Performance of the prototype of the electromagnetic calorimeter for PANDA

M. Kavatsyuk , D. Bremer , V. Dormenev , P. Drexler , T. Eissner , W. Erni , E. Guliyev , T. Hennino (1) , B. Krusche , B. Lewandowski , H. Löhner , M. Moritz , R.W. Novotny , K. Peters , J. Pouthas (1) , P. Rosier (1) , M. Steinacher , G. Tambave , A. Wilms

1 IPNO - Institut de Physique Nucléaire d'Orsay

The PANDA collaboration at FAIR, Germany, will employ antiproton annihilations to investigate yet undiscovered charm-meson states and glueballs. The aim is to study QCD phenomena in the non-perturbative regime and to unravel the origin of hadronic masses. A multi-purpose detector for tracking, calorimetry and particle identification is presently being developed to run at high luminosities providing up to 2×107 interactions/s. One of the crucial components of the PANDA spectrometer is the Electromagnetic Calorimeter, composed of cooled PbWO4 crystals. This paper describes construction and performance of a fully functioning prototype of this calorimeter. The performance was determined from measurements exploiting cosmic muons and high-energy tagged photons from the MAMI-C electron accelerator. The response measurements were carried out using sampling ADCs and, for comparison, charge-integrating ADCs. The achieved results validate the usage of sampling ADCs with a moderate sampling frequency, provide the energy resolution as foreseen in the Technical Design Report of the full calorimeter, and secure event correlation by achieving a good timing resolution through digital analysis of the sampled signals.

Domains: Nuclear Experiment [nucl-ex]; Instrumentation and Detectors [physics.ins-det]

M. Kavatsyuk, D. Bremer, V. Dormenev, P. Drexler, T. Eissner, et al.. Performance of the prototype of the electromagnetic calorimeter for PANDA. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011, 648, pp.77-91. ⟨10.1016/j.nima.2011.06.044⟩. ⟨in2p3-00622454⟩