Practical primary thermometry via alkali-metal-vapour Doppler broadening
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
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| _version_ | 1866909988121739264 |
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| author | Agnew, Nicola Vohníková, Veronika Riis, Erling Machin, Graham Arnold, Aidan S. |
| author_facet | Agnew, Nicola Vohníková, Veronika Riis, Erling Machin, Graham Arnold, Aidan S. |
| contents | Doppler-broadening thermometry (DBT) can be used as a calibration-free primary reference suitable for practical applications, e.g. reliably measuring temperatures over long periods of time in environments where sensor retrieval is impractical. We report on our proof-of-concept investigations into DBT with alkali metal vapour cells, with a particular focus on both absorption and frequency accuracy during scans. We reach sub-kelvin temperature accuracy, and experimental absorption fit residuals below $0.05\,\%$, in a simple setup. The outlook for portable, practical devices is bright, with clear prospects for future improvement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_24854 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Practical primary thermometry via alkali-metal-vapour Doppler broadening Agnew, Nicola Vohníková, Veronika Riis, Erling Machin, Graham Arnold, Aidan S. Atomic Physics Quantum Physics Doppler-broadening thermometry (DBT) can be used as a calibration-free primary reference suitable for practical applications, e.g. reliably measuring temperatures over long periods of time in environments where sensor retrieval is impractical. We report on our proof-of-concept investigations into DBT with alkali metal vapour cells, with a particular focus on both absorption and frequency accuracy during scans. We reach sub-kelvin temperature accuracy, and experimental absorption fit residuals below $0.05\,\%$, in a simple setup. The outlook for portable, practical devices is bright, with clear prospects for future improvement. |
| title | Practical primary thermometry via alkali-metal-vapour Doppler broadening |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2505.24854 |