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|Author(s):||Howard W. Yoon; Charles E. Gibson; V B. Khromchenko; George P. Eppeldauer; Robert R. Bousquet; Steven W. Brown; Keith R. Lykke;|
|Title:||Thermodynamic Radiation Thermometry for the Next SI|
|Abstract:||We describe the construction, the calibration and the use of the NIST Thermodynamic Radiation Thermometer (TRT) to measure the temperature of the gold-freezing temperature blackbody and a variable-temperature blackbody from 800 ?C to 2700 ?C. These temperature determinations are detector-based and derived from the electrical substitution radiometer and length units. The TRT is constructed using a cooled, near-infrared enhanced silicon detector with a room-temperature-stabilized 5-position filter wheel. The characteristics of the TRT, such as the size-of-source effect and preamplifier linearity, are determined. The measured temperatures are compared with those obtained using the NIST Absolute Pyrometer 1 (AP1) and the current NIST standard radiation thermometer, the Photo-electric Pyrometer (PEP). After the performance assessments, the TRT will become the standard radiation thermometer for disseminating radiance temperature scales in the United States.|
|Citation:||International Journal of Thermophysics|
|Keywords:||gold freezing temperature,kelvin,linearity,radiometric temperatures,thermodynamic temperatures|