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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.47: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium

Investigation of the response of the CALIFA demonstrator — •Han-Bum Rhee, Anna-Lena Hartig, Thorsten Kröll, and Christian Sürder for the R3B collaboration — Institut für KernPhysik, Darmstadt, Germany

CALIFA is a calorimeter and spectrometer that aims to detect γ-rays and light charged particles. It is a part of the R3B experiment at GSI and the future FAIR facility. CALIFA is divided into a cylindrical barrel and a forward end-cap. The CALIFA barrel consist of CsI(Tl) scintillating crystals, which are individually read out with Avalanche Photodiodes(APDs). The functional units for the CALIFA demonstrator are called PETALs containing 64 crystals each. The PETALs are built using the same construction procedures, materials and elements as for CALIFA.
In this work, I have tested a PETAL in the laboratory of the institute of nuclear physics(IKP), TU Darmstadt. The basic properties of the detection unit, the event reconstruction and particle identification have been checked. In addition the measurement programs have been simulated to be compared to the data. R3BRoot, which is an analysis and simulation toolkit of the R3B experiment, was used. Several measurements were done, for which different sources were used: an AmBe source(γ-rays, fast neutrons), thermalized neutrons (high-energy γ rays via capture process) and muons from cosmic rays.

This work is supported by German BMBF(05P15DFN1,05P19RDFN1), HIC for FAIR and GSI-TU Darmstadt cooperation contract.