JSME International Journal Series B Fluids and Thermal Engineering
Online ISSN : 1347-5371
Print ISSN : 1340-8054
ISSN-L : 1340-8054
Improvement in Temperature Measurement Accuracy of Q-Branch CARS Thermometry : Effects of Spectral Resolution of Detection System
Kazuhiro AkihamaTakeshi Asai
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1993 Volume 36 Issue 2 Pages 364-370

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Abstract

The temperature measurement accuracy of N2 Q-branch CARS (Coherent Anti-Stokes Raman Spectroscopy) below 1000K has been improved by improving the spectral resolution of the detection system. The total spectral resolution was improved from 1. 3cm-1 to 0. 6cm-1 by dispersion magnification (×3. 6), which was effected by adding a magnifier between a monochromator and an intensified photodiode array detector. The accuracy of temperature measurement in the temperature range of 300-800K for pressures of 0. 1-3. 0MPa has been greatly improved from ±100K, in the case without the magnifier, to ±40K. The method reported in this paper has a potential advantage for practical use because of its convenience.

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© The Japan Society of Mechanical Engineers
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