Abstract
A non-intrusive ion concentration and temperature measurement technique was developed by spontaneous Raman imaging. Various concentrations of electrolyte solutions were used as samples. The concentration was obtained from a calibration curve depicting the correlation between the Raman intensity and concentration, which was observed by the Raman spectra obtained by employing a 488-nm CW laser and a spectrometer. On the other hand, the Raman scattering from water was focused on for the temperature measurement, and temperature was measured by using the Raman intensity dependencies on water-related Raman band. By applying these calibration curves, a spatial distributions measurement of ion concentration and temperature was realized by the spontaneous Raman imaging.
