3 research outputs found
Development and characterisation of high-resolution microcalorimeter detectors for the ECHo-100k experiment
The goal of the ECHo experiment is a direct determination of the absolute
scale of the neutrino mass by the analysis of the end-point region of the
Ho-163 electron capture (EC) spectrum. The results of the first phase of the
experiment, ECHo-1k, have paved the way for the current phase, ECHo-100k, which
aims at a sensitivity below 2 eV on the effective electron neutrino mass. In
order to reach this goal, a new generation of high-resolution magnetic
microcalorimeters with embedded Ho-163 have been developed and characterised.
The design has been optimised to meet all the challenging requirements of the
ECHo-100k experimental phase, such as excellent energy resolution, wafer scale
implantation and multi-chip operation with multiplexing read-out. We present
the optimisation studies, the final design of the detector array and the first
characterisation studies. The results demonstrate that the detectors fully
match and even surpass the requirements for the current experimental phase,
ECHo-100k
The Electron Capture in Ho Experiment - a Short Update
The definition of the absolute neutrino mass scale is one of the main goals of the Particle Physics today. The study of the end-point regions of the β- and electron capture (EC) spectrum offers a possibility to determine the effective electron (anti-)neutrino mass in a completely model independent way, as it only relies on the energy and momentum conservation.
The ECHo (Electron Capture in 163Ho) experiment has been designed in the attempt to measure the effective mass of the electron neutrino by performing high statistics and high energy resolution measurements of the 163 Ho electron capture spectrum. To achieve this goal, large arrays of low temperature metallic magnetic calorimeters (MMCs) implanted with with 163Ho are used. Here we report on the structure and the status of the experiment