Assessing Dispersion Induced Errors in Spectroradiometric Temperature Measurements

Physics

Scientific paper

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3900 Mineral Physics, 3994 Instruments And Techniques, 3999 General Or Miscellaneous

Scientific paper

The laser-heated diamond anvil cell (LHDAC) is a valuable quantitative tool for the earth and planetary sciences because it can reproduce the thermodynamic conditions in planetary interiors, making possible measurements of material properties for those portions of planets that are not directly observable. The utility of the LHDAC is diminished, however, when systematic imaging-system-related errors lead to difficulty in comparing the results of different experiments and different labs. We present calculations detailing systematic errors in spectroradiometric temperature measurements due to the diamond anvil itself. Wavelength-dependent index of refraction and absorption can lead to errors of several hundred K. In addition, we assess methods for interpreting data already in the literature with respect to these sources of error.

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