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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.6: Poster

Dienstag, 28. März 2017, 16:45–18:45, F Foyer

Development of a graphical user interface for the energy calibration of the Crystal Barrel calorimeter — •Ben Salisbury for the CBELSA/TAPS collaboration — Helmholtz-Institut für Strahlen- und Kernphysik, Nussallee 14-16, 53115 Bonn

Essential to understand the baryon spectrum is a precise knowledge of the excited states and their decays. Partial wave analysis needs to be performed to extract the contributing resonances from experimental data. In order to find an unambiguous solution, the measurement of polarization observables is necessary. To determine these observables a precise reconstruction of the reactions is indispensable.

With an angular coverage of almost 4π, a high photon detection efficiency and a good energy resolution, the Crystal Barrel/TAPS experiment is very well suited to measure the decay of neutral mesons into photons. To reconstruct the final state particles of a reaction it is necessary to correctly determine the energy deposited by the photons in the detector. Hence each crystal needs to be calibrated, including the gain factor of the electronics chain to retrieve and digitalize the deposited energy. This is done iteratively using the decay π⁰ → γ γ together with the known π⁰-mass. A graphical user interface was implemented to reduce the effort involved with the energy calibration of the Crystal Barrel calorimeter.

A short overview over the energy calibration and the most important features of the graphical user interface for the energy calibration will be given.

Supported by the DFG (SFB/TR16).