The Electromagnetic Calorimetry of the PANDA Detector at FAIR

The PANDA collaboration at FAIR, Germany, will focus on undiscovered charm-meson states and glueballs in antiproton annihilations to study QCD phenomena in the non-perturbative regime. For fixed target experiments at the storage ring HESR a 4π-detector for tracking, particle ID and calorimetry is un...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.404 (1), p.12063-7
Main Author: Novotny, R W
Format: Article
Language:English
Subjects:
Antiparticles
Antiprotons
Avalanche diodes
Calorimetry
Charm (particle physics)
Crystals
Detectors
Digitization
Heat measurement
Lead tungstates
Photons
Physics
Quantum chromodynamics
Radiation damage
Response functions
Sampling
Spectrometers
Tetrodes
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Summary:The PANDA collaboration at FAIR, Germany, will focus on undiscovered charm-meson states and glueballs in antiproton annihilations to study QCD phenomena in the non-perturbative regime. For fixed target experiments at the storage ring HESR a 4π-detector for tracking, particle ID and calorimetry is under development and construction to operate at high annihilation rates up to 20 MHz. The electromagnetic calorimeters are composed of a target spectrometer (EMC) based on PbWO4 crystals and a shashlyk-type sampling calorimeter at the most forward region. The EMC, comprising more than 15,000 crystals, is operated at a temperature of −25°C and read-out via large-area avalanche photo-diodes or vacuum phototriodes/tetrodes. The photo sensor signals are continuously digitized by sampling ADCs. More than 50 of the high quality PWO-II crystals are delivered and tested. The excellent performance with respect to energy, time and position information was determined over a shower energy range from 10 MeV up to 15 GeV by operating several prototype detectors. In addition, the concept of stimulated recovery has been investigated to recover radiation damage on- and off-line during the calorimeter operation. Besides the overall concept of the target spectrometer the response function of the shashlyk spectrometer down to photon energies even below 100 MeV is presented.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/404/1/012063