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HK: Fachverband Physik der Hadronen und Kerne

HK 52: HK+T Joint Session VII: Gas Detectors/GEM

HK 52.3: Vortrag

Donnerstag, 30. März 2017, 17:30–17:45, F 102

Prototype of GEM based readout chamber for the upgrade of the Time Projection Chamber of ALICE — •Thomas Theodor Rudzki for the ALICE collaboration — Research Division and ExtreMe Matter Institute, GSI Helmholtzzentrum für Schwe- rionenforschung, Planckstr. 1, 64291 Darmstadt — Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg

The Time Projection Chamber (TPC) of ALICE is its most important tracking detector. In its present implementation, it can handle a trigger rate up to 3 kHz. Starting from 2021, the ALICE experiment will record Pb-Pb collisions at 50 kHz making an upgrade of the TPC indispensable. For this purpose, the current multi-wire proportional chambers will be replaced by new ones equipped with GEM foils.

Recently, the first two Outer ReadOut Chambers (OROC) were assembled in Bucharest and at GSI, Darmstadt. Both OROCs were subject to extensive tests.

The talk will give an introduction to the new design of the OROC and its components and present results of perfomance tests. The focus lies on the results of the validation tests carried out with the first OROC assembled at GSI, in particular the gas tightness and the performance of the chamber under ionising radiation in terms of gain uniformity and stability.

In the end, a brief outlook of upcoming tests like a testbeam and the regular production of OROCs will be given.