Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 35: Instrumentation XI
HK 35.8: Vortrag
Mittwoch, 28. Februar 2018, 15:45–16:00, Audimax H1
dE/dx Resolution Studies of a Pre-Production Read Out Chamber for the ALICE GEM TPC — •Thomas Klemenz for the ALICE collaboration — TU München, Physik Department E62, Excellence Cluster ’Universe’, Garching
The ALICE Collaboration is planning a major upgrade of its central barrel detectors to be able to cope with the increased LHC luminosity beyond 2019. In order to record at an increased interaction rate of up to 50 kHz in Pb–Pb collisions, the TPC will be operated in an ungated mode with continuous readout. This demands for a replacement of the currently employed gated Multi-Wire Proportional Chambers by GEM-based (Gas Electron Multiplier) readout chambers, while retaining the performance in particular in terms of particle identification capabilities via the measurement of the specific energy loss.
The increase in interaction rate and the requirements of a continuous readout demand for significant modifications of the read out chambers, front-end cards and the corresponding software framework. To validate the performance of a newly built 4-GEM Inner Read Out Chamber from the pre-production equipped with the newly developed front end electronics, the dE/dx resolution was evaluated with a beam of electrons and pions at the CERN proton synchrotron. The results are presented together with an overview on the digitization in the new software framework O2, which is validated with the test beam data.
This research was supported by the DFG cluster of excellence ’Origin and Structure of the Universe’, BMBF and HGF.