Scientific Results

An active-shield method for the reduction of surface contamination in CUORE

Year: 2007

Authors: Pedretti M., Alessandria F., Ardito R., Arnaboldi C., Avignone III F.T., Balata M., Bandac I., Barucci M., Beeman J.W., Bellini F., Brofferio C., Bucci C., Capelli S., Carbone L., Cebrian S., Clemenza M., Cosmelli C., Cuneo S., Cremonesi O., Creswick R.J., Dafinei I., Di Domizio S., Diemoz S., Dolinski M.J., Farach H.A., Ferroni F., Fiorini E., Foggetta L., Freedman S.J., Gargiulo C., Giachero A., Guardincerri E., Giuliani A., Gorla P., Gutierrez T.D., Haller E.E., Heeger K.M., Irastorza I.G., Kolomenski Yu.G., Longo E., Maier G., Maruyama R., Martinez C., Morganti S., Nisi S., Nones C., Norman E.B., Nucciotti A., Olcese M., Ottonello P., Pallavicini M., Palmieri E., Pavan M., Pessina G., Pirro S., Pessina G., Previtali E., Risegari L., Rosenfeld C., Salvioni C., Sangiorgio S., Sisti M., Smith A.R., Torres L., Ventura G., Vignati M., Xu N., Zarra C., Zanotti L.

Autors Affiliation: Dipartimento di Fisica e Matematica, Università dell\’ Insubria, Sezione INFN di Milano, Como I-22100, Italy; INFN, Sezione di Milano, Milan I-20133, Italy; Dipartimento di Fisica, Università di Milano-Bicocca e Sezione di Milano, INFN, Milan I-2016, Italy; Dipartimento di Ingegneria Strutturale, Politecnico di Milano, Milano I-20133, Italy; Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, United States; Laboratori Nazionali Del Gran Sasso, I-67010, Assergi (L \’Aquila), Italy; Dipartimento di Fisica, Università di Firenze e Sezione di Firenze, INFN, Firenze I-50125, Italy; Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Dipartimento di Fisica, Università di Roma e Sezione di Roma 1, INFN, Roma I-16146, Italy; Laboratorio de Fisica Nuclear y Alta Energias, Universitad de Zaragoza, 5001 Zaragoza, Spain; Dipartimento di Fisica, Università di Genova e Sezione di Genova, INFN, Genova I-16146, Italy; Sezione di Genova, INFN, Genova I-16146, Italy; Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720, United States; Lawrence Livermore National Laboratory, Livermore, CA 94550, United States; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Department of Physics, University of California, Berkeley, CA 94720, United States

Abstract: The main goal of the CUORE experiment is to search for the neutrinoless double beta decay of 130Te. As it is a rare nuclear decay, the sensitivity of the experiment strongly depends on the background level in the transition energy region. In this paper we describe the R&D work performed to develop an active method for the reduction of radioactive background in CUORE. The idea is to reject events originated by surface contamination in large mass bolometric detectors by using bolometers sensitive to surface events. Results obtained with the first prototypes and tests made with large mass surface sensitive bolometers will be reported.

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More Information: We are pleased to acknowledge that this work has been partially supported by the ILIAS integrating activity (Contract No. RII3-CT-2004-506222) as part of the European Union FP6 programme in Astroparticle Physics, and by the PRIN- 2004 project \”Large Mass, Low Noise Cryogenic Detectors to Search for Weak and Gravitational Processes\” (Italian Ministery of Research and University).
KeyWords: Bolometer; Cryogenic detector; Double beta decay; Neutrino
DOI: 10.1063/1.2722069

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