A gravity-based mounting approach for large-scale cryogenic calorimeter arrays

A gravity-based mounting approach for large-scale cryogenic calorimeter arrays Full article

Journal

European Physical Journal C
ISSN: 1434-6044 , E-ISSN: 1434-6052

Output data

Year: 2025, Volume: 85, Number: 9, Article number : 935, Pages count : 13 DOI: 10.1140/epjc/s10052-025-14613-z

Authors

Alfonso K. ^1,2 , Armatol A. ³ , Augier C. ⁴ , Barabash A.S. ⁵ , Drobizhev A. ³ , Mei Y. ³ , Torres A. ¹ , Shlegel V.N. ⁶ , Umatov V.I. ⁵ , Zolotarova A. ⁷ , at al (192 authors in total) . ⁸

Affiliations

1	Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
2	University of California, Los Angeles, CA, USA
3	Lawrence Berkeley National Laboratory, Berkeley, CA, USA
4	Univ Lyon, Université Lyon 1, CNRS/IN2P3, IP2I-Lyon, Villeurbanne, France
5	National Research Centre Kurchatov Institute, Kurchatov Complex of Theoretical and Experimental Physics, Moscow, Russia
6	Nikolaev Institute of Inorganic Chemistry, Novosibirsk, Russia
7	IRFU, CEA, Université Paris-Saclay, Saclay, France
8	CUPID Collaboration

Cryogenic calorimeters are among the leadingtechnologies for searching for rare events. The CUPID exper-iment is exploiting this technology to deploy a tonne-scaledetector to search for neutrinoless double-beta decay of100Mo. The CUPID collaboration proposed an innovativeapproach to assembling cryogenic calorimeters in a stackedconfiguration, held in position solely by gravity. This gravity-based assembly method is unprecedented in the field of cryo-genic calorimeters and offers several advantages, includingrelaxed mechanical tolerances and simplified construction.To assess and optimize its performance, we constructed amedium-scale prototype hosting 28 Li2MoO4 crystals and 30Ge light detectors, both operated as cryogenic calorimetersat the Laboratori Nazionali del Gran Sasso (Italy). Despite anunexpected excess of noise in the light detectors, the results ofthis test proved (i) a thermal stability better than ±0.5 mK at10 mK, (ii) a good energy resolution of Li2MoO4 cryogeniccalorimeters, (6.6 ± 2.2) keV FWHM at 2615 keV, and (iii)a Li2MoO4 light yield measured by the closest light detectorof 0.36 keV/MeV, sufficient to guarantee the particle identification requested by CUPID

Alfonso K. , Armatol A. , Augier C. , Barabash A.S. , Drobizhev A. , Mei Y. , Torres A. , Shlegel V.N. , Umatov V.I. , Zolotarova A. , at al (192 authors in total)
A gravity-based mounting approach for large-scale cryogenic calorimeter arrays
European Physical Journal C. 2025. V.85. N9. 935 :1-13. DOI: 10.1140/epjc/s10052-025-14613-z WOS Scopus OpenAlex

Submitted:	Mar 7, 2025
Accepted:	Aug 6, 2025
Published print:	Sep 2, 2025
Published online:	Oct 2, 2025

Web of science:	WOS:001574131000001
Scopus:	2-s2.0-105017115781
OpenAlex:	W4413931680

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