Regensburg 2025 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 5: Instrumentation, Microscopy and Tomography with X-ray Photons, Electrons, Ions and Positrons

KFM 5.6: Vortrag

Montag, 17. März 2025, 16:30–16:45, H9

TwinPALS: A Digital Twin for Laboratory-Based Positron Annihilation Lifetime Spectroscopy — •Dominik Boras — Julius-Maximilians University, Würzburg, Germany

In this work, we present a comprehensive digital twin of a laboratory-based Positron Annihilation Lifetime Spectroscopy (PALS) system. This digital twin is capable of simulating entire spectra while incorporating all effects of the hardware used in the PALS system, as well as varying source strengths. For the first time, it is possible to visualize unwanted components within the lifetime spectrum and assess their impact on the interpretability of these spectra. The digital twin enables the identification of issues within one's own setup and allows for digital testing of potential optimizations before physical implementation. The TwinPALS system is designed in a modular structure. The first module is responsible for constructing the digital world, taking into account the influences of position, dimension, and the materials used. The second module combines a customized version of the DLTPulsgenerator with software to process the information from the first module, incorporating considerations of radioactivity, positron lifetime, and PMT blurring. The third and final module serves to visualize the output stream from the second module, utilizing the DDRS4PALS software. In summary, this system is a modular digital twin that can be adapted to the requirements of the system being simulated.

Keywords: Positron Annihilation Lifetime Spectroscopy; Digital Twin Framework; Geant4; PulseGenerator