger (<100kHz)• Level-2 trigger (~1kHz)

• Event filter (~100Hz)

LVL1 muon trigger LVL1 muon trigger

Page 19: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200119

ATLASUniversity of Roma

“Tor Vergata”

Support panel

Support panel

Gas volumesStrips panels

Separating panelStrip panels

RPC detectorRPC detector

RPC unit:2 independent detector layers (2 or 4 gas volumes)A gas volume is read on each side by a x and y strip plane Strip pitches: 2.4 ~ 3.8 cm

RPC unit:2 independent detector layers (2 or 4 gas volumes)A gas volume is read on each side by a x and y strip plane Strip pitches: 2.4 ~ 3.8 cm

RPC:Gas gap: 2 mmBakelite plates: 2 mm, ρρρρ =~2x1010 ΩΩΩΩ x cm Gas working mode: avalancheGas mixture: C2H2F4+isoC4H10+SF6

Time resolution = 1.5ns

RPC:Gas gap: 2 mmBakelite plates: 2 mm, ρρρρ =~2x1010 ΩΩΩΩ x cm Gas working mode: avalancheGas mixture: C2H2F4+isoC4H10+SF6

Time resolution = 1.5ns

Page 20: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200120

ATLASUniversity of Roma

“Tor Vergata”

Gas volumesGas volumes

Cu readout electrode panelsCu readout electrode panels

Al lateral profilesAl lateral profiles

RPC elementsRPC elements

Paper honeycomb and Alsupport panels (Faraday cage)Paper honeycomb and Alsupport panels (Faraday cage)

Page 21: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200121

ATLASUniversity of Roma

“Tor Vergata” Front-end electronicsFront-end electronics

Back-End boards:• terminating resistors • test pulse distribution

Back-End boards:• terminating resistors • test pulse distribution

Front-End boards :• 8 channels GaAs/die • 3 stage amplifier and discriminator• 385.184 readout channels

Front-End boards :• 8 channels GaAs/die • 3 stage amplifier and discriminator• 385.184 readout channels

The Front-end electronics is inside the detector

Page 22: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200122

ATLASUniversity of Roma

“Tor Vergata” RPC quality control(1)RPC quality control(1)

! Bakelite : Resistivity test 1- 6 x 1010 Ω Ω Ω Ω x cm !Gas volume: Spacers thickness 2.0 ±±±± 0.015 mm

!Strip panels : Check strip continuity and isolation

!GaAs chip : DC test on the wafer

!Front-end circuit:

$ DC test

$ AC test

!Assembled unit:

•Performance test with comics ray

(Lecce , Napoli, Protvino, Roma2)

Page 23: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200123

ATLASUniversity of Roma

“Tor Vergata” Front-end electronics test Front-end electronics test Test station in Roma2

Power consumption/ ch. 22 ±2mW

Power consumption/ ch. 22 ±2mW

Minimum threshold/ch. 0.20 ±0.07mV

Minimum threshold/ch. 0.20 ±0.07mV

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A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200124

ATLASUniversity of Roma

“Tor Vergata”

Three comic ray test stations are operational!Tracking is done with RPCs or Drift Chambers! Each station can simultaneously test 8 Units

Three comic ray test stations are operational!Tracking is done with RPCs or Drift Chambers! Each station can simultaneously test 8 Units

Lecce Naples

Roma2

RPC test sitesRPC test sites

Page 25: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200125

ATLASUniversity of Roma

“Tor Vergata” Cosmic ray testsCosmic ray tests

Efficiency vs high voltage

Counting rate vs HV

Cluster size @10.4KV

Nstrip=1.6

BOS unit : dimension 1.1 x3.9 m2

• 4 gas volumes: 8 read-out strip panelsBOS unit : dimension 1.1 x3.9 m2

• 4 gas volumes: 8 read-out strip panels

Page 26: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200126

ATLASUniversity of Roma

“Tor Vergata”

A 15 months ageing test performed on module-0 at the GIF – X5 CERN irradiation facility.

A 15 months ageing test performed on module-0 at the GIF – X5 CERN irradiation facility.

