Beam studies of SAD-150 heavy crystal PWO calorimeter, small angle multiphoton detector of GAMS-4π spectrometer
1999
Abstract Small Angle Detector (SAD-150) is a PbWO 4 heavy crystal electromagnetic calorimeter with high energy and coordinate resolution for multiphoton events. It has been included in the GAMS-4π setup and calibrated in muon and electron beams. Test measurements of forward emitted π 0 and η in the π − p charge exchange reactions with 32.5 GeV/ c π − at the IHEP proton synchrotron are reported. The measured mass resolution in the η region agrees with the design value. SAD-150 performance does not deteriorate with π − intensities up to 10 6 π − /s per cell.
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