SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 90: Neutrinos, Dark Matter X

T 90.3: Vortrag

Mittwoch, 22. März 2023, 18:00–18:15, HSZ/0002

Radon mitigation in current and future liquid xenon detectors — •Florian Jörg for the XENON collaboration — Max-Planck-Institut für Kernphysik Heidelberg, Germany

Dual-phase liquid xenon time projection chambers have become a leading technology for rare-event searches such as the direct detection of particle dark matter. The sensitivity of current experiments is limited by the xenon-internal background from ²²²Rn. Therefore, techniques for radon mitigation are applied during all stages of the experiment.

The XENONnT detector belongs to the latest generation of liquid xenon detectors and has reached an unprecedented low radon concentration of <1 µBq/kg. This achievement was driven by a thorough material pre-selection in combination with a novel radon removal system. In-situ measurements of its radon concentration during scientific data taking will be presented. Furthermore, recent results from a novel radon mitigation method using surface coatings will be discussed.