Test of 116CdWO4 and Li2MoO4 scintillating bolometers in the CROSS underground facility with upgraded detector suspension

Ahmine, A.; Bandac, I. C.; Barabash, A. S.; Berest, V.; Bergé, L.; Calvo-Mozota, José María; Carniti, P.; Chapellier, M.; Dafinei, I.; Danevich, F. A.; Dixon, T.; Dumoulin, L.; Ferri, F.; Giuliani, A.; Gott, C.; Gras, P.; Helis, D. L.; Ianni, A.; Imbert, L.; Khalife, H.; Kobychev, V. V.; Konovalov, S. I.; Loaiza, P.; de Marcillac, P.; Marnieros, S.; Marrache-Kikuchi, C. A.; Martinez, M.; Nones, C.; Olivieri, E.; Ortiz de Solórzano, A.; Peinaud, Y.; Pessina, G.; Poda, D. V.; Redon, Th.; Rosier, Ph.; Scarpaci, J. A.; Tretyak, V. I.; Umatov, V. I.; Velázquez, M.; Zarytskyy, M. M.; Zolotarova, A.

Autor:

Ahmine, A.

;

Bandac, I. C.

;

Barabash, A. S.

;

Berest, V.

;

Bergé, L.

;

Calvo-Mozota, José María

;

Carniti, P.

;

Chapellier, M.

;

Dafinei, I.

;

Danevich, F. A.

;

Dixon, T.

;

Dumoulin, L.

;

Ferri, F.

;

Giuliani, A.

;

Gott, C.

;

Gras, P.

;

Helis, D. L.

;

Ianni, A.

;

Imbert, L.

;

Khalife, H.

;

Kobychev, V. V.

;

Konovalov, S. I.

;

Loaiza, P.

;

de Marcillac, P.

;

Marnieros, S.

;

Marrache-Kikuchi, C. A.

;

Martinez, M.

;

Nones, C.

;

Olivieri, E.

;

Ortiz de Solórzano, A.

;

Peinaud, Y.

;

Pessina, G.

;

Poda, D. V.

;

Redon, Th.

;

Rosier, Ph.

;

Scarpaci, J. A.

;

Tretyak, V. I.

;

Umatov, V. I.

;

Velázquez, M.

;

Zarytskyy, M. M.

;

Zolotarova, A.

Fecha:

2023

Palabra clave:

CROSS experiments; scintillating bolometers; Scopus

Revista / editorial:

Journal of Instrumentation

Citación:

Ahmine, A., Bandac, I. C., Barabash, A. S., Berest, V., Bergé, L., Calvo-Mozota, J. M., ... & Zolotarova, A. (2023). Test of 116CdWO4 and Li2MoO4 scintillating bolometers in the CROSS underground facility with upgraded detector suspension. Journal of Instrumentation, 18(12), P12004.

Tipo de Ítem:

article

Resumen:

In preparation for the CROSS experiment to search for double-beta (2β) decay of 100Mo, we upgraded a low-background facility at the Canfranc underground laboratory (Spain) by installing a magnetic damping-based detector suspension inside a pulse-tube cryostat. We tested the suspension in low-temperature (15 mK) measurements with two scintillating bolometers made of large-volume crystals of 116CdWO4(reference of the set-up) and Li2MoO4 (R&D of the CLYMENE project in view of the CUPID 2β experiment), each coupled to a thin Ge bolometric light detector. Despite the evidence of a residual pulse-tube-induced noise, picked up by cabling, we achieved high performance with all tested devices. In particular, the energy resolution for 2615 keV γ-ray measured with both116CdWO4 and Li2MoO4 bolometers is ∼6 keV FWHM, among the best-reported results for thermal detectors based on such compounds representing a great interest to searches for 2β decay in 116Cd (Q-value is 2813 keV) and 100Mo (3034 keV) respectively. Highly efficient particle identification (α vs. β/γ) is achieved also with the scintillating bolometer made of a low light yield crystal (Li2MoO4), thanks to the low noise (10 eV RMS) exhibited by the light detector exploiting the Neganov-Trofimov-Luke effect for signal amplification. We also found a rather high level of radiopurity in the Li2MoO4 crystal; only traces of 210Po and 226Ra were detected (∼0.1 mBq/kg each), while the228Th activity is expected to be at least an order of magnitude lower, as well as a 40K activity is below 6 mBq/kg.

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