Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Instrumentation 8

HK 22.5: Talk

Tuesday, March 24, 2015, 15:30–15:45, M/HS2

Optimization of Local On-line Tracking in the ALICE TRD — •Hannah Klingenmeyer for the ALICE collaboration — Physikalisches Institut, University of Heidelberg

The Transition Radiation Detector (TRD) at the LHC (CERN) provides electron identification in the central barrel of ALICE as well as trigger contributions for electrons and jets. More than 65,000 multi-chip modules allow a fast on-detector reconstruction of chamber-wise track segments, which include position, angle and PID information. These track segments are then merged into tracks which provide information on transverse momenta and electron identification.

This talk will focus on the optimization of the reconstruction of the track segments to improve the PID and trigger performance. The settings in the multi-chip modules are varied to study their impact on the performance. In particular, the parameters for cluster finding and fitting will be discussed, as these determine the efficiency and resolutions of the local on-line tracking, which in turn strongly influence the trigger performance. The optimization of the performance for the triggers is foreseen for LHC Run 2.