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Pad plane production for the ALICE-TRD readout chambers

By W. Sommer, C. Adler, W. Amend, C. Blume, D. Emschermann, S. Freuen and H. Hinke


The ALICE detector is a dedicated heavy-ion experiment at the new Large-Hadron-Collider (LHC) at CERN. One of its major components is the Transition Radiation Detector (TRD). It consists of 540 readout chambers. Each chamber has a 5 cm thick radiator where the transition radiation is produced. Attached to the radiator is a gas chamber to detect the transition radiation and measure the ionisation produced by the traversing particle. The gas chamber has a 3 cm long drift region and a 0.7 cm amplification gap. The induced charge is collected at the back panel of the chamber which is covered by copper pads of size 1.2 × 9 cm 2. The copper pads are connected to the readout electronics via flat ribbon cables. Each cable connects 18 pads. 48 cables are soldered to the backside of each pad panel. All in all 1540 pad planes will be produced

Year: 2010
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