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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Instrumentierung

HK 57.1: Gruppenbericht

Freitag, 21. März 2014, 11:00–11:30, HZ 9

PANDA Luminosity Detector software: preparation for expected challenges — •A. Karavdina¹, A. Denig^{1, 2}, P. Jasinski^{1, 2}, M. Michel^{1, 2}, S. Pflüger^{1, 2}, and M. Fritsch^{1, 2} for the PANDA collaboration — ¹Johannes Gutenberg-Universität Mainz — ²Helmholtz-Institut Mainz

Precise determination of the luminosity is crucial for planned PANDA experiment (FAIR, Germany). For the luminosity measurement we will exploit the differential cross section of the elastic pp scattering in dependence of the scattering angle. The Luminosity Detector (LMD) should have full azimuthal angle acceptance and good spatial resolution to achieve the needed precision for the measurement. These requirement can be succeeded by four planes of thin silicon pixel sensors. In parallel to the prototype construction, the reconstruction software is under development. Monte Carlo based simulation is used to proof the design concept, test the reconstruction under different conditions and study expected distortions of the simulated ideal world by real life effects. Those effects include possible technical problems (e.g. sensor misalignment or broken sensors) as well as challenges not related directly to the LMD set-up (e.g. physical background or radiation damage). Moreover the extraction of the luminosity relies on a sophisticated fit to the data with a combination of the theory model, non-uniform detector resolution and reconstruction efficiency. A special framework was developed to simplify fitting procedure.

In this talk an overview of the reconstruction software concept and studies related to the effects discussed above will be presented.