Rugged fiber optic probes and sampling systems for remote chemical analysis via the Raman technique

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Recent advances in fiber optics, diode lasers, CCD detectors, dielectric and holographic optical filters, grating spectrometers, and chemometric data analysis have greatly simplified Raman spectroscopy. In order to make a rugged fiber optic Raman probe for solids/slurries like these at Savannah River, we have designed a probe that eliminates as many optical elements and surfaces as possible. The diffuse reflectance probe tip is modified for Raman scattering by installing thin dielectric in-line filters. Effects of each filter are shown for the NaNO{sub 3} Raman spectrum. By using a diode laser excitation at 780 nm, fluorescence is greatly reduced, and excellent ... continued below

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18 p.

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Nave, S.E. July 1, 1996.

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Description

Recent advances in fiber optics, diode lasers, CCD detectors, dielectric and holographic optical filters, grating spectrometers, and chemometric data analysis have greatly simplified Raman spectroscopy. In order to make a rugged fiber optic Raman probe for solids/slurries like these at Savannah River, we have designed a probe that eliminates as many optical elements and surfaces as possible. The diffuse reflectance probe tip is modified for Raman scattering by installing thin dielectric in-line filters. Effects of each filter are shown for the NaNO{sub 3} Raman spectrum. By using a diode laser excitation at 780 nm, fluorescence is greatly reduced, and excellent spectra may be obtained from organic solids. At SRS, fiber optic Raman probes are being developed for in situ chemical mapping of radioactive waste storage tanks. Radiation darkening of silica fiber optics is negligible beyond 700 nm. Corrosion resistance is being evaluated. Analysis of process gas (off-gas from SRS processes) is investigated in some detail: hydrogen in nitrogen with NO{sub 2} interference. Other applications and the advantages of the method are pointed out briefly.

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18 p.

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OSTI as DE96060069

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  • Industrial Computing Society technical conference in conjunction with the international conference and exhibit of the Instrument Society of America, Chicago, IL (United States), 6-11 Oct 1996

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  • Other: DE96060069
  • Report No.: WSRC-MS--96-0295
  • Report No.: CONF-961034--2
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 378999
  • Archival Resource Key: ark:/67531/metadc684825

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 9, 2016, 8:58 p.m.

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Nave, S.E. Rugged fiber optic probes and sampling systems for remote chemical analysis via the Raman technique, article, July 1, 1996; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc684825/: accessed May 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.