Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 17: Kalorimeter

T 17.2: Vortrag

Montag, 25. März 2019, 16:15–16:30, ST 1

Study of High Resolution, DOI-Capable Gamma Detectors — •Federica Demattè, Thomas Dey, Pierre Gebhardt, Nicolas Gross-Weege, Florian Müller, David Schug, Björn Weissler, Laiyin Yin, and Volkmar Schulz — Department of Physics of Molecular Imaging Systems, Institute of Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany

In gamma detectors, high spatial resolution can be achieved using pixelated scintillators. A specific segmentation of the scintillator on both the x- and y-axis allows the three dimensional reconstruction of the light emission point in the crystal. Thus, the position of the incoming gamma can be estimated precisely. The prerequisite for this reconstruction is the precise alignment of the detector components. Without a careful match between a Silicon Photomultiplier (SiPM) array and the crystal, it is not possible to reconstruct the Depth Of Interaction information needed for a sub-millimeter spatial resolution.

This talk will introduce a compact pixelated gamma calorimeter formed by a PDPC DPC-3200 sensor tile, a pixelated scintillator and a lightguide, as e.g. used in the European Hypmed project. Furthermore, the alignment tool used for the high precision mounting of the detector components will be presented.