Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Poster (a)

HK 51.26: Poster

Thursday, April 2, 2020, 16:30–18:30, Zelt

Installation of CALIFA@R3B (GSI) — •Han-Bum Rhee, Anna-Lena Hartig, Noel Merkel, Thorsten Kröll, and Christian Sürder for the R3B collaboration — Institut für Kernphysik, Darmstadt,Germanny

CAIFA is a part of the R3B experiment at GSI and the future FAIR facility. It is a calorimeter and spectrometer that aims to detect gamma rays and light charged particles. CALIFA is divided into a cylindrical barrel and a forward endcap. The forward endcap comprises two distinct detection systems: iPhos and CEPA. The CALIFA barrel and iPhos consist of 2464 CsI(Tl) scintillating crystals, which are individually read out with Avalanche Photodiodes (APDs).

As first versions of CALIFA, the collaboration has built demonstrator arrays and has done several campaigns with these. In preparation of the second FAIR-Phase0 campaign in 2020, the crystals are mounted on the final CALIFA frame and this frame is now located in R3B setup.

Before assembly of the detectors, the temperature dependency on the gain of the APDs was tested. The assembled detector units were characterized regarding the light-output non-uniformity and the energy resolution.

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