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HK: Fachverband Physik der Hadronen und Kerne

HK 44: Instrumentation IX

HK 44.7: Vortrag

Donnerstag, 30. März 2017, 15:45–16:00, F 102

Simulation results for the upgraded RICH detector in the HADES experiment.† — •Semen Lebedev^1,3, Jürgen Friese², Claudia Höhne¹, and Tobias Kunz² for the HADES collaboration — ¹Justus Liebig Universität Giessen, II. Physikalisches Institut — ²Technische Universität München, Physik Department E62 — ³LIT JINR, Dubna, Russia

A Ring Imaging Cherenkov (RICH) detector is used to identify electron-positron pairs in the HADES experiment. In cooperation with the CBM-RICH collaboration the existing gaseous photon detector based on a MWPC with CsI cathode will be replaced by multianode photomultipliers (MAPMT). The detector geometry of the upgraded RICH has been implemented in the HADES analysis package HYDRA. The upgraded detector simulation includes the versatile and optimized ring reconstruction algorithm developed for the CBM RICH and realistic photo tube readout response. Simulations show that the detection efficiency for electron-positron pairs increases significantly, in particular for pairs with very small opening angles.

We will present the expected detector performance and compare it to results obtained in a previous HADES experiment for the system p+Nb at E_kin=3.5 GeV.

†   Supported by BMBF (05P15RGFCA, 05P12WOGHH) and the Excellence Cluster Universe