A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat Full article
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Journal of Instrumentation
ISSN: 1748-0221 |
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| Output data | Year: 2023, Volume: 18, Number: 6, Article number : P06033, Pages count : 18 DOI: 10.1088/1748-0221/18/06/P06033 | ||||
| Tags | Cryogenic detectors; Gamma detectors (scintillators, CZT, HPGe, HgI etc); Photon detectors for UV, visible and IR photons (solid-state); X-ray detectors | ||||
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Abstract:
CUPID is a next-generation bolometric experiment aiming at searching for neutrinoless
double-beta decay with ∼ 250 kg of isotopic mass of 100Mo. It will operate at ∼ 10 mK in a cryostat
currently hosting a similar-scale bolometric array for the CUORE experiment at the Gran Sasso
National Laboratory (Italy). CUPID will be based on large-volume scintillating bolometers consisting
of 100Mo-enriched Li2MoO4 crystals, facing thin Ge-wafer-based bolometric light detectors. In
the CUPID design, the detector structure is novel and needs to be validated. In particular, the
CUORE cryostat presents a high level of mechanical vibrations due to the use of pulse tubes and
the effect of vibrations on the detector performance must be investigated. In this paper we report
the first test of the CUPID-design bolometric light detectors with NTD-Ge sensors in a dilution
refrigerator equipped with a pulse tube in an above-ground lab. Light detectors are characterized in
terms of sensitivity, energy resolution, pulse time constants, and noise power spectrum. Despite the
challenging noisy environment due to pulse-tube-induced vibrations, we demonstrate that all the
four tested light detectors comply with the CUPID goal in terms of intrinsic energy resolution of
100 eV RMS baseline noise. Indeed, we have measured 70–90 eV RMS for the four devices, which
show an excellent reproducibility. We have also obtained high energy resolutions at the 356 keV line
from a 133Ba source, as good as Ge semiconductor 𝛾 detectors in this energy range.
Cite:
Alfonso K.
, Armatol A.
, Augier C.
, Avingone III F.T.
, Azzolini O.
, Balata M.
, Barabash A.S.
, Belini F.
, Benato G.
, Shlegel V.N.
, Zolotarova A.S.
A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat
Journal of Instrumentation. 2023. V.18. N6. P06033 :1-18. DOI: 10.1088/1748-0221/18/06/P06033 WOS Scopus РИНЦ OpenAlex
A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat
Journal of Instrumentation. 2023. V.18. N6. P06033 :1-18. DOI: 10.1088/1748-0221/18/06/P06033 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Apr 11, 2023 |
| Accepted: | May 29, 2023 |
| Published print: | Jun 29, 2023 |
| Published online: | Jun 29, 2023 |
Identifiers:
| Web of science: | WOS:001084428300002 |
| Scopus: | 2-s2.0-85164218788 |
| Elibrary: | 61961125 |
| OpenAlex: | W4364387588 |