Speaker
Michele Cascella
(Università del Salento e INFN di Lecce)
Description
First attempts to use electromagnetic calorimeter prototypes made of Mo-doped PbWO4 crystals or by BGO crystals, in view of the possible application of such a detector in dual-readout hybrid calorimetry will be presented. We have tested matrices of these crystals as electromagnetic calorimeters and studied the properties of the Cerenkov and scintillation components of the signals generated by high-energy electrons showering in these detectors.
Dual-Readout calorimetry (DREAM) was proposed as a technique that would make it possible to eliminate the factors that traditionally limit and spoil the performance of the large hadron calorimeters operating in modern particle physics experiments at the energy frontier. By comparing the signals generated in the form of Cerenkov and scintillation light, it is possible to determine the electromagnetic shower fraction for individual events, and its fluctuations, which are the dominant contribution to the hadronic energy resolution, can be eliminated.
In recent years, the RD52 collaboration have developed four different methods to split crystal signals into their scintillation and Cerenkov components. These methods exploit differences in the angular distribution of the light, in the spectral characteristics, in the time structure of the signals, and the fact that Cerenkov light is polarized.
In this poster we investigate to what extent the promise of improved calorimeter performance can be realized with such crystals.
for the collaboration
on behalf of the RD52 (DREAM) collaboration
