Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Poster
HK 48.7: Poster
Wednesday, March 25, 2015, 17:00–19:00, C/Foyer
Development of a Prototype for the Backward End-Cap for the PANDA Electromagnetic Calorimeter at FAIR — Heybat Ahmadi1, Samer Ahmed2, Luigi Capozza3, Alaa Dbeyssi3, Malte Deiseroth1, Bertold Fröhlich3, Dmitry Khaneft1, Dexu Lin3, Frank Maas3, María Carmen Mora Espí3, Cristina Morales Morales3, •Oliver Noll1, David Rodríguez Piñeiro3, Roserio Valente1, Manuel Zambrana1, and Iris Zimmermann3 — 1UNI-MAINZ/HIM — 2HIM — 3HIM/GSI
We have developed a prototype (PROTO16) for the backward end-cap (BWEC) of the PANDA electromagnetic calorimeter. The aim has been to test as much as possible the final details concerning crystal read out and insulation system of the BWEC. This ranges from equipping the scintillator material lead tungstate (PWO) with large area avalanche photodiodes (APDs) and ASIC-Preamplifiers (APFEL) of the last generation to the insulating material of Vacuum-Insulation-Panels (VIP) and Aerogel up to a fully executable slow control- and data acquisition system. Moreover innovative methods for subsystems like the high precision calibration system for thermal sensors have been realized reaching a new level of accuracy. Due to the high light yield variation of PWO with temperature this is an important ingredient to reach the required good energy resolution. As a result, it is possible to monitor relative and absolute temperature differences in the prototype with a precision of 0.1 °C. The prototype has been tested at the tagged photon beam of the MAMI electron accelerator in Mainz in July 2014. Design concept, realization and test results will be presented.