L. Canonica

Search for double-β decay of 130Te to the first 0+ excited state of 130Xe with the CUORICINO experiment bolometer array

E. Andreotti, 2, a C. Arnaboldi, F. T. Avignone III, M. Balata, I. Bandac, M. Barucci, 7 J. W. Beeman, F. Bellini, 10 C. Brofferio, 3 A. Bryant, 12 C. Bucci, L. Canonica, 14 S. Capelli, 3 L. Carbone, M. Carrettoni, 3 M. Clemenza, 3 O. Cremonesi, R. J. Creswick, S. Di Domizio, 14 M. J. Dolinski, 15 L. Ejzak, R. Faccini, 10 H. A. Farach, E. Ferri, 3 E. Fiorini, 3, b L. Foggetta, 2, c A. Giachero, L. Gironi, 3 A. Giuliani, 2, d P. Gorla, e E. Guardincerri, 11, 14 T. D. Gutierrez, E. E. Haller, 18 K. Kazkaz, L. Kogler, 12 S. Kraft, 3 C. Maiano, 3 C. Martinez, f M. Martinez, 19, g R. H. Maruyama, S. Newman, 5 S. Nisi, C. Nones, 2, h E. B. Norman, 20 A. Nucciotti, 3 F. Orio, 10 M. Pallavicini, 14 V. Palmieri, L. Pattavina, 3 M. Pavan, 3 M. Pedretti, G. Pessina, S. Pirro, E. Previtali, L. Risegari, 7 C. Rosenfeld, C. Rusconi, 2 C. Salvioni, 2 S. Sangiorgio, i D. Schaeffer, 3 N. D. Scielzo, M. Sisti, 3 A. R. Smith, C. Tomei, G. Ventura, 7 and M. Vignati 10 Dipartimento di Fisica e Matematica, Università dell’Insubria, Como I-22100 Italy INFN Sezione di Milano Bicocca, Milano I-20126 Italy Dipartimento di Fisica, Università di Milano-Bicocca, Milano I-20126 Italy Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 USA INFN Laboratori Nazionali del Gran Sasso, Assergi (L’Aquila) I-67010 Italy Dipartimento di Fisica, Università di Firenze, Firenze I-50125 Italy INFN Sezione di Firenze, Firenze I-50125 Italy Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Dipartimento di Fisica, Sapienza Università di Roma, Roma I-00185 Italy INFN Sezione di Roma, Roma I-00185 Italy Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Department of Physics, University of California, Berkeley, CA 94720 USA Dipartimento di Fisica, Università di Genova, Genova I-16146 Italy INFN Sezione di Genova, Genova I-16146 Italy Lawrence Livermore National Laboratory, Livermore, CA 94550 USA Department of Physics, University of Wisconsin, Madison, WI 53706 USA Physics Department, California Polytechnic State University, San Luis Obispo, CA 93407 USA Department of Materials Science and Engineering, University of California, Berkeley, CA 94720 USA Laboratorio de Fisica Nuclear y Astroparticulas, Universidad de Zaragoza, Zaragoza 50009 Spain Department of Nuclear Engineering, University of California, Berkeley, CA 94720 USA INFN Laboratori Nazionali di Legnaro, Legnaro (Padova) I-35020 Italy EH&S Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA (Dated: February 1, 2013)

The CUORE cryostat: a 10 mK infrastructure for large bolometric arrays

The CUORE experiment is the worlds largest bolometric experiment. The detector consists of an array of 988 TeO 2 crystals, for a total mass of 742 kg. CUORE is presently in data taking at the Laboratori Nazionali del Gran Sasso, Italy, searching for the neutrinoless double beta decay of 130Te. A large custom cryogen-free cryostat allows reaching and maintaining a base temperature of about 10 mK, required for the optimal operation of the detector. This apparatus has been designed in order to guarantee a low noise environment, with minimal contribution to the radioactive background for the experiment. In this paper, we present an overview of the CUORE cryostat, together with a description of all its sub-systems, focusing on the solutions identified to satisfy the stringent requirements. We briefly illustrate the various phases of the cryostat commissioning and highlight the relevant steps and milestones achieved each time. Finally, we describe the successful cooldown of CUORE.

0νββ decay: the CUPID-0 experiment

CUPID-0 is an array of 24 Zn82Se scintillating bolometers used to search for the 0νββ decay of 82Se. It is the first large mass 0νββ experiment exploiting a double read-out technique: the phonon signal to accurately measure particle energies and the light signal to reject the α-induced background. Its success might open the road to a next generation project of ton mass scale, CUPID. The array is in operation at Laboratori Nazionali del Gran Sasso since the beginning of 2017, in this paper we present the preliminary results obtained with an exposure of 10.45 kg y.

The CUORE Cryostat

The Cryogenic Underground Observatory for Rare Events (CUORE) is a bolometric experiment for neutrinoless double-beta decay in

CUPID-0: A Cryogenic Calorimeter with Particle Identification for Double Beta Decay Search

^{130}\hbox {Te}

The CUORE cryostat: commissioning and performance

130Te search, currently taking data at the underground facility of Laboratori Nazionali del Gran Sasso (LNGS). The CUORE cryostat successfully cooled down a mass of about 1 ton at

Search for β+/EC double beta decay of 120Te

\sim 7\,\hbox {mK}