Speaker
Description
The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) is a highly sensitive Dark Matter experiment situated at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, with the capability to detect nuclear recoils down to 10 eV, making it one of the top experiments for probing the sub-GeV mass-parameter space.
However, distinguishing between Dark Matter recoils and beta-particles/gamma-rays at such low energies is hardly possible. Therefore, it is essential to understand the composition of radioactive background in the experimental reference data. This information can be utilised in an analysis to search for Dark Matter signals and enhance future detector modules, e.g. by improving the radiopurity of used materials.
Recently, the electromagnetic background model for CRESST-II has been significantly improved, and an extension to newer CRESST-III detector modules was made. The improvements include various simulated radiogenic and cosmogenic sources of radioactivity, the incorporation of more material screening results, a comprehensive description of the new detector modules, and a likelihood fit of the simulated spectral templates to the measured data.
This contribution will present enhanced background models of the detector module TUM40, as well as first background models of the Lise and the Detector A module.
| Submitted on behalf of a Collaboration? | Yes |
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