Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Instrumentation XII
HK 36.4: Vortrag
Mittwoch, 28. Februar 2018, 14:45–15:00, HZO 90
CALIFA at R3B: The Q.A test stand and the gain monitoring system — •Han-Bum Rhee, Anna-Lena Hartig, Alexander Ignatov, and Thorsten Kröll for the R3B collaboration — Institut für Kernphysik, TU 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 GSI and the future FAIR facility. The functional units for the CALIFA demonstrator are called petals containing 64 CsI(Tl) crystals with APD readout each. Before assembling the detection units, a precise study of individual parts has to be done. This project aims to develop a quality assurance test stand for the APDs and crystals characterisation. Particularly, the inhomogeneity of the crystal light output is investigated with a collimated source.
The gain monitoring system (GMS) using the light signal from a pulsed LED is being developed by our group. The GMS distributes the signal to the detector elements via optical fibers and monitors the gain variance. In addition, our group developed a dedicated connetor PCB for the APD. PCB is used not only for the connection with the preamplifier, but also for the gain monitoring optical fiber and temperature sensor.
This work is supported by the German BMBF (05P15RDFN1), HIC for FAIR and GSI-TU Darmstadt cooperation contract.