Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Instrumentation 6

HK 14.1: Gruppenbericht

Montag, 23. März 2015, 17:00–17:30, M/HS4

The PANDA backward calorimeter — Heybat Ahmadi^1,2, Samer Ahmed², •Luigi Capozza^2,3, Alaa Dbeyssi^2,3, Malte Deiseroth^1,2, Bertold Fröhlich^2,3, Dmitry Khaneft^1,2, Dexu Lin^2,3, Frank Maas^2,3, María Carmen Mora Espí^2,3, Cristina Morales Morales^2,3, Oliver Noll^1,2, David Rodríguez Piñeiro^2,3, Roserio Valente^1,2, Manuel Zambrana^1,2, and Iris Zimmermann^2,3 — ¹Johannes Gutenberg-Universität Mainz — ²Helmholtz-Institut Mainz — ³GSI Helmholtzzentrum für Schwerionenforschung GmbH

The PANDA experiment at FAIR is being devised for a broad physics programme in hadron structure and spectroscopy. Full and accurate reconstruction of scattering events, reliable particle identification and an almost complete solid angle coverage are required. An important tool for meeting this requirements will be the electromagnetic calorimeter (EMC). It is required to measure particle energies ranging from some MeVs to several GeVs with a relative resolution of 1%⊕ 2%/√E/GeV, assuring a compact geometry and radiation hardness at the same time. For these reasons PbWO₄ was chosen as scintillation material. The whole calorimeter has been designed in three sections: a forward end-cap, a central barrel and a backward end-cap (BWEC). The BWEC, under development at Mainz, will cover scattering polar angles between 140^∘ and 170^∘ and will be made of 524 PbWO₄ crystals. The scintillation light will be detected by large area avalanche photodiodes which will be read out by customised front-end ASIC chips. A status report on the development of the BWEC will be given in this contribution.