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Measurement of Single Moving Particle Temperatures with an FT-IR Spectrometer

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Abstract:

A conventional scanning FT-IR spectrometer is used to measure the blackbody radiation through a rapidly moving pinhole in an experiment simulating a flying hot particle. The effects and errors from source movements are analyzed and verified through experiments. The importance of the scanning velocity, phase-correction method, and temperature variations during scanning is investigated. It is shown that a calibration of the system at one temperature is sufficient for accurate spectral radiance and temperature measurements throughout a broad temperature range. The temperature errors are reduced by a factor of 2-10 compared with results from a typical two-color pyrometer. A novel method is presented for measuring emission spectra from single moving particles passing the field of view of the spectrometer in a random manner.

Keywords: FT-IR; Infrared emission spectroscopy; Particle temperature; Phase-correction

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702963905150

Affiliations: 1: Optics and Fluid Dynamics Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark 2: Optics and Fluid Dynamics Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark; present address: Reatech, P.O. Box 30, DK-4000 Roskilde, Denmark

Publication date: September 1, 1996

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