1 chep 2000, 10.02.2000roberto barbera the alice inner tracking system off-line software chep 2000,...

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CHEP 2000, 10.02.2000 Roberto Barbera

Roberto Barbera

The ALICE Inner Tracking System Off-line Software

CHEP 2000, 10.02.2000 (http://www.physics.ohio-state.edu/˜nilsen/ALICE-ITS/ITSofflineWebPage.html)

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CHEP 2000, 10.02.2000

ITS

http://www.cern.ch/ALICE

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Dipartimento di Fisica dell’Università di Catania and INFN Catania - Italy

ALICE Collaboration

Layer Type R(cm)

Z (cm) Area Ladders Ladders/stave

Detect/ladder

Channels

1 Pixel 4 16.5 0.09 80 4 1 52428802 Pixel 7 16.5 0.18 160 4 1 104857603 Drift 14.9 22.2 0.42 14 --- 6 430084 Drift 23.8 29.7 0.89 22 --- 8 901125 Strip 39.1 45.1 2.28 34 --- 23 12011526 Strip 43.6 50.8 2.88 38 --- 26 1517568

ALICE Inner Tracking System (ITS)

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ALICE Collaboration

Parameter SPD’s SDD’s SSD’s

Spatial precision r (m) 12 38 20Spatial precision z (m) 70 28 830Two track resolution r (m) 100 200 300Two track resolution z (m) 600 600 2400Cell size (m x m) 50 x 300 150 x 300 95 x 40000Module active area (mm x mm) 13.8 x 82 72.5 x 75.3 73 x 40Readout channel per module 65536 2 x 256 2 x 768Total number of modules 240 260 1770Total number of readout channels (k) 15729 133 2719Total number of cells (M) 15.7 34 2.7Average occupancy (inner layer) (%) 1.5 2.5 4Average occupancy (outer layer) (%) 0.4 1.0 3.3Power dissipation in barrel (W) 1500-2000 510 1100Power dissipation in end-caps (W) --- 410 1500

(dn/dy)y=0 8000 charged particles

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

Radiaton length vs. pseudorapidity

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

Zlocal (cm)

Xlocal (cm)

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

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ALICE Collaboration

Particle identification

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ALICE Collaboration

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ALICE Collaboration

Conclusions

• ALICE is being designed the leading edge of the technology both for the actual realization and simulation point of view

• Along this line, the ITS Off-line Sotware has been conceived and realized following the criteria of the OO software engineering

• Preliminary results obtained with this code are greatly satisfying, confirming the capabilities foreseen for this detector which is crucial for the physics to be done with ALICE

1 chep 2000, 10.02.2000roberto barbera the alice inner tracking system off-line software chep 2000,...

Documents

fisica delluniversit

roberto barbera dipartimento

pseudorapidity slide

charged particles