Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 47: Axions/ALPs II
T 47.7: Vortrag
Mittwoch, 2. April 2025, 17:45–18:00, VG 0.110
Development for an all semiconductor active-shield Detectors for IAXO — •Juan Pablo Ulloa Beteta1, Susanne Mertens2, Lucinda Schönfeld2, Christoph Wiesinger1, Michael Willers1, and Patrick Bongratz2 for the IAXO collaboration — 1Physik- Department, Technische Universität München, Garching, DE — 2Max Planck Institut für Kernphysik, Heidelberg, DE
The search for axions - a solution to the strong CP problem and a promising candidate for cold dark matter - is at the heart of the International Axion Observatory (IAXO). This next-generation helioscope experiment seeks to detect solar axions by converting them into X-ray photons. A critical challenge in achieving the required sensitivity for IAXO is the suppression of background caused by radioactivity and cosmic radiation. To address this, we are developing a novel all-semiconductor active-shield detector system. The system consists of a single-pixel Silicon Drift Detector (SDD) embedded within a High-Purity Germanium (HPGe) well-type detector, which serves as an active shielding to suppress background events. I will discuss the design progress and characterization studies of both the SDD and the HPGe detector, focusing on their energy resolution and noise performance. This project has received funding from the European Research Council (ERC) under the European Union Horizon 2020 research and innovation programme (grant agreement No. 852845). It has also been supported by the DFG through the Excellence Cluster ORIGINS.
Keywords: Axions; Rare Event Search; X-ray detection; Silicon Drift Detector; Germanium Detector