Bonn 2020 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 30: Instrumentation VI
HK 30.2: Talk
Wednesday, April 1, 2020, 14:30–14:45, J-HS D
The PANDA Disc DIRC Project — •Ilknur Köseoglu1,2, Simon Bodenschatz1, Lisa Brück1, Michael Düren1, Avetik Hayrapetyan1, Jan Hofmann1, Sophie Kegel1, Jhonatan Pereira de Lira1, and Mustafa Schmidt1 for the PANDA collaboration — 1II. Physikalisches Institut, Justus Liebig University of Giessen, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
The fixed target experiment PANDA at the new Facility for Antiproton and Ion Research (FAIR) near Darmstadt/Germany is planned to investigate fundamental questions of hadron physics by using an antiproton beam with a momentum range of 1.5 to 15 GeV/c. In order to achieve an excellent particle identification (PID) for the polar angle range from 5° to 22°, a novel disc shaped Endcap Disc DIRC (EDD) has been developed to perform a π/K separation with at least 3 σ up to 4 GeV/c particle momenta. The Cherenkov radiator of the EDD is a 2 cm thin plate of synthetic fused silica, divided into 4 identical independent quadrants. They will be polished with highest precision in order to conserve the Cherenkov angle during the light propagation to the outer rim. The light guides and light sensors, that are lifetime enhanced Microchannel Plate PMTs (MCP-PMTs), are positioned at the outer rim to detect the signal with an ASIC-based readout system. A full size quadrant was delivered in August 2019, and the precision of the optical system has been investigated using a laser system. After accomplishment of the quality measurements, the Cherenkov radiation will be measured in the Giessen Cosmic Station (GCS).