Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 22: Instrumentation VI
HK 22.7: Vortrag
Dienstag, 15. März 2016, 15:45–16:00, S1/01 A3
Improved prototype of the backward end - cap PANDA electromagnetic calorimeter at FAIR — Heybat Ahmadi1,2, Samer Ahmed1,2, Alexander Aycock1,2, Luigi Capozza2,3, Alaa Dbeyssi2,3, Frank Maas2,3, •Oliver Noll1,2, and David Rodríguez Piñeiro2,3 for the PANDA collaboration — 1Johannes Gutenberg-Universität Mainz — 2Helmholtz-Institut Mainz — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH
The PANDA experiment wants to achieve a deeper understanding of the strong interaction. It is built at the new accelerator facility FAIR in Darmstadt. The electromagnetic process group in Mainz is developing the backward end-cap (BWEC) of the electromagnetic calorimeter. The prototype (PROTO16) serves for testing the final BWEC components for cooling, insulating, place consumption, photon read-out, electronics and signal transmission. PROTO16 got some major updates in the last year. The aim of these updates has been to improve the signal transmission for a better signal to noise ratio. New line driver boards have been developed. In the frame work of the signal enhancement, the latest version of the PANDA calorimeter preamplifier (APFEL-ASIC 1.5) has been introduced. Besides using geographical addressing, the key advantage is the individual biasing of the avalanche photodiodes. Furthermore, the slow control monitoring has been improved and detector stability has been enhanced. Two beam times with an 855 MeV electron beam at the Mainz Microtron Facility served for testing the improvements. This contribution will discuss the results in terms of signal quality and detector stability.