Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 60: Methods in Astroparticle Physics III

T 60.5: Vortrag

Mittwoch, 18. März 2026, 17:15–17:30, KS 00.004

Fabrication and characterization of MMC arrays for the ECHo-LE — •Krittika Sarkar for the ECHo collaboration — Kirchhoff Institute für Physik

The Electron Capture in Holmium-163 (ECHo) experiment is designed for the determination of the electron neutrino mass using the analysis of the 163-Holmium electron capture spectrum. It uses low temperature detectors called metallic magnetic calorimeters (MMCs) to measure the electron capture decay in samples of Holmium-163 that are implanted inside the MMCs. Each MMC pixel contains Ho-163 upto an activity of 10Bq. ECHo-LE aims to simultaneously operate ~20,000 such MMC detectors. Ten wafers hosting 40 arrays each will be fabricated. A quality check produce will be defined in order to confine the suitability of the arrays for the Holmium 163 implantation and therefore to be used in the experiment. Two such wafers have been fabricated and characterised. We present the quality control results obtained for the first two fabricated wafers and discuss the fabrication yield and its implications for the preparation of the ECHo-LE experiment.

Keywords: Neutrino mass; Electron capture by 163 Ho; Low temperature detectors; Quantum sensors