SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 116: Neutrinos Legend, Neutrino Theory

T 116.2: Vortrag

Donnerstag, 23. März 2023, 16:05–16:20, POT/0251

Trace gas analysis of unpurified and purified liquid argon by mass spectrometry for LEGEND — •Christoph Vogl, Martin Guevara, Alice Ortmann, and Stefan Schönert — Physics Department, TU-Munich

Liquid argon is commonly used as a medium for particle detection in rare event searches and particle physics experiments. Its performance is heavily impaired in the presence of electronegative impurities, typically oxygen, nitrogen, and water. The chemical purity of liquid argon can be assessed indirectly by measuring its scintillation properties. A complementary and direct way of determining purity is through mass spectrometry. In this talk, we will present our new quadrupole mass spectrometer setup (IDEFIX) and discuss the main challenges and solutions. Results are shown regarding the assessment of the chemical composition of commercial and in-house purified liquid and gaseous argon. This research is supported by the BMBF through the Verbundforschung 05A20WO2 and by the DFG through the Excellence Cluster ORIGINS.