Title :
Performance of PWO-II Prototype Arrays for the EMC of PANDA
Author :
Novotny, Rainer Willi ; Doring, Werner ; Dormenev, Valera ; Drexler, Peter ; Erni, Werner ; Rost, Matthias ; Steinacher, Michael ; Thiel, Michaela ; Thomas, Andreas
Author_Institution :
Phys. Inst., Univ. Giessen, Giessen
fDate :
6/1/2008 12:00:00 AM
Abstract :
The response function of a 3 times 3 matrix of 200-mm-long PWO-II crystals has been measured with energy-marked photons up to 675 MeV energy. For the first time the crystals were readout individually with one large area avalanche photo diode of the second generation operating at a temperature of 0degC. The reconstructed electromagnetic shower distributions show excellent energy resolutions down to 40 MeV. Reducing the temperature and increasing the light collection by an additional large-area avalanche photo diode can achieve further improvement.
Keywords :
avalanche photodiodes; lead compounds; particle calorimetry; solid scintillation detectors; EMC; PANDA detector; PWO-II prototype arrays; PbWO4; avalanche photodiode; electromagnetic calorimeter; electromagnetic shower distributions; electron volt energy 675 MeV; temperature 0 C; Detectors; Diodes; Electromagnetic compatibility; Electromagnetic measurements; Energy measurement; Energy resolution; Photonic crystals; Prototypes; Spectroscopy; Temperature; Calorimetry; detectors; radiation detectors; scintillation detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2008.922807
