Frankfurt 2014 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 46: Poster
HK 46.81: Poster
Thursday, March 20, 2014, 16:00–18:00, HZ Poster
CALIFA at R3B: Development of Quality Assurance system for APD — •Han-Bum Rhee, Alexander Ignatov, Stoyanka Ilieva, Thorsten Kröll, and Mirko von Schmid for the R3B collaboration — Technische Universität, 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. The CALIFA barrel consists of CsI(Tl) scintillating crystals, which are individually read out with Avalanche Photodiodes. While APDs are insensitive to magnet fields, its gain depends with temperature and voltage. Therefore, we have developed and built the quality assurance testing system for double APDs. In order to control the temperature, we made a water circulation system. We use a light signal from a pulsed LED,which is distributed to the active area of the APDs, to measure the gain variation of APD. In this presentation, we explain the concept of the QA testing system and report the results of the QA test.
This work is supported by BMBF(06DA9040I,05P12RDFN8) and HIC for FAIR.