Speaker
Description
The idea of adding an Electromagnetic CALorimeter to the HADES spectrometer came from an interest in photon measurement and consequentially the detection of neutral mesons and resonances via their decay in photon pairs. Another advantage of having ECAL in the system is a significant improvement of electron-pion separation at high momenta. The detector is based on lead-glass modules with a PMT read-out. The lead-glass acts both as the active volume for Cherenkov light generation and also as the medium for the development of the electromagnetic shower. As in any new detection system, the commissioning brought some unexpected challenges. The challenges were connected both with readout electronics and with the assembly of magnetic shielding and PMT. This talk will mainly focus on the commissioning in general and on a solution to the troubles with PMT and magnetic shielding. The symptoms will be shown and the reason and solution will be discussed in detail.
| Topic | Detectors and new facilities |
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