학술논문
A CUPID Li$_{2}$$^{100}$MoO$_4$ scintillating bolometer tested in the CROSS underground facility
Document Type
Working Paper
Author
The CUPID Interest Group; Armatol, A.; Armengaud, E.; Armstrong, W.; Augier, C.; Avignone III, F. T.; Azzolini, O.; Bandac, I. C.; Barabash, A. S.; Bari, G.; Barresi, A.; Baudin, D.; Bellini, F.; Benato, G.; Beretta, M.; Bergé, L.; Bourgeois, Ch.; Biassoni, M.; Billard, J.; Boldrini, V.; Branca, A.; Brofferio, C.; Bucci, C.; Calvo-Mozota, J. M.; Camilleri, J.; Candela, A.; Capelli, S.; Cappelli, L.; Cardani, L.; Carniti, P.; Casali, N.; Cazes, A.; Celi, E.; Chang, C.; Chapellier, M.; Charrier, A.; Chiesa, D.; Clemenza, M.; Colantoni, I.; Collamati, F.; Copello, S.; Cova, F.; Cremonesi, O.; Creswick, R. J.; Cruciani, A.; D'Addabbo, A.; D'Imperio, G.; Dafinei, I.; Danevich, F. A.; de Combarieu, M.; De Deo, M.; De Jesus, M.; de Marcillac, P.; Dell'Oro, S.; Di Domizio, S.; Dompe, V.; Drobizhev, A.; Dumoulin, L.; Fantini, G.; Fasoli, M.; Faverzani, M.; Ferri, E.; Ferri, F.; Ferroni, F.; Figueroa-Feliciano, E.; Formaggio, J.; Franceschi, A.; Fu, C.; Fu, S.; Fujikawa, B. K.; Gascon, J.; Giachero, A.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Gras, P.; Gros, M.; Guerard, E.; Gutierrez, T. D.; Han, K.; Hansen, E. V.; Heeger, K. M.; Helis, D. L.; Huang, H. Z.; Huang, R. G.; Ianni, A.; Imbert, L.; Johnston, J.; Juillard, A.; Karapetrov, G.; Keppel, G.; Khalife, H.; Kobychev, V. V.; Kolomensky, Yu. G.; Konovalov, S. I.; Liu, Y.; Loaiza, P.; Ma, L.; Madhukuttan, M.; Mancarella, F.; Mariam, R.; Marini, L.; Marnieros, S.; Martinez, M.; Maruyama, R. H.; Mauri, B.; Mayer, D.; Mei, Y.; Milana, S.; Misiak, D.; Napolitano, T.; Nastasi, M.; Navick, X. -F.; Nikkel, J.; Nipoti, R.; Nisi, S.; Nones, C.; Norman, E. B.; Novosad, V.; Nutini, I.; O'Donnell, T.; Olivier, G.; Olivieri, E.; Oriol, C.; Ouellet, J. L.; Pagan, S.; Pagliarone, C.; Pagnanini, L.; Pari, P.; Pattavina, L.; Paul, B.; Pavan, M.; Peng, H.; Pessina, G.; Pettinacci, V.; Pira, C.; Pirro, S.; Poda, D. V.; Polakovic, T.; Polischuk, O. G.; Pozzi, S.; Previtali, E.; Puiu, A.; Ressa, A.; Reynet, D.; Rizzoli, R.; Rosenfeld, C.; Sanglard, V.; Scarpaci, J. A.; Schmidt, B.; Sharma, V.; Shlegel, V. N.; Singh, V.; Sisti, M.; Speller, D.; Surukuchi, P. T.; Taffarello, L.; Tellier, O.; Tomei, C.; Tretyak, V. I.; Tsymbaliuk, A.; Vedda, A.; Velazquez, M.; Vetter, K. J.; Wagaarachchi, S. L.; Wang, G.; Wang, L.; Welliver, B.; Wilson, J.; Wilson, K.; Winslow, L. A.; Xue, M.; Yan, L.; Yang, J.; Yefremenko, V.; Yumatov, V. I.; Zarytskyy, M. M.; Zhang, J.; Zolotarova, A. S.; Zucchelli, S.
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Abstract
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 $0\nu2\beta$ 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}$$^{100}$MoO$_4$ bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV $\gamma$ line. The detection of scintillation light for each event triggered by the Li$_{2}$$^{100}$MoO$_4$ bolometer allowed for a full separation ($\sim$8$\sigma$) between $\gamma$($\beta$) and $\alpha$ events above 2 MeV. The Li$_{2}$$^{100}$MoO$_4$ crystal also shows a high internal radiopurity with $^{228}$Th and $^{226}$Ra activities of less than 3 and 8 $\mu$Bq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li$_{2}$$^{100}$MoO$_4$ scintillating bolometers for high-sensitivity searches for the $^{100}$Mo $0\nu2\beta$ decay in CROSS and CUPID projects.
Comment: 19 pages, 7 figures, 1 table
Comment: 19 pages, 7 figures, 1 table