Performance of PWO-II Prototype Arrays for the EMC of PANDA.
- Resource Type
- Article
- Authors
- Novotny, Rainer Willi; Doring, Werner; Dormenev, Valera; Drexler, Peter; Erni, Werner; Rost, Matthias; Steinacher, Michael; Thiel, Michaela; Thomas, Andreas
- Source
- IEEE Transactions on Nuclear Science. Jun2008 Part 2, Vol. 55 Issue 3, p1295-1298. 4p. 8 Graphs.
- Subject
- *CRYSTALS
*PHOTONS
*ENERGY transfer
*PHOTODIODES
*ELECTROMAGNETIC fields
*TEMPERATURE
- Language
- ISSN
- 0018-9499
The response function of a 3 × 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 0 ° C. 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. [ABSTRACT FROM AUTHOR]