Mainz 2004 – scientific programme

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T: Teilchenphysik

T 306: Trigger und DAQ III

T 306.5: Talk

Tuesday, March 30, 2004, 17:00–17:15, HS VII

Data Quality Check for the Muon Detector of the HERA-B 2002/2003 Run — •V. Sipica, M. Böcker, P. Buchholz, and U. Husemann — Fachbereich Physik, Universität Siegen, 57068 Siegen

HERA-B is a fixed target experiment designed to study the production of heavy quarks. The HERA-B Muon Detector consists of 4 super-layers composed of wire chambers with anode wire readout or with both wire and cathode pad readout.
A data quality check of all runs containing muon data has been performed, studying the amount of bad readout channels and their influence on the data analysis. The runs were selected from the run-list corresponding to the 2002/2003 data taking period, in total 294. The muon hit distributions in all layers, as well as the pretrigger coincidence rate distribution were studied, and the number of “hot” channels was counted. In order to obtain a measure for the influence of bad channels on the analysis, a MC simulation was used and artificial “hot” channels were added. Then the data was passed through the track reconstruction chain, and the variation of the number of reconstructed muon tracks was studied, resulting in minor effects. Regarding the pretrigger efficiency, there are other effects to be considered, which will be studied in an independent pretrigger efficiency analysis.