QプランチCARS温度計測の高精度化 : 検出系スペクトル分解能の効果

抄録

The temperature measurement accuracy of N₂ Q-branch CARS thermometry 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 the dispersion magnification (X3.6), which was done by adding a magnifier between a monochromator and an optical multichannel detector. An accuracy of temperature measurement in the temperature range of 300-800 K 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.