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30 May 2022 Long-range, range-resolved detection of H2 using single-photon ‘quantum’ Raman: a condition monitoring tool for long-term storage of nuclear materials
David J. M. Stothard, Matthew S. Warden, Roman Spesyvtsev, Ellis Kelly, John Leck, Alexander Allen, Jon Squire, Stephen Hepworth, Simon Malone, Jo Tunney, Frank Allison, David Armstrong, David Li, Loyd McKnight
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Proceedings Volume PC12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII; PC1211608 (2022) https://doi.org/10.1117/12.2621423
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States
Abstract
The stand-off, range-resolved detection of hydrogen production rates is a valuable mechanism for the long-term condition monitoring of packages containing intermediate-level nuclear materials. To exploit this effect we have developed a long-range optical sensor system which uses Raman detection of hydrogen. Our need for operation over extended ranges (up to 100m) results in very low Raman signals. We therefore use time-correlated (with respect to the outgoing excitation laser pulse) and spectrally-resolved single-photon detection to ascertain molecular species, position and concentration as revealed by photon energy, arrival time and number, respectively.
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David J. M. Stothard, Matthew S. Warden, Roman Spesyvtsev, Ellis Kelly, John Leck, Alexander Allen, Jon Squire, Stephen Hepworth, Simon Malone, Jo Tunney, Frank Allison, David Armstrong, David Li, and Loyd McKnight "Long-range, range-resolved detection of H2 using single-photon ‘quantum’ Raman: a condition monitoring tool for long-term storage of nuclear materials", Proc. SPIE PC12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII, PC1211608 (30 May 2022); https://doi.org/10.1117/12.2621423
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KEYWORDS
Hydrogen
Raman spectroscopy
Single photon detectors
Absorption
Hydrogen production
Inspection
Laser applications
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