Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Instrumentation 9
HK 23.4: Talk
Tuesday, March 24, 2015, 15:30–15:45, M/HS4
Prototype tests with the 3D Barrel DIRC of PANDA — Roman Dzhygadlo1, Andreas Gerhardt1, Grzegorz Kalicy1,2,3, Marvin Krebs1,2, Harphool Kumawat1,4, Dorothe Lehmann1, Maria Patsyuk1, Klaus Peters1,2, Georg Schepers1, •Carsten Schwarz1, Jochen Schwiening1, and Marko Zühlsdorf1,2 for the PANDA Cherenkov Group of the PANDA collaboration — 1GSI, Darmstadt, Germany — 2Goethe University, Frankfurt, Germany — 3Jefferson Lab, Newport News, Virginia, USA — 4Bhabha Atomic Research Centre, Mumbai, India
The prototype tests of the Barrel DIRC counter, under development for the future PANDA experiment at FAIR, aim at the improvement of the original design, applied successfully by BABAR. Subjects of the R&D for this 3D Cherenkov counter include the focusing system and fast photon timing as well as the width of the radiators and the shape of the expansion volume.
A modular prototype was built which allows an easy exchange of all key components under investigation. Prototype radiators from several optical companies, were tested in hadronic particle beams at CERN and at GSI. Data were recorded with narrow bars as well as with wide plates, coupled via an optional focusing lens system to a large solid fused silica prism, used as expansion volume.
We present a study of the performance of the prototype in several configurations with a focus on the single photon Cherenkov angle resolution and photon yield. Work supported by BMBF 05E12CD2, EU FP7 227431, HGS-HIRe.