Innovating Bolometers' Mounting: A Gravity-Based Approach
Abstract
Cryogenic calorimeters, also known as bolometers, are among the leading technologies for searching for rare events. The CUPID experiment is exploiting this technology to deploy a tonne-scale detector to search for neutrinoless double-beta decay of Mo. The CUPID collaboration proposed an innovative approach to assembling bolometers in a stacked configuration, held in position solely by gravity. This gravity-based assembly method is unprecedented in the field of bolometers and offers several advantages, including relaxed mechanical tolerances and simplified construction. To assess and optimize its performance, we constructed a medium-scale prototype hosting 28 LiMoO crystals and 30 Ge light detectors, both operated as cryogenic calorimeters at the Laboratori Nazionali del Gran Sasso (Italy). Despite an unexpected excess of noise in the light detectors, the results of this test proved (i) a thermal stability better than 0.5 mK at 10 mK, (ii) a good energy resolution of LiMoO bolometers, (6.6 2.2) keV FWHM at 2615 keV, and (iii) a LiMoO light yield measured by the closest light detector of 0.36 keV/MeV, sufficient to guarantee the particle identification requested by CUPID.
Cite
@article{arxiv.2503.04481,
title = {Innovating Bolometers' Mounting: A Gravity-Based Approach},
author = {The CUPID Collaboration and K. Alfonso and A. Armatol and C. Augier and F. T. Avignone and O. Azzolini and A. S. Barabash and G. Bari and A. Barresi and D. Baudin and F. Bellini and G. Benato and L. Benussi and V. Berest and M. Beretta and M. Bettelli and M. Biassoni and J. Billard and F. Boffelli and V. Boldrini and E. D. Brandani and C. Brofferio and C. Bucci and M. Buchynska and J. Camilleri and A. Campani and J. Cao and C. Capelli and S. Capelli and V. Caracciolo and L. Cardani and P. Carniti and N. Casali and E. Celi and C. Chang and M. Chapellier and H. Chen and D. Chiesa and D. Cintas and M. Clemenza and I. Colantoni and S. Copello and O. Cremonesi and R. J. Creswick and A. D'Addabbo and I. Dafinei and F. A. Danevich and F. De Dominicis and M. De Jesus and P. de Marcillac and S. Dell'Oro and S. Di Domizio and S. Di Lorenzo and V. Dompè and A. Drobizhev and L. Dumoulin and G. Fantini and M. El Idrissi and M. Faverzani and E. Ferri and F. Ferri and F. Ferroni and E. Figueroa-Feliciano and J. Formaggio and A. Franceschi and S. Fu and B. K. Fujikawa and J. Gascon and S. Ghislandi and A. Giachero and M. Girola and L. Gironi and A. Giuliani and P. Gorla and C. Gotti and C. Grant and P. Gras and P. V. Guillaumon and T. D. Gutierrez and K. Han and E. V. Hansen and K. M. Heeger and D. L. Helis and H. Z. Huang and M. T. Hurst and L. Imbert and A. Juillard and G. Karapetrov and G. Keppel and H. Khalife and V. V. Kobychev and Yu. G. Kolomensky and R. Kowalski and H. Lattaud and M. Lefevre and M. Lisovenko and R. Liu and Y. Liu and P. Loaiza and L. Ma and F. Mancarella and N. Manenti and A. Mariani and L. Marini and S. Marnieros and M. Martinez and R. H. Maruyama and Ph. Mas and D. Mayer and G. Mazzitelli and E. Mazzola and Y. Mei and M. N. Moore and S. Morganti and T. Napolitano and M. Nastasi and J. Nikkel and C. Nones and E. B. Norman and V. Novosad and I. Nutini and T. O'Donnell and E. Olivieri and M. Olmi and B. T. Oregui and S. Pagan and M. Pageot and L. Pagnanini and D. Pasciuto and L. Pattavina and M. Pavan and Ò. Penek and H. Peng and G. Pessina and V. Pettinacci and C. Pira and S. Pirro and O. Pochon and D. V. Poda and T. Polakovic and O. G. Polischuk and E. G. Pottebaum and S. Pozzi and E. Previtali and A. Puiu and S. Puranam and S. Quitadamo and A. Rappoldi and G. L. Raselli and A. Ressa and R. Rizzoli and C. Rosenfeld and P. Rosier and M. Rossella and J. A. Scarpaci and B. Schmidt and R. Serino and A. Shaikina and K. Shang and V. Sharma and V. N. Shlegel and V. Singh and M. Sisti and P. Slocum and D. Speller and P. T. Surukuchi and L. Taffarello and S. Tomassini and C. Tomei and A. Torres and J. A. Torres and D. Tozzi and V. I. Tretyak and D. Trotta and M. Velazquez and K. J. Vetter and S. L. Wagaarachchi and G. Wang and L. Wang and R. Wang and B. Welliver and J. Wilson and K. Wilson and L. A. Winslow and F. Xie and M. Xue and J. Yang and V. Yefremenko and V. I. Umatov and M. M. Zarytskyy and T. Zhu and A. Zolotarova and S. Zucchelli},
journal= {arXiv preprint arXiv:2503.04481},
year = {2025}
}