Göttingen 2025 – scientific programme
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T: Fachverband Teilchenphysik
T 62: Search for Dark Matter III
T 62.5: Talk
Wednesday, April 2, 2025, 17:15–17:30, VG 4.102
Coating-based radon barriers for future liquid xenon detectors — •Sophie Armbruster1, Giovanni Volta1, Hardy Simgen1, and Florian Jörg2 — 1Max Planck Institut für Kernphysik, Heidelberg — 2Universität Zürich
Despite overwhelming evidence for dark matter in our universe, its true nature remains a mystery. In the search for dark matter, detectors using liquid xenon are currently leading in sensitivity. However, these experiments are increasingly limited by self-induced backgrounds, particularly the emanation of radon from detector materials. To address this challenge, a novel radon mitigation technique using surface coatings as radon barrier has been investigated. Systematic studies at the Max Planck Institut für Kernphysik have demonstrated that electrochemical plating with a 5 μm copper layer can reduce radon emanation by up to three orders of magnitude. This technique is currently scaled up for vessel-like geometries with a new setup.
Keywords: Radon mitigation