Frankfurt 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 46: Poster
HK 46.68: Poster
Thursday, March 20, 2014, 16:00–18:00, HZ Poster
Study of the PANDA Barrel DIRC prototype timing resolution — •Marvin Krebs1,2, Klaus Peters1,2, Carsten Schwarz1, and Jochen Schwiening1 — 1GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt — 2Goethe-Universität Frankfurt am Main
The PANDA experiment at the new Facility for Antiproton and Ion Research in Europe (FAIR) at GSI, Darmstadt, will study fundamental questions of hadron physics and QCD. A DIRC (Detection of Internally Reflected Cherenkov light) counter will provide hadronic particle identification (PID) in the barrel region of the PANDA detector. In order to meet the PID requirements the DIRC has to provide precise measurements of the Cherenkov angle and the propagation time of single photons. A barrel DIRC prototype was successfully tested with particle beams at CERN in 2012. A detailed study was performed after the beam time to understand the observed timing resolution and the contributions from the photon detectors, trigger system, and electronics. The prototype readout system, including the TRBs and the current generation of MCP-PMTs was studied using electronic pulsers and picosecond laser pulsers. We present measurements of the single photon timing resolution as a function of critical parameters like signal amplitudes, signal slopes and sensor occupancy. Work supported by EU FP7 grant, contract number 227431, HadronPhysics2, and the Helmholtz Graduate School for Hadron and Ion research HGS-HIRe