Agnew, N; Machin, G; Riis, E; Arnold, A S (2024) Practical Doppler broadening thermometry. AIP Conference Proceedings, 3230 (1). 110002

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Abstract

We report initial research to develop a compact and practical primary thermometer based on Doppler broadening thermometry (DBT). The DBT sensor uses an intrinsic property of thermalized atoms, namely, the Doppler width of a spectral line characteristic of the atoms being probed. The DBT sensor, being founded on a primary thermometry approach, requires no calibration or reference, and so in principle could achieve reliable long-term in-situ thermodynamic temperature measurement. Here we describe our approach and report on initial proof-of-concept investigations with alkali metal vapour cells. Our focus is to develop long-term stable thermometers based on DBT that can be used to reliably measure temperatures for long periods and in environments where sensor retrieval for re-calibration is impractical such as in nuclear waste storage facilities.

Item Type:	Article
Keywords:	Doppler Broadening Thermometry, DBT, primary thermometry
Subjects:	Engineering Measurements > Thermal
Divisions:	Thermal & Radiometric Metrology
Identification number/DOI:	10.1063/5.0234155
Last Modified:	12 May 2025 13:50
URI:	https://eprintspublications.npl.co.uk/id/eprint/10159