SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 118: Dark Matter II

T 118.1: Vortrag

Donnerstag, 23. März 2023, 15:50–16:05, POT/0006

R&D of large-scale electrodes for future generation TPCs — •Vera Hiu-Sze Wu, Alexey Elykov, and Francesco Toschi — Karlsruhe Institute of Technology, Institute for Astroparticle Physics

The DARk matter Wimp search with liquid xenoN (DARWIN) observatory is a future dark matter detector aiming at reaching the sensitivity for WIMPs at the neutrino floor and covering the mass range from 5 GeV/c2 to above 10 TeV/c2 [1]. The observatory uses the technology of a dual-phase time projection chamber (TPC) with a 40 t active volume of liquid xenon (LXe) [1].

The electrodes of the TPC are the vital components for 3D position reconstruction of the signal, benefiting the event selection processes. When designing the electrodes, we have to calculate and optimize the electrostatic. At the same time, the mechanical stability, the feasibility of manufacturing and treatment, as well as to minimization of spark and electron emission has to be ensured. Here we present our investigations of hexagonal mesh electrodes, including mechanical stability and handling as well as the first test of local high-voltage field emission.

[1] J. Aalbers et al., J. Cosmol. Astropart. Phys., 11, 017 (2016)