Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Instrumentation 11

HK 31.4: Vortrag

Dienstag, 24. März 2015, 17:45–18:00, M/HS2

Simulation Studies for the PANDA Endcap Disc DIRC — •Mustafa Schmidt¹, Klim Biguenko¹, Michael Düren¹, Klaus Föhl², Avetik Hayrapetyan¹, Benno Kröck¹, Oliver Merle¹, and Julian Rieke¹ for the PANDA collaboration — ¹II. Physikalisches Institut, Justus-Liebig-Universität, Gießen, Deutschland — ²CERN, Genf, Schweiz

The physics program of the PANDA detector at the future FAIR facility at GSI requires excellent particle identification. For the Panda forward endcap region a novel detector type called "Disc DIRC" has been designed. It covers the angular range between 5 and 22 degrees and uses internally reflected Cherenkov light in order to separate pions, kaons and protons up to a momentum of 4 GeV/c.

During the design phase, extensive detector simulations have been performed to optimize and evaluate the design. The simulations were done using Geant4 and the PandaRoot framework in addition with a dedicated reconstruction software. An important aspect was the optimization of the imaging while taking the geometrical tolerances of the manufacturing process of the final detector into account. The main focus lies on the optimization process of the cylindrical and polynomial focussing optics at the edges of the detector plate, which has been performed with the merit function of a raytracer called PyOptics, written by one of the group members.