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T: Fachverband Teilchenphysik

T 23: Experimental Techniques in Astroparticle Physics 1

T 23.3: Talk

Monday, March 21, 2022, 16:45–17:00, T-H36

Towards a low background SDD for IAXO — David Casado Moran^1,2, Frank Edzards^1,2, Thibaut Houdy³, Susanne Mertens^1,2, Juan Pablo Ulloa Beteta^1,2, •Christoph Wiesinger^1,2, and Michael Willers^1,2 — ¹Max-Planck-Institut für Physik, München — ²Physik-Department, Technische Universität München, Garching — ³IJCLab, Université Paris-Saclay, Paris

The International Axion Observatory (IAXO) is aiming to detect solar axions, as they are converted into X-rays in a strong magnet pointing towards the sun. Excellent spectroscopic performance, high X-ray absorption efficiency at and below 10 keV and potential for ultra-low background operations are features of Silicon Drift Detectors (SSDs) that could facilitate this search. First measurements in the Munich shallow underground laboratory have shown promising background performance. Dedicated low-background designs, following a conventional passive shielding strategy and a novel all-semiconductor active shield approach, are under development. In this talk, we will report on the latest achievement towards a low background SDD for IAXO.