Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Poster

HK 48.64: Poster

Wednesday, March 25, 2015, 17:00–19:00, C/Foyer

^83mKr for Calibration and Energy Resolution Studies of GEM-TPCs — •Roman Schmitz for the GEM-TPC collaboration — Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn

Time Projection Chambers are excellent detectors for full three-dimensional tracking of particles. The number of readout channels is usually of the order O(10³−10⁵) and therefore a precise calibration is necessary to achieve optimal energy resolution and particle identification performance. Radioactive ^83mKr is a perfectly suited source for calibration of such a detector. It delivers an energy spectrum matching the typical energy loss of different particle types inside the detector and has a sufficiently short half-life to perform normal operation after a few hours.
Results on absolute and relative calibration of two GEM-TPCs with ^83mKr are shown as well as the impact on specific energy loss performance. Resolution studies have been performed taking into account theoretically possible performance and noise contributions.
This work is supported by DFG SFB/TR 16.