Erlangen 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster Session

HK 27.28: Poster

Mittwoch, 18. März 2026, 16:15–18:30, Redoutensaal

Radon concentration monitoring for future liquid xenon radon removal systems — •Sakuntha Nirodana Prathapage, Lutz Althueser, Robert Braun, David Koke, Volker Hannen, Christian Huhmann, Ying-Ting Lin, Philipp Schulte, Patrick Unkhoff, Daniel Wenz, and Christian Weinheimer — University of Münster, Germany

In next generation dark matter experiments, such as XLZD, it is important to maintain a low radioactive background inside the detector as the dark matter events are extremely rare and mimicked by background signals. The intrinsic radioactive noble isotope Radon-222, which is continuously emanating from detector materials and its decay progenies contribute to an unshieldable background inside liquid xenon detectors. Continuous cryogenic distillation reduces the radon level by exploiting radon's lower volatility relative to xenon, thereby trapping it within the distillation column where it subsequently decays with a 3.8-day half-life. As a part of the LowRAD project an in-column radon detector is designed and constructed, that exploits the inherent enrichment of radon in the distillation column, which enhances the sensitivity for measuring low initial radon concentrations via scintillation light detection. This will allow the online monitoring of the radon concentration inside the distillation column and in turn the radon concentration of the whole experiment. This poster highlights the design of a 16-PMTs detector within the radon column to continuously monitor radon events in enriched xenon. This work is supported by the EU through the ERC AdG 'LowRad' (101055063).

Keywords: Liquid Xenon; Radon Detection; Cryogenic Distillation