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T: Fachverband Teilchenphysik

T 36: Search for Dark Matter II

T 36.1: Vortrag

Dienstag, 17. März 2026, 16:15–16:30, AM 00.014

A large-diameter, dual-phase liquid xenon TPC in the unshielded PANCAKE facility — •Sebastian Lindemann — University of Freiburg, Germany

Future liquid xenon (LXe) based observatories searching for rare processes, such as XLZD, require testing of large components and sub-assemblies in cryogenic liquid or gaseous xenon environments. In this talk, I will present results from operating a 1.5 m diameter, 3 cm deep, dual-phase LXe time projection chamber (TPC) in the unshielded PANCAKE platform without underground suppression of cosmic ray backgrounds.

Measurements of various detector- and LXe-specific quantities, such as the electron lifetime dependent on purity and the electron drift velocity dependent on electric field, demonstrate that operating a large-diameter TPC is feasible in a high-background environment.

Keywords: Liquid xenon; TPC; Dark Matter; Electrodes