Abstract: An array of twelve 0.28 kg lithium molybdate (LMO) low-temperature bolometers equipped with 16 bolometric Ge light detectors, aiming at optimization of detector structure for CROSS and CUPID double-beta decay experiments, was constructed and tested in a low-background pulse-tube-based cryostat at the Canfranc underground laboratory in Spain. Performance of the scintillating bolometers was studied depending on the size of phonon NTD-Ge sensors glued to both LMO and Ge absorbers, shape of the Ge light detectors (circular vs. square, from two suppliers), in different light collection conditions (with and without reflector, with aluminum coated LMO crystal surface). The scintillating bolometer array was operated over 8 months in the low-background conditions that allowed to probe a very low, μBq/kg, level of the LMO crystals radioactive contamination by 228Th and 226Ra.

Cite: Alfonso K. , Armatol A. , Augier C. , Avignone III F.T. , Azzolini O. , Balata M. , Bandac I.C. , Barabash A.S. , Bari G. , Shlegel V.N. , Zucchelli S.
Twelve-crystal prototype of Li2MoO4 scintillating bolometers for CUPID and CROSS experiments
Journal of Instrumentation. 2023. V.18. N6. P06018 :1-24. DOI: 10.1088/1748-0221/18/06/P06018 WOS Scopus РИНЦ OpenAlex

Dates:

Submitted:	Apr 11, 2023
Accepted:	May 14, 2023
Published print:	Jun 20, 2023
Published online:	Jun 20, 2023

Identifiers:

Web of science:	WOS:001087739700002
Scopus:	2-s2.0-85159681539
Elibrary:	61907503
OpenAlex:	W4381436345

Citing:

DB	Citing
OpenAlex	5
Scopus	4

Altmetrics: