Prototyping a High Purity Germanium cryogenic veto system for a bolometric detection experiment
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909769386688512 |
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| author | Goupy, Chloé Marnieros, Stefanos Mauri, Beatrice Nones, Claudia Vivier, Matthieu |
| author_facet | Goupy, Chloé Marnieros, Stefanos Mauri, Beatrice Nones, Claudia Vivier, Matthieu |
| contents | The use of High Purity Germanium detectors operated in ionization mode at cryogenic temperatures is investigated as an external background mitigation solution for bolometers used in rare-event search experiments. A simple experimental setup with very partial coverage, running a 52-g $\mathrm{Li_2WO_4}$ bolometer sandwiched in-between two 2-cm thick High Purity Germanium cylindrical detectors in a dry cryostat, shows promising rejection to environmental gammas and atmospheric muons backgrounds. The acquired data are used together with a Monte Carlo simulation of the setup to extract the main contributions to the external backgrounds expected in an above ground experiment, such as e.g.~current and future experimental efforts targeting the detection of coherent elastic neutrino-nucleus scattering at reactor facilities. Based on all these results, a $\mathrm{4π}$ coverage similar veto system achieving a $\mathcal{O}$(10 keV) energy threshold is expected to achieve a $\mathrm{\gtrsim}$ 70 \% and a $\mathrm{\gtrsim}$ 97 \% rejection power for gamma-like and muon-like events, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_09837 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Prototyping a High Purity Germanium cryogenic veto system for a bolometric detection experiment Goupy, Chloé Marnieros, Stefanos Mauri, Beatrice Nones, Claudia Vivier, Matthieu High Energy Physics - Experiment Instrumentation and Detectors The use of High Purity Germanium detectors operated in ionization mode at cryogenic temperatures is investigated as an external background mitigation solution for bolometers used in rare-event search experiments. A simple experimental setup with very partial coverage, running a 52-g $\mathrm{Li_2WO_4}$ bolometer sandwiched in-between two 2-cm thick High Purity Germanium cylindrical detectors in a dry cryostat, shows promising rejection to environmental gammas and atmospheric muons backgrounds. The acquired data are used together with a Monte Carlo simulation of the setup to extract the main contributions to the external backgrounds expected in an above ground experiment, such as e.g.~current and future experimental efforts targeting the detection of coherent elastic neutrino-nucleus scattering at reactor facilities. Based on all these results, a $\mathrm{4π}$ coverage similar veto system achieving a $\mathcal{O}$(10 keV) energy threshold is expected to achieve a $\mathrm{\gtrsim}$ 70 \% and a $\mathrm{\gtrsim}$ 97 \% rejection power for gamma-like and muon-like events, respectively. |
| title | Prototyping a High Purity Germanium cryogenic veto system for a bolometric detection experiment |
| topic | High Energy Physics - Experiment Instrumentation and Detectors |
| url | https://arxiv.org/abs/2401.09837 |