Abstract
The PANDA experiment will be part of the future Facility for Antiproton and Ion Research (FAIR) and aims for the study of strong interaction within the charm sector via antiproton proton collisions up to antiproton momenta of 15 GeV/c. Reflecting the variety of the physics program the PANDA detector is designed as a multi-purpose detector able to perform tracking, calorimetry and particle identification with nearly complete coverage of the solid angle. The Electromagnetic Calorimeter (EMC) contained inside its Target Spectrometer is based on cooled PbWO4 scintillator crystals. In order to ensure an excellent performance throughout the large dynamic range of photon/electron energies ranging from a few MeV up to 15 GeV an extensive prototyping phase is mandatory. This contribution describes the measured response of the EMC barrel part prototype PROTO60 at the largest design energy to secondary beams provided by the SPS at CERN. In addition to PROTO60 a tracking station was deployed, providing precise position information of the 15 GeV/c positrons. For calibration purposes a 150 GeV/c muon beam and cosmic radiation, in combination with estimations from GEANT4 simulations were used. The obtained performance concerning energy, position and time information is presented.
Highlights
The PANDA experiment will be located at the future Facility for Antiproton and Ion Research (FAIR), which is an extension of the existing GSI Helmholtzzentrum fur Schwerionenforschung
The detection of electromagnetic probes in the Forward Spectrometer is performed by a Shashlyk type lead / plastic scintillator sampling calorimeter, while the Target Spectrometer contains an electromagnetic calorimeter based on second generation lead tungstate scintillator crystals (PWO-II) of improved quality, compared
The performance of the first prototype for the PANDA Barrel Electromagnetic Calorimeter (EMC) was measured at its highest design energy with a positron beam of 15 GeV/c momentum
Summary
The PANDA experiment will be located at the future Facility for Antiproton and Ion Research (FAIR), which is an extension of the existing GSI Helmholtzzentrum fur SchwerionenforschungGmbH (GSI) at Darmstadt, Germany. Setup and Readout Previously several successful beam tests with energy marked photons in the range from 50 MeV to 1.5 GeV were performed and are described in detail in [3]. The test experiment described in this work was performed with a positron beam of 50 GeV momentum, representing the highest c design energy of the PANDA EMC.
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