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D. Froidevaux
Table 16.10 Main parameters of the ATLAS calorimeter system
Barrel
End-cap
EM calorimeter
Number of layers and |η| coverage
Presampler 1
|η| < 1.52
1
1.5 < |η| < 1.8
Calorimeter 3
|η| < 1.35
2
1.375 < |η| < 1.5
2
1.35 < |η| < 1.475 3
1.5 < |η| < 2.5
2
2.5 < |η| < 3.2
Granularity × φ versus |η|
Presampler 0.025 × 0.1
|η| < 1.52
0.025 × 0.1
1.5 < |η| < 1.8
Calorimeter
(strip layer)
0.025/8 × 0.1 |η| < 1.40
0.050 × 0.1
1.375 < |η| <
1.425
0.025 × 0.025 1.40 < |η| < 1.475 0.025 × 0.1
1.425 < |η| < 1.5
0.025/8 × 0.1
1.5 < |η| < 1.8
0.025/6 × 0.1
1.8 < |η| < 2.0
0.025/4 × 0.1
2.0 < |η| < 2.4
0.025 × 0.1
2.4 < |η| < 2.5
0.1 × 0.1
2.5 < |η| < 3.2
Calorimeter
(middle layer)
0.025 × 0.025 |η| < 1.40
0.050 × 0.025
1.375 < |η| <
1.425
0.075 × 0.025 1.40 < |η| < 1.475 0.025 × 0.025
1.425 < |η| < 2.5
0.1 × 0.1
2.5 < |η| < 3.2
Calorimeter
(back layer)
0.050 × 0.025 |η| < 1.35
0.050 × 0.025
1.5 < |η| < 2.5
Number of readout channels
Presampler 7808
1536 (both sides)
Calorimeter 101,760
62,208 (both
sides)
LAr hadronic end-cap
|η| coverage
1.5 < |η| < 3.2
Number of
layers
4
Granularity
× φ
0.1 × 0.1
1.5 < |η| < 2.5
0.2 × 0.2
2.5 < |η| < 3.2
Readout
channels
5632 (both sides)
LAr forward calorimeter
|η| coverage
3.1 < |η| < 4.9
Number of
layers
3
(continued)