Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 80: Instrumentation
HK 80.1: Gruppenbericht
Donnerstag, 7. März 2013, 16:45–17:15, HSZ-405
Status and future of the ALICE TPC, a high-resolution detector for the highest particle multiplicities — •Christian Lippmann — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
The Time Projection Chamber (TPC) of the ALICE experiment is a large 3-dimensional tracking and particle identification device for ultra-high multiplicity collision events. It has been operated successfully at the Large Hadron Collider (LHC) at CERN, recording collisions of protons (since November 2009) and lead nuclei (one month each in 2010 and 2011). In the beginning of 2013, just before the first long LHC shutdown (LS1) starts, ALICE will record p-Pb collisions that are expected to occur at interaction rates up to 200 kHz. During LS1 the necessary consolidation and upgrade activities in order to ensure reliable operation at nominal LHC energies (√s = 14 TeV pp and √sNN = 5.5 TeV Pb-Pb collisions) will be carried out.
A new phase of the data taking will finally commence after the second long LHC shutdown (LS2) in 2018, where the ALICE upgrade plans foresee to operate the experiment in Pb-Pb at an interaction rate of 50 kHz. For this purpose, the MWPC-based TPC readout chambers will be replaced by Gas Electron Multipliers (GEMs), allowing a continuous readout of the TPC. These upgrade plans have recently been endorsed by the CERN LHC Committee.
In this presentation the performance and operational experience with the current TPC will be discussed and an overview of the upgrade plans and the ongoing R&D activities will be given.