Measurement of the dependence of ultra diluted gas transmittance on the size of the detector

Abstract We show that measured optical transmittance of an ultra thin gas depends on the detector size. To this end we conducted an experiment that compares transmittances measured in parallel with a pair of detectors with different diameters ranging from 2 to 200 $$\upmu$$ μ m. A Tunable Diode Las...

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Autor principal:	Jakub M. Ratajczak
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c398ba5097e440249c763d07b46bcdd2
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spelling	oai:doaj.org-article:c398ba5097e440249c763d07b46bcdd22021-12-02T16:31:14ZMeasurement of the dependence of ultra diluted gas transmittance on the size of the detector10.1038/s41598-021-85568-w2045-2322https://doaj.org/article/c398ba5097e440249c763d07b46bcdd22021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85568-whttps://doaj.org/toc/2045-2322Abstract We show that measured optical transmittance of an ultra thin gas depends on the detector size. To this end we conducted an experiment that compares transmittances measured in parallel with a pair of detectors with different diameters ranging from 2 to 200 $$\upmu$$ μ m. A Tunable Diode Laser Absorption Spectroscopy type system was used. Transmittance of $$\sim$$ ∼ 10 $$^{-2}$$ - 2 mbar water vapor on NIR absorption line $$\lambda =1368.60$$ λ = 1368.60 nm was measured using a 61.6 m long multi-pass cell placed inside the $$\sim$$ ∼ 300 l vacuum chamber. The result of the experiment shows higher transmittances when the measurement is performed using smaller detectors. The difference reaches as much as $$1.23 \pm 0.1$$ 1.23 ± 0.1 %, which is greater than 0 with $$>5 \sigma$$ > 5 σ statistical significance. Qualitatively it is in agreement with the recently developed model of thin gas optical transmittance taking into account the quantum mechanical effects of spreading of the wave functions of individual gas particles.Jakub M. RatajczakNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jakub M. Ratajczak Measurement of the dependence of ultra diluted gas transmittance on the size of the detector
description	Abstract We show that measured optical transmittance of an ultra thin gas depends on the detector size. To this end we conducted an experiment that compares transmittances measured in parallel with a pair of detectors with different diameters ranging from 2 to 200 $$\upmu$$ μ m. A Tunable Diode Laser Absorption Spectroscopy type system was used. Transmittance of $$\sim$$ ∼ 10 $$^{-2}$$ - 2 mbar water vapor on NIR absorption line $$\lambda =1368.60$$ λ = 1368.60 nm was measured using a 61.6 m long multi-pass cell placed inside the $$\sim$$ ∼ 300 l vacuum chamber. The result of the experiment shows higher transmittances when the measurement is performed using smaller detectors. The difference reaches as much as $$1.23 \pm 0.1$$ 1.23 ± 0.1 %, which is greater than 0 with $$>5 \sigma$$ > 5 σ statistical significance. Qualitatively it is in agreement with the recently developed model of thin gas optical transmittance taking into account the quantum mechanical effects of spreading of the wave functions of individual gas particles.
format	article
author	Jakub M. Ratajczak
author_facet	Jakub M. Ratajczak
author_sort	Jakub M. Ratajczak
title	Measurement of the dependence of ultra diluted gas transmittance on the size of the detector
title_short	Measurement of the dependence of ultra diluted gas transmittance on the size of the detector
title_full	Measurement of the dependence of ultra diluted gas transmittance on the size of the detector
title_fullStr	Measurement of the dependence of ultra diluted gas transmittance on the size of the detector
title_full_unstemmed	Measurement of the dependence of ultra diluted gas transmittance on the size of the detector
title_sort	measurement of the dependence of ultra diluted gas transmittance on the size of the detector
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c398ba5097e440249c763d07b46bcdd2
work_keys_str_mv	AT jakubmratajczak measurementofthedependenceofultradilutedgastransmittanceonthesizeofthedetector
_version_	1718383898277183488

Measurement of the dependence of ultra diluted gas transmittance on the size of the detector

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