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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Poster

HK 46.76: Poster

Donnerstag, 20. März 2014, 16:00–18:00, HZ Poster

Data quality assessment for the ALICE Photon Spectrometer PHOS — •Dominik Herzig for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

The ALICE experiment is designed to study the properties of strongly interacting matter at high energy densities with high precision.
The ALICE PHOS detector is a high resolution electromagnetic calorimeter to measure the position and energy of photons produced in heavy ion collisions. The PHOS consists of 17920 lead-tungstate crystal towers organized in 5 modules.
A vital part of the analysis of the PHOS data is the evaluation of bad towers. Miscalibrated or malfunctioning towers need to be excluded before further data analysis can start.
We present a data driven approach to bad tower identification. Observables such as the average hit energy or the average hit number per cell are used in this approach. The results are compared to alternative methods of bad channel QA already used for the PHOS analysis.
Supported by BMBF and the Helmholtz Association.