Performance of the PrimEx Electromagnetic Calorimeter
- 1 January 2006
- proceedings article
- Published by AIP Publishing in AIP Conference Proceedings
- Vol. 867 (1) , 51-58
- https://doi.org/10.1063/1.2396938
Abstract
We report the design and performance of the hybrid electromagnetic calorimeter consisting of 1152 PbWO 4 crystals and 576 lead glass blocks for the PrimEx experiment at the Jefferson Laboratory. The detector was built for high precision measurement of the neutral pion lifetime via the Primakoff effect. Calorimeter installation and commissioning was completed with the first physics run in fall of 2004. We present the energy and position resolution of the calorimeter. Obtained π0 mass resolution of 1.3MeV/c2 and its production angle resolution of 0.34mrad demonstrate the ability of the experiment to extract the π0 lifetime on one percent level.Keywords
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