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.

Alfonso, K., Armatol, A., Augier, C., Avignone, F., Azzolini, O., Balata, M., et al. (2023). A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat. JOURNAL OF INSTRUMENTATION, 18(6) [10.1088/1748-0221/18/06/p06033].

A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat

Barresi A.;Beretta M.;Biassoni M.;Branca A.;Brofferio C.;Capelli S.;Carniti P.;Chiesa D.;Clemenza M.;Cremonesi O.;Dell'Oro S.;Faverzani M.;Ferri E.;Giachero A.;Girola M.;Gironi L.;Gorla P.;Gotti C.;Nastasi M.;Nutini I.;Pattavina L.;Pavan M.;Pessina G.;Pozzi S.;Previtali E.;Puiu A.;Sisti M.;
2023

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.
Articolo in rivista - Articolo scientifico
Cryogenic detectors; Gamma detectors (scintillators, CZT, HPGe, HgI etc); Photon detectors for UV, visible and IR photons (solid-state); X-ray detectors;
English
29-giu-2023
2023
18
6
P06033
open
Alfonso, K., Armatol, A., Augier, C., Avignone, F., Azzolini, O., Balata, M., et al. (2023). A first test of CUPID prototypal light detectors with NTD-Ge sensors in a pulse-tube cryostat. JOURNAL OF INSTRUMENTATION, 18(6) [10.1088/1748-0221/18/06/p06033].
File in questo prodotto:
File Dimensione Formato  
10281-436478_VoR.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 5.88 MB
Formato Adobe PDF
5.88 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/436478
Citazioni
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 0
Social impact