Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Neutrino Physics IV

T 39.6: Vortrag

Dienstag, 1. April 2025, 17:30–17:45, VG 3.104

ECHo-100k Chip characterization — •Neltje Sophie Buermann — Kirchhoff Institute for Physics, Heidelberg University, Germany — ECHo Collaboration

The ECHo experiment is designed to search for the signature of the finite neutrino mass in the endpoint region of the ¹⁶³Ho electron capture spectrum. The first stage of the experiment ECHo-1k has been completed, and now the second stage ECHo-100k is under construction. This stage includes a new metallic magnetic calorimeter array with improved pixel design and thermalization. The foreseen resolution of 4 eV FWHM will be more than a factor two better than the one achieved with the ECHo-1k arrays. In this contribution, we present the results for the newly developed chips and discuss their performance in terms of the ECHo-100k requirements.

Keywords: Electron Capture; Neutrino Mass; Endpoint Region