Characterization of low temperature metallic magnetic calorimeters having gold absorbers with implanted $^{163}$Ho ions

TL;DR

This study demonstrates that low temperature metallic magnetic calorimeters with implanted $^{163}$Ho ions maintain their performance, enabling high-precision energy spectrum measurements for electron capture studies.

Contribution

First investigation of fully micro-fabricated MMCs with implanted $^{163}$Ho ions, showing implantation does not impair detector performance and proposing an optimized design for future experiments.

Findings

Implantation dose does not compromise detector properties

Performance of implanted and non-implanted detectors is comparable

Optimized detector design suitable for $^{163}$Ho experiments

Abstract

For the first time we have investigated the behavior of fully micro-fabricated low temperature metallic magnetic calorimeters (MMCs) after undergoing an ion-implantation process. This experiment had the aim to show the possibility to perform a high precision calorimetric measurement of the energy spectrum following the electron capture of $^{163}$Ho using MMCs having the radioactive $^{163}$Ho ions implanted in the absorber. The implantation of $^{163}$Ho ions was performed at ISOLDE-CERN. The performance of a detector that underwent an ion-implantation process is compared to the one of a detector without implanted ions. The results show that the implantation dose of ions used in this experiment does not compromise the properties of the detector. In addition an optimized detector design for future $^{163}$Ho experiments is presented.