Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Instrumentation XI

HK 35.1: Talk

Wednesday, February 28, 2018, 14:00–14:15, Audimax H1

Track Reconstruction for the CBELSA/TAPS TPC — •Philipp Bielefeldt, Markus Ball, Jonathan Ottnad, and Bernhard Ketzer for the CBELSA/TAPS collaboration — Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Germany

The current set-up of the CBELSA/TAPS experiment at the ELSA electron accelerator facility in Bonn is well-suited for the detection of neutral particles. It conducts measurements on the entire excitation spectrum of nucleons using a polarised photon beam on a polarised target. For a future upgrade, a gas-filled Time Projection Chamber with Gas Electron Multiplier read-out (GEM-TPC) is being developed. It will allow studies of charged particles in the final state and will improve particle identification and background suppression capabilities.

Track reconstruction within the GEM-TPC is developed based on GENFIT II, a sophisticated, experiment-independent tracking and reconstruction framework. GENFIT II will be used as a plug-in for ExPlORA, an analysis software developed for CBELSA. This framework, based on ROOT, allows the user to easily apply analysis and visualisation techniques, facilitating analyses through an XML front-end.

In this talk, the implementation of the GENFIT II framework for the GEM-TPC at CBELSA/TAPS will be explained. An overview of ExPlORA and the plug-ins used will be given. The pattern recognition and fitting performance of GENFIT II within the framework will be presented.