Title :
Prototype of a DIRC-barrel for the P̄ANDA Experiment
Author :
Hohler, Roland ; Lehmann, Dorothee ; Peters, Klaus ; Schepers, Georg ; Schwarz, Carsten ; Sfienti, Concettina ; König, Wolfgang ; Palka, Marek ; Traxler, Michael
Author_Institution :
GSI Helmholtzzentrum fÿr Schwerionenforschung GmbH, Germany
Abstract :
The P̄ANDA Experiment will be one of the large experiments of the future FAIR facility. The physics program requires a good kaon/pion-separation. To achieve this goal, three Cherenkov detectors are forseen. Around the interaction point a DIRC-barrel is planned with a readout-box inside the magnetic field. A radiator quality test is shown to point out the importance of the knowledge of the radiator surface roughness. The precision of the roughness determination itself is better than 2 Å. Furthermore the first prototype of a DIRC-barrel is presented in detail. The focussing readout is realized by a lens, attached at the end of the radiator. As photon detectors micro-channel plate PMTs are used to fulfill the requirement of an magnetic-insensitive detection. Finally preliminary results of a recent test with 2.3 GeV protons show the successful measurement of Cherenkov ring fragments in the expected region.
Keywords :
Detectors; Lenses; Magnetic fields; Mesons; Physics; Protons; Prototypes; Rough surfaces; Surface roughness; Testing;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2008. NSS '08. IEEE
Conference_Location :
Dresden, Germany
Print_ISBN :
978-1-4244-2714-7
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2008.4774706