A CUPID Li$_{2}$$^{100}$MoO$_4$ scintillating bolometer tested in the CROSS underground facility
Creators: name: The CUPID Interest Group
name: Armatol, A.
name: Armengaud, E.
name: Armstrong, W.
name: Augier, C.
name: Avignone, F. T.
name: Azzolini, O.
name: Bandac, I. C.
name: Barabash, A. S.
name: Bari, G.
name: Barresi, A.
name: Baudin, D.
name: Bellini, F.
name: Benato, G.
name: Beretta, M.
name: Bergé, L.
name: Bourgeois, Ch.
name: Biassoni, M.
name: Billard, J.
name: Boldrini, V.
name: Branca, A.
name: Brofferio, C.
name: Bucci, C.
name: Calvo-Mozota, J. M.
name: Camilleri, J.
name: Candela, A.
name: Capelli, S.
name: Cappelli, L.
name: Cardani, L.
name: Carniti, P.
name: Casali, N.
name: Cazes, A.
name: Celi, E.
name: Chang, C.
name: Chapellier, M.
name: Charrier, A.
name: Chiesa, D.
name: Clemenza, M.
name: Colantoni, I.
name: Collamati, F.
name: Copello, S.
name: Cova, F.
name: Cremonesi, O.
name: Creswick, R. J.
name: Cruciani, A.
name: D'Addabbo, A.
name: D'Imperio, G.
name: Dafinei, I.
name: Danevich, F. A.
name: de Combarieu, M.
name: De Deo, M.
name: De Jesus, M.
name: de Marcillac, P.
name: Dell'Oro, S.
name: Di Domizio, S.
name: Dompe, V.
name: Drobizhev, A.
name: Dumoulin, L.
name: Fantini, G.
name: Fasoli, M.
name: Faverzani, M.
name: Ferri, E.
name: Ferri, F.
name: Ferroni, F.
name: Figueroa-Feliciano, E.
name: Formaggio, J.
name: Franceschi, A.
name: Fu, C.
name: Fu, S.
name: Fujikawa, B. K.
name: Gascon, J.
name: Giachero, A.
name: Gironi, L.
name: Giuliani, A.
name: Gorla, P.
name: Gotti, C.
name: Gras, P.
name: Gros, M.
name: Guerard, E.
name: Gutierrez, T. D.
name: Han, K.
name: Hansen, E. V.
name: Heeger, K. M.
name: Helis, D. L.
name: Huang, H. Z.
name: Huang, R. G.
name: Ianni, A.
name: Imbert, L.
name: Johnston, J.
name: Juillard, A.
name: Karapetrov, G.
name: Keppel, G.
name: Khalife, H.
name: Kobychev, V. V.
name: Kolomensky, Yu. G.
name: Konovalov, S. I.
name: Liu, Y.
name: Loaiza, P.
name: Ma, L.
name: Madhukuttan, M.
name: Mancarella, F.
name: Mariam, R.
name: Marini, L.
name: Marnieros, S.
name: Martinez, M.
name: Maruyama, R. H.
name: Mauri, B.
name: Mayer, D.
name: Mei, Y.
name: Milana, S.
name: Misiak, D.
name: Napolitano, T.
name: Nastasi, M.
name: Navick, X. -F.
name: Nikkel, J.
name: Nipoti, R.
name: Nisi, S.
name: Nones, C.
name: Norman, E. B.
name: Novosad, V.
name: Nutini, I.
name: O'Donnell, T.
name: Olivier, G.
name: Olivieri, E.
name: Oriol, C.
name: Ouellet, J. L.
name: Pagan, S.
name: Pagliarone, C.
name: Pagnanini, L.
name: Pari, P.
name: Pattavina, L.
name: Paul, B.
name: Pavan, M.
name: Peng, H.
name: Pessina, G.
name: Pettinacci, V.
name: Pira, C.
name: Pirro, S.
name: Poda, D. V.
name: Polakovic, T.
name: Polischuk, O. G.
name: Pozzi, S.
name: Previtali, E.
name: Puiu, A.
name: Ressa, A.
name: Reynet, D.
name: Rizzoli, R.
name: Rosenfeld, C.
name: Sanglard, V.
name: Scarpaci, J. A.
name: Schmidt, B.
name: Sharma, V.
name: Shlegel, V. N.
name: Singh, V.
name: Sisti, M.
name: Speller, D.
name: Surukuchi, P. T.
name: Taffarello, L.
name: Tellier, O.
name: Tomei, C.
name: Tretyak, V. I.
name: Tsymbaliuk, A.
name: Vedda, A.
name: Velazquez, M.
name: Vetter, K. J.
name: Wagaarachchi, S. L.
name: Wang, G.
name: Wang, L.
name: Welliver, B.
name: Wilson, J.
name: Wilson, K.
name: Winslow, L. A.
name: Xue, M.
name: Yan, L.
name: Yang, J.
name: Yefremenko, V.
name: Yumatov, V. I.
name: Zarytskyy, M. M.
name: Zhang, J.
name: Zolotarova, A. S.
name: Zucchelli, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A scintillating bolometer based on a large cubic Li$_{2}$$^{100}$MoO$_4$ crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation $0\nu2β$ experiment CUPID. The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The Li$_{2}$$^{100}$MoO$_4$ bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV $γ$ line. The detection of scintillation light for each event triggered by the Li$_{2}$$^{100}$MoO$_4$ bolometer allowed for a full separation ($\sim$8$σ$) between $γ$($β$) and $α$ events above 2 MeV. The Li$_{2}$$^{100}$MoO$_4$ crystal also shows a high internal radiopurity with $^{228}$Th and $^{226}$Ra activities of less than 3 and 8 $μ$Bq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li$_{2}$$^{100}$MoO$_4$ scintillating bolometers for high-sensitivity searches for the $^{100}$Mo $0\nu2β$ decay in CROSS and CUPID projects.
description: 19 pages, 7 figures, 1 table