The detector calibration system for the CUORE cryogenic bolometer array

Abstract

The Cryogenic Underground Observatory for Rare Events (CUORE) is a ton-scale cryogenic experiment designed to search for neutrinoless double-beta decay of ${}^{130}$Te and other rare events. The CUORE detector consists of 988 TeO${}_2$ bolometers operated underground at 10 mK in a dilution refrigerator at the Laboratori Nazionali del Gran Sasso. Candidate events are identified through a precise measurement of their energy. The absolute energy response of the detectors is established by the regular calibration of each individual bolometer using gamma sources. The close-packed configuration of the CUORE bolometer array combined with the extensive shielding surrounding the detectors requires the placement of calibration sources within the array itself. The CUORE Detector Calibration System is designed to insert radioactive sources into and remove them from the cryostat while respecting the stringent heat load, radiopurity, and operational requirements of the experiment. This paper describes the design, commissioning, and performance of this novel source calibration deployment system for ultra-low-temperature environments.

16 pages, 19 figures

References in corpus (10)

• CUORE: A Cryogenic Underground Observatory for Rare Events
• Search for Neutrinoless Double-Beta Decay of ${}^{130}$Te with CUORE-0
• Searching for neutrinoless double-beta decay of ${}^{130}$Te with CUORE
• Masses of 130Te, 130Xe and double-beta-decay Q-value of 130Te
• Production of high purity TeO2 single crystals for the study of neutrinoless double beta decay
• Double-beta decay Q values of 130Te, 128Te, and 120Te
• Analysis Techniques for the Evaluation of the Neutrinoless Double-Beta Decay Lifetime in ${}^{130}$Te with CUORE-0
• Validation of techniques to mitigate copper surface contamination in CUORE
• Initial performance of the CUORE-0 experiment
• Model of the response function of large mass bolometric detectors

Cited by in corpus (10)

• First Results from CUORE: A Search for Lepton Number Violation via $0\nu \beta \beta$ Decay of ${}^{130}$Te
• Improved Limit on Neutrinoless Double-Beta Decay in ${}^{130}$Te with CUORE
• The projected background for the CUORE experiment
• Calibration Strategy of the JUNO Experiment
• The CUORE cryostat: an infrastructure for rare event searches at millikelvin temperatures
• The saga of neutrinoless double beta decay search with TeO2 thermal detectors
• Design of Guide Tube Calibration System for JUNO Experiment
• The CUORE cryostat
• The CUORE and CUORE-0 experiments at LNGS
• Cryogenic sensor enabling broad-band and traceable power measurements