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arXiv · 2506.06022

Millikelvin-precision temperature sensing for advanced cryogenic detectors

Maria Antonova·Jordi Capó·Anselmo Cervera·Pablo Fernández·Miguel Á. García-Peris·Xavier Pons
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Abstract

Precise temperature monitoring -- to the level of a few milli-Kelvin -- is essential for the operation of large-scale cryostats requiring a recirculation system. In particular, the performance of Liquid Argon Time Projection Chambers -- such as those planned for the DUNE experiment -- strongly relies on proper argon purification and mixing, which can be characterized by a sufficiently dense grid of high-precision temperature probes. In this article, we present a novel technique for the cross-calibration of Resistance Temperature Detectors in cryogenic liquids, developed as part of the temperature monitoring system for a DUNE prototype. This calibration has enabled the validation and optimization of the system's components, achieving an unprecedented precision of 2.5 mK.

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Maria Antonova, Jordi Capó, Anselmo Cervera, Pablo Fernández, Miguel Á. García-Peris, Xavier Pons. 2025-06-06. Millikelvin-precision temperature sensing for advanced cryogenic detectors. https://arxiv.org/abs/2506.06022

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