! Average expected counting rate in the ATLAS barrel ~100 Hz/cm2

( including a safety factor ~ 10)! Total counts expected in 10 ATLAS years: 1010/cm2

! Total delivered charge: 0.3 C/cm2

RPC Ageing Studies

GIF-X5:Uniform irradiation with low energy gamma

Source: 740 GBq 137Cs Ε γΕ γΕ γΕ γ = 0.662 MeV

RPC module-0

Page 27: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200127

ATLASUniversity of Roma

“Tor Vergata”

00.10.20.30.40.50.60.70.80.9

1

8000 9000 10000 11000 12000 13000 14000Applied voltage (V)

Eff

icie

ncy

Source=0 rate = 1 Hz/cm^2Source=20 rate= 80 Hz/cm^2Source=10 rate=160 Hz/cm^2Source=5 rate =300 Hz/cm^2

! The RPC module-0 after ageing shows a rate capability of ~ 200-300Hz/ cm2

!The ageing effect can be described in term of an increase of the operating voltage, due to an increase of the electrode total resistence

! The RPC module-0 after ageing shows a rate capability of ~ 200-300Hz/ cm2

!The ageing effect can be described in term of an increase of the operating voltage, due to an increase of the electrode total resistence

RPC Module-0 Ageing

Efficiency vs HV after Q = 0.35 C/cm2

(12 ATLAS years )

Time resolution

σσσσ =1.3ns

Page 28: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200128

ATLASUniversity of Roma

“Tor Vergata”

2000 3 modules-0! Preproduction:

2001 May – July 24 units ! Production:

2001 October- December 24% 2002 40% 2003 33%

! Special chambers production (3% of the total area) 2003

RPC mass production plan RPC mass production plan

Page 29: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200129

ATLASUniversity of Roma

“Tor Vergata”

Gas mixture : CO2 / n-C5H12 (55%/45%)

TGC detectorTGC detector

Read-out :

• wires (read out in group of 4 - 20)

• strips (pitch : 15mm- 49mm)

Gas gap : 2.8 mmAnode wire pitch : 1.8 mmHV: 3.0 KVGas gain:106

Doublet Doublet TripletTriplet

Efficiency : > 99 % for 25 ns gate

Page 30: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200130

ATLASUniversity of Roma

“Tor Vergata”

@ 2.9 kV

0

5

10

15

20

25

30

35

40

0 60 120 180 240 300

leak current (nA)

!Carbon resistivity measurement :1.0 ±±±± 0.5 M ΩΩΩΩ!Chamber flatness : ~ 0.1 mm!HV test (before chamber closing, unit gluing) :

#gas :CO2 or CO2+n-pentane#check the leak current and stability

!Pulse test : readout line check!Performace test with cosmics ray

CO2 HV test

TGC Quality Control(1)TGC Quality Control(1)

Test sites:$Technion Inst. (already operational).

$ Tel-Aviv Univ. (ready soon)

$ Kobe Univ. (ready soon)

Test sites:$Technion Inst. (already operational).

$ Tel-Aviv Univ. (ready soon)

$ Kobe Univ. (ready soon)

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A. Di Ciaccio – 7th International Conference on Advanced Technology and Particle Physics – Como 18 October 200131

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“Tor Vergata”

TGC

Precision chambers (x-y strips, 3.6 mm pitch)

Technion Inst. Comic ray test

TGC Quality Control (2)TGC Quality Control (2)

Tested already 82 units

Efficiency of a TGC wire plane

Page 32: The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometervillaolmo.mib.infn.it/talks/A_Diciaccio.pdf · The ATLAS Muon SpectrometerThe ATLAS Muon Spectrometer Anna Di Ciaccio University

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ATLASUniversity of Roma

“Tor Vergata” TGC mass production plan TGC mass production plan

384

1056

2160

Total chambers

01925ShandogUniversity(03.2002)

1639638410KEKLaboratory(01.2001)

67233657610WeizmannInstitute(06.1999)

Chambers (built up to 1.10.2001)

TripletsDoubletsProd. rate(chambers/week)

Production sites(start of prod)

835 Chambers produced ( 23% of ATLAS total)

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“Tor Vergata” ConclusionsConclusions

% All module-0 muon chambers have shown the expected performance

% The ATLAS Muon spectrometer is in full mass production until the year 2004.

% Waiting for the year 2006 tostart exciting physics!!!

After one year with LHC running at L=1034cm-2 s-1

After one year with LHC running at L=1034cm-2 s-1