Dr. Moira Hilton Profile

Dr. Moira Hilton

Senior Research Fellow at Univ of Reading

SPIE Involvement:

Author

Proceedings Article | 22 April 2006 Paper

Low-cost gas correlation detection of methane

O. Chapman, M. Hilton

Proceedings Volume 6189, 61890R (2006) https://doi.org/10.1117/12.673852

KEYWORDS: Sensors, Methane, Indium gallium arsenide, Modulation, Optical filters, Absorption, Image filtering, Calcium, Detector arrays, Aluminum

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Proceedings Article | 12 April 2004 Paper

The NPL wide-area MIR calibration source

Martin Dury, Evangelos Theo Theocharous, Neil Harrison, Moira Hilton, Nigel Fox

Proceedings Volume 5405, (2004) https://doi.org/10.1117/12.563841

KEYWORDS: Black bodies, Nanolithography, Coating, Reflectivity, Copper, Calibration, Temperature metrology, Monte Carlo methods, Reflectors, Mid-IR

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Proceedings Article | 22 September 2003 Paper

Laser-induced incandescence characterization of gas turbine exhausts

John Black, Moira Hilton, Mark Johnson, David Waterman

Proceedings Volume 5149, (2003) https://doi.org/10.1117/12.519773

KEYWORDS: Atmospheric particles, Particles, Aerosols, Pulsed laser operation, Argon, Carbon, Gases, Black bodies, Q switched lasers, Visible radiation

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Proceedings Article | 18 April 2003 Paper

Detection of ethene and other hydrocarbons in gas turbine engine exhaust using non-intrusive FTIR spectroscopy

Giovanni Arrigone, Michael Welch, Moira Hilton, Michael Miller, Christopher Wilson

Proceedings Volume 4882, (2003) https://doi.org/10.1117/12.463157

KEYWORDS: FT-IR spectroscopy, Spectroscopy, Carbon monoxide, Calibration, Absorption, Sensors, Carbon, Prototyping, Infrared radiation, Infrared spectroscopy

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As part of the EU funded project AEROJET2, a number of gas turbine engine tests were performed in different facilities around Europe. At Farnborough, UK a Spey engine was used to test a suite of prototype optically based instrumentation designed to measure exhaust gas emissions without using extractive probe systems. In addition to the AEROJET 2 prototype instrumentation, a Bruker Equinox 55 Fourier transform infrared (FTIR) spectrometer was used to obtain infrared spectra of the exhaust plume both in emission and absorption mode. The Bruker FTIR spectrometer was fitted with a periscope system so that different lines of sight could be monitored in the plume in a vertical plane 25 cm downstream from the nozzle exit and 20 cm upstream of the center line of sight of the AEROJET 2 prototype instrumentation. DERA (now QinetiQ) provided exhaust gas analysis data for different engine running conditions using samples extracted from the plume with an intrusive probe. The probe sampled along a horizontal plane across the centerline of the engine 45 cm downstream of the nozzle exit. The Bruker spectrometer used both InSb (indium antimonide) and MCT (mercury-cadmium-telluride) detectors to maximize the sensitivity across the IR range 600-4000 cm^-1. Typically, CO₂ and H₂O IR signatures dominate the observed spectra of the plume. However, the engine tests showed that at low power engine conditions spectral features associated with CO around 2147 cm^-1 and with hydrocarbons could be observed at around 3000 cm^-1. In particular the presence of ethene (C₂H₂) was detected from observation of its characteristic in and out of plane vibration mode at 949 cm^-1. At high engine powers the presence of NO was detected at 1900.3 cm^-1. Species concentrations were calculated using a slab model for each line of sight compared against reference spectra. The engine plume was assumed to be symmetric about the centerline. On this basis, data from the extractive sampling gas analysis that had been obtained by traversing the probe across a horizontal plane through the centerline could be compared with non-intrusive measurements made by scanning vertically. Adjustments have been made to account for the 20 cm downstream offset in measurement planes of the probe and the spectrometer behind the nozzle exit.

Proceedings Article | 31 January 2001 Paper

Optical spectroscopic measurement of unburnt hydrocarbons in emissions from aeroengine combustion systems

Giovanni Arrigone, Moira Hilton

Proceedings Volume 4168, (2001) https://doi.org/10.1117/12.413866

KEYWORDS: Spectrometers, Lithium, Combustion, Sensors, FT-IR spectroscopy, Spectroscopy, Mirrors, Gases, Optical testing, Optical spectroscopy

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Proceedings Article | 16 September 1999 Paper

Evaluation of FTIR emission spectrometry for the determination of turbine exhaust composition in test beds

Klaus Schaefer, Joerg Heland, Dave Lister, Erwin Lindermeir, Moira Hilton, Gary Bishop, Peter Wiesen, Marc Bernard

