Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Instrumentierung
HK 27.8: Vortrag
Dienstag, 18. März 2014, 18:30–18:45, HZ 8
CALIFA at R3B: Recent developments at TU Darmstadt — •Alexander Ignatov, Ilja Homm, Guillermo Fernández Martinez, Stoyanka Ilieva, Thorsten Kröll, Han-Bum Rhee, Mirko von Schmid, and Christian Sürder for the R3B collaboration — Technische Universität Darmstadt, Darmstadt, Germany
CALIFA is a calorimeter and spectrometer that aims to detect gamma-rays and light charged particles. It is a part of the R3B experiment at the future FAIR facility. CALIFA is a highly segmented detector surrounding the target to allow the measurement of the emission angle and energy of reaction products. The CALIFA barrel consists of CsI(Tl) scintillating crystals, which are individually read out with Avalanche Photodiodes. Therefore, a gain monitoring system is needed. In this work we propose to use light signals from a pulsed LED, distributed to the detector elements via optical fibres, to monitor gain variations. The CALIFA Forward EndCap is the part of the detector, which covers forward emission angles, where Lorentz boosted gamma-rays have maximum energy. Moreover, protons of the same energy may be detected in this forward region. Therefore, the CALIFA EndCap should posess high detection efficiency and the ability to discriminate detected particles by type. We present here our research on using LaBr3(Ce) and CeBr3 scintillators read out with Avalanche Photodiods and Silicon Photomultipliers.
This work is supported by BMBF (06DA9040I, 05P12RDFN8) and HIC for FAIR.