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T: Fachverband Teilchenphysik

T 87: Gaseous detectors II

T 87.1: Vortrag

Donnerstag, 2. April 2020, 16:30–16:45, L-3.016

Belle 2 Central Drift Chamber Wire Monitoring Software Developments — •Henrikas Svidras, Alexander Glazov, and Kerstin Tackmann for the Belle II collaboration — Deutsches Elektronen Synchrotron, 22607 Hamburg, Germany

Belle 2 is an experiment at the next-generation B factory SuperKEKB located at KEK in Tsukuba, Japan. It aims to probe heavy flavour physics at a higher precision than its predecessors, namely BaBar and Belle. The goal is to collect 50 ab⁻¹ of data during its run: more than 50 times that of Belle. One of the main components used in triggering, tracking and charged particle identification is the Central Drift Chamber (CDC). Thorough understanding and monitoring of the conditions of this subdetector are crucial, as it is a key element in the whole detector performance. In this talk, a newly-developed CDC wire monitoring software tool will be presented. It is used to identify faulty wires and wire groups within the CDC for a given period of data takes. The information from reconstructed tracks is used to look for the closest wires that particles passed but had no hits recorded. Therefore, the wire monitoring tool is able to select the wires and wire sectors that continuously fail to produce hits that contribute to track reconstruction. This has been used to mark and monitor these wires for most recent data takes, with this information now available for tracking and to simulate the detector conditions.