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arXiv · 1711.07936

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

G. Benato·D. Biare·C. Bucci·L. Di Paolo·A. Drobizhev·R. W. Kadel·Yu. G. Kolomensky·J. Schreiner·V. Singh·T. Sipla·J. Wallig·S. Zimmermann
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Abstract

CUORE - the Cryogenic Underground Observatory for Rare Events - is an experiment searching for the neutrinoless double-beta ($0νββ$) decay of $^{130}$Te with an array of 988 TeO$_2$ crystals operated as bolometers at $\sim$10 mK in a large dilution refrigerator. With this detector, we aim for a $^{130}$Te $0νββ$ decay half-life sensitivity of $9\times10^{25}$ y with 5 y of live time, and a background index of $\lesssim 10^{-2}$ 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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G. Benato, D. Biare, C. Bucci, L. Di Paolo, A. Drobizhev, R. W. Kadel, Yu. G. Kolomensky, J. Schreiner, V. Singh, T. Sipla, J. Wallig, S. Zimmermann. 2018-01-18. Radon mitigation during the installation of the CUORE $0νββ$ decay detector. https://doi.org/10.1088/1748-0221%2F13%2F01%2Fp01010

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