Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 16: Search for Dark Matter I

T 16.2: Talk

Monday, March 16, 2026, 16:30–16:45, AM 00.014

Design, Development and Characterization of Electrodes for XENONnT and towards XLZD — •Alexey Elykov — Karlsruhe Institute of Technology, Institute for Astroparticle Physics

Dual-phase noble gas time projection chambers (TPCs) lie at the heart of detectors that perform a wide range of rare event searches, spanning from attempts to detect particle dark matter to studies of neutrino physics. High-voltage electrodes are instrumental for the generation and interpretation of signals produced in the TPC.

The XENON collaboration currently operates a state of the art, ∼1.5 m-wide TPC, immersed in 8.9 t of liquid xenon. The XLZD (XENON, LZ, DARWIN) collaboration aims to construct and operate the ultimate xenon-based TPC, which will span ∼3 m in diameter and will host 60 t of liquid xenon. With a keV-range threshold and an ultra-low radioactive background, XLZD will aim to probe the entire parameter space for WIMP dark matter down to the so-called neutrino fog, and will conduct searches for solar axions, axion-like particles, as well as measurements of the solar neutrino flux, and a probe of the Majorana nature of neutrinos.

In this talk, we will present the successful design, development and characterization of ∼1.5 m-scale electrodes for the upgrade of the XENONnT detector and the R&D work towards electrodes for the XLZD detector [1]. This work has been supported in part by the Federal Ministry of Research, Technology and Space (BMFTR) through the grant 05A23VK3 within the ErUM-Pro funding line.
[1] arXiv:2511.16408

Keywords: Dark Matter; Detector R&D; Neutrino; Electrodes; XLZD Observatory