Abstract
A high-temperature, high-pressure experimental system is presented that is compatible with a state-of-the-art laser Raman spectrometer. The apparatus and associate electronics and valving, which allow Raman spectra acquisition from ambient conditions to 500 °C and 1-kbar pressure in corrosive aqueous solutions, are described. Diamond windows and a titanium bodied optical design are used to obtain these conditions. Automatically controlled heating jackets have been built that allow ±0.4 °C temperature stability over this range. Raman spectra are presented that demonstrate the capabilities of this experimental apparatus for aqueous studies as a function of temperature and pressures.
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