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Open Access Publications from the University of California

Radon mitigation during the installation of the CUORE 0νββ decay detector

  • Author(s): Benato, G;
  • Biare, D;
  • Bucci, C;
  • Paolo, LD;
  • Drobizhev, A;
  • Kadel, RW;
  • Kolomensky, YG;
  • Schreiner, J;
  • Singh, V;
  • Sipla, T;
  • Wallig, J;
  • Zimmermann, S
  • et al.

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CUORE - the Cryogenic Underground Observatory for Rare Events - is an experiment searching for the neutrinoless double-beta (0νββ) decay of 130Te with an array of 988 TeO2 crystals operated as bolometers at ∼10 mK in a large dilution refrigerator. With this detector, we aim for a 130Te 0νββ decay half-life sensitivity of 9×1025 y with 5 y of live time, and a background index of 10-2 counts/keV/kg/y. Making an effort to maintain radiopurity by minimizing the bolometers' exposure to radon gas during their installation in the cryostat, we perform all operations inside a dedicated cleanroom environment with a controlled radon-reduced atmosphere. In this paper, we discuss the design and performance of the CUORE Radon Abatement System and cleanroom, as well as a system to monitor the radon level in real time.

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