Research Information System
Acta Physica Polonica B, Proceedings Supplement, vol.17, no.3, 2024 (Scopus)
In recent years, a great deal of effort has been devoted to developing arrays of highly segmented germanium detectors, signal-processing electronics, and γ-ray tracking algorithms. With this advancement, the interaction points associated with a particular γ-ray can be identified in terms of spatial coordinates and deposited energy. The tracking provides the direction of the γ-ray emission and the position of its first interaction inside the detector. The detectors have a complex geometry and require sophisticated characterization/scanning systems. The prime objective of the present work is to improve the GSI 3D scanning system, particularly regarding position detector readout, its resilience, and speed, allowing for faster scanning of the entire segmented detector. In the proposed advancement, Silicon PhotoMultiplier (SiPM), i.e., an array of square Avalanche PhotoDiodes, is employed to replace the previous position-sensitive Photo Multiplier Tube. A scanning device using a LYSO scintillator crystal coupled to an array of 96 position-sensitive SiPMs has been developed and coupled with a GSI-developed electronics TAMEX system. Before scanning any segmented detector, the scanner has been fully characterized. The work presents preliminary results of the performance evaluation and characterization of the new γ-ray scanner at GSI, Germany.