Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 75: Accelerators and Instrumentation I
HK 75.6: Vortrag
Donnerstag, 19. März 2009, 18:00–18:15, H-ZO 80
Large volume PWO crystals in PANDA geometry provided by SICCAS — •Markus Moritz, Tobias Eissner, Werner Döring, and Rainer Novotny — 2nd Physics Institute, University Giessen
For the first time, full size tapered PbWO4 crystals in PANDA-geometry have been produced by SICCAS at Shanghai (China) and compared to the PWO-II quality as required for the electromagnetic target calorimeter of the PANDA detector. The report describes in detail the different test procedures on optical transparency, scintillation yield, homogeneity and kinetics of the scintillation processes at different temperatures. The investigations focus in particular on the radiation hardness at the operating temperature of T=-25∘C. These measurements are performed at the 60Co irradiation facility at Giessen. The report compares the achieved quality parameters with the specification limits of the EMC and discusses the results with respect to the growing technology and further improvements.