Radon mitigation during the installation of the CUORE $0\nu \beta \beta$ decay detector

Abstract

CUORE - the Cryogenic Underground Observatory for Rare Events - is an experiment searching for the neutrinoless double-beta ($0\nu \beta \beta$) 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 $0\nu \beta \beta$ decay half-life sensitivity of $9\times 10^{25}$ 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.

arXiv comment10 pages, 6 figures, 1 table

References in corpus (9)

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Cited by in corpus (10)

• First Results from CUORE: A Search for Lepton Number Violation via $0\nu \beta \beta$ Decay of ${}^{130}$Te
• Toward the discovery of matter creation with neutrinoless double-beta decay
• Improved Limit on Neutrinoless Double-Beta Decay in ${}^{130}$Te with CUORE
• The CUORE cryostat: an infrastructure for rare event searches at millikelvin temperatures
• Study of radon reduction in gases for rare event search experiments
• The saga of neutrinoless double beta decay search with TeO2 thermal detectors
• CUORE Opens the Door to Tonne-scale Cryogenics Experiments
• Exploration of Methods to Remove Implanted ${}^{210}$Pb and ${}^{210}$Po Contamination from Silicon Surfaces
• Search for Double-Beta Decay of ${}^{130}\mathrm{Te}$ to the $0^{+}$ States of ${}^{130}\mathrm{Xe}$ with CUORE
• Exploring the keV-scale physics potential of CUORE