Calibration of optical particle spectrometers using mounted fibres
<p>Calibrations of optical particle spectrometers (OPSs) are non-trivial and conventionally involve aerosolisation techniques, which are challenging for larger particles. In this paper, we present a new technique for OPS calibration that involves mounting a static fibre within the instrument s...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2025-01-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/18/305/2025/amt-18-305-2025.pdf |
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| author | J. Girdwood J. Girdwood J. Girdwood H. Ballington C. Stopford R. Lewis E. Hesse |
| author_facet | J. Girdwood J. Girdwood J. Girdwood H. Ballington C. Stopford R. Lewis E. Hesse |
| author_sort | J. Girdwood |
| collection | DOAJ |
| description | <p>Calibrations of optical particle spectrometers (OPSs) are non-trivial and conventionally involve aerosolisation techniques, which are challenging for larger particles. In this paper, we present a new technique for OPS calibration that involves mounting a static fibre within the instrument sample area, measuring the scattering cross section (SCS), and then comparing the SCS with a calculated value. In addition, we present a case for the use of generalised Lorenz–Mie theory (GLMT) simulations to account for deviations in both minor- and major-axis beam intensity, which has a significant effect on particles that are large compared with the beam waist, in addition to reducing the need for a “top-hat” spatial intensity profile. The described technique is OPS independent and could be applied to a field calibration tool that could be used to verify the calibration of instruments before they are deployed. In addition to this, the proposed calibration technique would be suited for applications involving the mass production of low-cost OPSs.</p> |
| format | Article |
| id | doaj-art-2761a0f093af45bca2e2d7e041e05112 |
| institution | Kabale University |
| issn | 1867-1381 1867-8548 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj-art-2761a0f093af45bca2e2d7e041e051122025-01-16T13:43:22ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482025-01-011830531710.5194/amt-18-305-2025Calibration of optical particle spectrometers using mounted fibresJ. Girdwood0J. Girdwood1J. Girdwood2H. Ballington3C. Stopford4R. Lewis5E. Hesse6Centre for Atmospheric and Climate Physics, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB, UKnow at: School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UKnow at: National Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UKCentre for Atmospheric and Climate Physics, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB, UKCentre for Atmospheric and Climate Physics, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB, UKCentre for Atmospheric and Climate Physics, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB, UKCentre for Atmospheric and Climate Physics, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB, UK<p>Calibrations of optical particle spectrometers (OPSs) are non-trivial and conventionally involve aerosolisation techniques, which are challenging for larger particles. In this paper, we present a new technique for OPS calibration that involves mounting a static fibre within the instrument sample area, measuring the scattering cross section (SCS), and then comparing the SCS with a calculated value. In addition, we present a case for the use of generalised Lorenz–Mie theory (GLMT) simulations to account for deviations in both minor- and major-axis beam intensity, which has a significant effect on particles that are large compared with the beam waist, in addition to reducing the need for a “top-hat” spatial intensity profile. The described technique is OPS independent and could be applied to a field calibration tool that could be used to verify the calibration of instruments before they are deployed. In addition to this, the proposed calibration technique would be suited for applications involving the mass production of low-cost OPSs.</p>https://amt.copernicus.org/articles/18/305/2025/amt-18-305-2025.pdf |
| spellingShingle | J. Girdwood J. Girdwood J. Girdwood H. Ballington C. Stopford R. Lewis E. Hesse Calibration of optical particle spectrometers using mounted fibres Atmospheric Measurement Techniques |
| title | Calibration of optical particle spectrometers using mounted fibres |
| title_full | Calibration of optical particle spectrometers using mounted fibres |
| title_fullStr | Calibration of optical particle spectrometers using mounted fibres |
| title_full_unstemmed | Calibration of optical particle spectrometers using mounted fibres |
| title_short | Calibration of optical particle spectrometers using mounted fibres |
| title_sort | calibration of optical particle spectrometers using mounted fibres |
| url | https://amt.copernicus.org/articles/18/305/2025/amt-18-305-2025.pdf |
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