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Prospects for CUORE and Latest Results from CUORICINO

Prospects for CUORE and Latest Results from CUORICINO. Eric B. Norman Lawrence Livermore National Laboratory. Energy absorber TeO 2 crystal C  2 nJ/K. Thermometer NTD Ge-thermistor R  100 M W dR/dT  100 k W/mK. Heat sink T  10 mK. Thermal coupling. CUORE Detector concepts.

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Prospects for CUORE and Latest Results from CUORICINO

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  1. Prospects for CUORE and Latest Results from CUORICINO Eric B. Norman Lawrence Livermore National Laboratory

  2. Energy absorber TeO2 crystal C  2 nJ/K Thermometer NTD Ge-thermistor R  100 MW dR/dT  100 kW/mK Heat sink T  10 mK Thermal coupling CUORE Detector concepts • Temperature signal: DT = E/C 0.1 mK for E = 1 MeV • Voltage signal: DV = I  dR/dT DTDV = 1 mV for E = 1 MeV • Signal recovery time: t = C/G  0.5 s Energy resolution (FWHM):  5 keV at 2500 keV

  3. CUORE Array of988crystals: 19 towers of 52 crystals/tower. M=0.78 tonof TeO2 70 cm Search for 0n DBD of 130Te Qbb = 2529 keV Natural isotopic abundance [130Te] = 34.08% Therefore, isotopic enrichment is unnecessay

  4. MC simulation of CUORE background Details of CUORE module used in MC simulations

  5. What can CUORE do ?

  6. CUORE and CUORICINO location CUORICINO and CUOREexperiments are located in the Underground National Laboratory of Gran Sasso L'Aquila – ITALY the mountain provides a 3500 m.w.e. shield against cosmic rays Two dilution refrigerators: Hall A (CUORICINO) Hall C (final R&D tests for CUORE)

  7. CUORICINO Active mass during first runs: 42 x 0.790 kg = 33.2 kg 17 x 0.330 kg = 5.6 kg ~ 11 kg 130Te A prototype for CUORE

  8. CUORICINO Performance 2615 keV 208Tl 5x5x5 cm3crystals 3x3x6 cm3crystals • average 5x5x5 cm3 crystals ~ 7 keV • average 3x3x6 cm3 crystals ~ 9 keV • Energy calibration spectrum obtained with 232Th source (summed over all crystals) Energy resolutions of individual crystals  The best energy resolution @ 2615 keV is 3.9 keV

  9. Results of CUORICINO Runs 1&2 C. Arnaboldi et al. PRL 95, 142501 (2005) exposure = 10.85 kg y (TeO2) FWHM at 2615 keV = 9.2 +0.5 keV bkgd in the 0nbb region = 0.18+0.01 counts /(keV kg y) t0n1/2 > 1.8 x 1024 y at 90% C.L. mn < 0.2 – 1.1 eV

  10. DBD and Neutrino Masses Present Cuoricino region Possible evidence (best value 0.39 eV) H.V. Klapdor-Kleingrothaus et al., Nucl.Instrum.and Meth. ,522, 367 (2004). Using Klapdor’s matrix element for 130Te the Cuoricino limit is 0.53 eV “quasi” degeneracy m1 m2  m3 Inverse hierarchy m212= m2atm Direct hierarchy m212= m2sol Cosmological disfavoured region (WMAP) Feruglio F. , Strumia A. , Vissani F. hep-ph/0201291

  11. CUORE Collaboration E. B. Norman, M. Dolinski, Lawrence Livermore National Laboratory J. W. Beeman, T. D. Gutierrez, K. M. Heeger, A. R. Smith, N. Xu Lawrence Berkeley National Laboratory S. J. Freedman, E. E. Haller, R. Maruyama University of California at Berkeley D. R. Artusa, F. T. Avignone III, I. Bandac, R. J. Creswick, H. A. Farach, C. Rosenfeld University of South Carolina C. Arnaboldi, C. Brofferio, S. Capelli, F. Capozzi, L. Carbone, O. Cremonesi, E. Fiorini, A. Nucciotti, M. Pavan, G. Pessina, S. Pirro, E. Previtali, M. Sisti, L. Torres, L. Zanotti Universita’ di Milano-Bicocca R. Ardito, G. Maier Politecnico de Milano A. Giuliani, S. M. Pedretti, S. Sangiorgio Universita degli Studi dell’Insubria M. Barucci, E. Olivieri,, E. Pasca, L. Risegari, G. Ventura Universita’ di Firenze F. Bellini, C. Cosmelli, I. Dafinei, M. Diemoz, F. Ferroni, C. Gargiulo, E. Longo, S. Morganti Universita di Roma E. Guardincerri, P. Ottonell, M. Pallavicini Universita di Genova M. Balata, C. Bucci, S. Nisi Laboratori Nazionali del Gran Sasso V. Palmieri, S. Toffanin Laboratori Nazionali di Legnaro A. de Waard, G. Frossati Leiden University S. Cebrian, P. Gorla, I. G. Irastorza University of Zaragoza

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