Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 19: Instrumentation
HK 19.4: Vortrag
Dienstag, 20. März 2012, 17:30–17:45, P 3
Prototype for the PANDA Barrel DIRC — Andreas Gerhardt1, Roland Hohler1,2, •Grzegorz Kalicy1,2, Dorothee Lehmann1, Klaus Peters1,2, Georg Schepers1, and Carsten Schwarz1 — 1GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 2Goethe-Universität, Frankfurt
The design of the Barrel DIRC (Detector of Internally Reflected Cherenkov light) detector for the future PANDA experiment at GSI contains several important improvements compared to the successful BABAR DIRC, such as focusing and fast timing. To test those improvements as well as other design options a prototype was build and successfully tested in 2011 during test beam times at GSI and CERN.
The prototype comprises a radiator bar, focusing lens, mirror, and oil-filled expansion volume. An array of micro-channel plate photomultiplier tubes measures the location and arrival time of the Cherenkov photons with a resolution of 100–200ps. During the beam tests the angle between bar and particle direction was varied. Different focusing optics and radiator bars were tested.
The performance of the prototype during the beam tests will be presented including results of the measurement of the Cherenkov angle resolution.
Work supported by EU6 grant, contract number 515873, DIRACsecondary-Beams, EU FP7 grant, contract number 227431, HadronPhysics2, and the Helmholtz Graduate School for Hadron and Ion Research HGS-HIRe.