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Proceedings Paper

Modeling of the behavior of water and soot contaminated oils in the terahertz range
Author(s): Stefan Gorenflo; Ulrike Tauer; Iliyana Hinkov; Armin Lambrecht; Hanspeter Helm
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Paper Abstract

Terahertz Time-Domain Spectroscopy (THz-TDS) is used to investigate water and soot contaminations in oils, exhibiting different dilution modes. For synthetic polyglycol oils, the water is dissolved due to the polar behavior of the oil, whereas in non polar mineral oils the water-oil compound forms an emulsion. This behavior is modeled with an effective medium approximation (EMA) formalism. Small soot agglomerates are remaining in suspension when mineral oils are polluted with soot particles. In this case, the absorption spectrum is dominated by scattering effects. Due to the small particle size of the soot agglomerates compared to the THz wavelength, coherent scattering is the dominant process.

Paper Details

Date Published: 19 April 2006
PDF: 9 pages
Proc. SPIE 6194, Millimeter-Wave and Terahertz Photonics, 619407 (19 April 2006); doi: 10.1117/12.661491
Show Author Affiliations
Stefan Gorenflo, Fraunhofer Institute for Physical Measurement Techniques (Germany)
Ulrike Tauer, Fraunhofer Institute for Physical Measurement Techniques (Germany)
Iliyana Hinkov, Fraunhofer Institute for Physical Measurement Techniques (Germany)
Armin Lambrecht, Fraunhofer Institute for Physical Measurement Techniques (Germany)
Hanspeter Helm, Albert-Ludwigs Univ. Freiburg (Germany)

Published in SPIE Proceedings Vol. 6194:
Millimeter-Wave and Terahertz Photonics
Dieter Jäger; Andreas Stöhr, Editor(s)

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