Proceedings Volume 3821, (1999) https://doi.org/10.1117/12.364205

KEYWORDS: FT-IR spectroscopy, Spectroscopy, Calibration, Carbon monoxide, Spectrometers, Radio optics, Mirrors, Temperature metrology, Data modeling, Absorption

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Proceedings Article | 16 September 1999 Paper

Determination of exhaust composition in turbine test beds by FTIR emission spectrometry

Klaus Schaefer, Joerg Heland, Erwin Lindermeir, Moira Hilton, Gary Bishop, Johanna Vally, Peter Wiesen, Dave Lister, Marc Bernard

Proceedings Volume 3821, (1999) https://doi.org/10.1117/12.364180

KEYWORDS: FT-IR spectroscopy, Spectroscopy, Carbon monoxide, Absorption, Temperature metrology, Mirrors, Calibration, Infrared radiation, NOx, Carbon dioxide

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Proceedings Article | 16 September 1999 Paper

Non intrusive spectroscopic investigations of soot and unburnt hydrocarbons in combustion gases

Moira Hilton, Giovanni Arrigone, Michael Miller

Proceedings Volume 3821, (1999) https://doi.org/10.1117/12.364181

KEYWORDS: Particles, Spectroscopy, Absorption, FT-IR spectroscopy, Argon, Combustion, Atmospheric particles, Statistical analysis, Gases, Sensors

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Proceedings Article | 15 December 1998 Paper

Detection of soot particles in gas turbine engine combustion gases using nonintrusive FTIR spectroscopy

Moira Hilton, John Black

Proceedings Volume 3493, (1998) https://doi.org/10.1117/12.332660

KEYWORDS: FT-IR spectroscopy, Spectroscopy, Gases, Particles, Combustion, Infrared spectroscopy, Fourier transforms, Gas lasers, Optical filters

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Proceedings Article | 15 December 1998 Paper

Measurement of Fourier transform infrared spectrometer instrument lineshape

Nicholas Davies, William Bell, A. Vance, Moira Hilton

Proceedings Volume 3493, (1998) https://doi.org/10.1117/12.332638

KEYWORDS: Spectroscopy, Nanolithography, FT-IR spectroscopy, Gas lasers, Carbon monoxide, Mirrors, Infrared spectroscopy, Laser systems engineering, Fourier transforms, Apodization

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Proceedings Article | 23 May 1997 Paper

AEROJET: nonintrusive measurements of aircraft engine exhaust emissions

Klaus Schaefer, Joerg Heland, Roger Burrows, John Black, Marc Bernard, Gary Bishop, Volker Tank, Erwin Lindermeir, Dave Lister, Robert Falk, Peter Wiesen, Moira Hilton

Proceedings Volume 3108, (1997) https://doi.org/10.1117/12.274773

KEYWORDS: Spectroscopy, Temperature metrology, FT-IR spectroscopy, Calibration, Gases, Absorption, Environmental sensing, Mirrors, Carbon monoxide, Pollution control

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Proceedings Article | 22 May 1997 Paper

Superresolution and other mathematical techniques for quantitative analysis of infrared absorption and emission spectra of gases

Nicholas Davies, Alan Lettington, Moira Hilton

Proceedings Volume 3106, (1997) https://doi.org/10.1117/12.274724

KEYWORDS: Absorption, Spectroscopy, Super resolution, Carbon monoxide, Image processing, Linear filtering, FT-IR spectroscopy, Image filtering, Gases, Spectral resolution

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Proceedings Article | 29 June 1994 Paper

Remote gas detection and quantitative analysis from infrared emission spectra obtained by Fourier transform infrared spectroscopy

Moira Hilton, Alan Lettington, Ian Mills

Proceedings Volume 2222, (1994) https://doi.org/10.1117/12.177976

KEYWORDS: Spectroscopy, Carbon dioxide, Absorption, Molecules, FT-IR spectroscopy, Temperature metrology, Calibration, Gases, Infrared spectroscopy, Methane

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Proceedings Article | 31 January 1994 Paper

Passive remote detection of atmospheric pollutants using Fourier transform infrared (FTIR) spectroscopy

Moira Hilton, Alan Lettington, Ian Mills

Proceedings Volume 2089, (1994) https://doi.org/10.1117/12.166586

KEYWORDS: Spectroscopy, FT-IR spectroscopy, Temperature metrology, Carbon monoxide, Gases, Pollution detection, Atmospheric sensing, Spectroscopic atmospheric monitoring techniques, Signal to noise ratio, Black bodies

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Showing 5 of 14 publications

SPIE Conference Volume | 16 September 1999

Environmental Sensing and Applications

Conference Committee Involvement (1)

Environmental Sensing and Applications

14 June 1999 | Munich, Germany

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