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The synthetic double wavelength technique: a simple robust method for thermodynamic temperature determination
Metrologia ( IF 2.4 ) Pub Date : 2020-03-30 , DOI: 10.1088/1681-7575/ab7173
Stéphan Briaudeau , Frédéric Bourson , Olga Kozlova , Mohamed Sadli , Annick Razet

This paper describes a new relative technique developed at LNE-Cnam, for the determination of the thermodynamic temperature of blackbodies without recourse to a radiometric reference. This technique is referred to as the ‘synthetic double wavelength technique’ (SDWT) as it is considered to be a particular case of the ‘double wavelength technique’ (DWT). It offers a new experimental technique for the determination of the thermodynamic temperature at high temperature and as such a new means for the mise-en-pratique of the new definition of the kelvin achievable by any national metrology institute provided a multi-wavelength radiation thermometer combining large and narrow bandwidths is available. In this work, a first experimental implementation of this technique based on a wavelength-tuneable spectroradiometer providing both narrowband and broadband signals with the particularity of the broadband signal being virtually synthesised from the spectral distribution of the narrowband signals sampled over a wide spectral range. SDWT determination of the thermodynamic temperature of a blackbody at 2760 K was performed with a level of uncertainty that confirms the promising capabilities of this technique.



中文翻译:

合成双波长技术:一种简单稳健的热力学温度测定方法

本文介绍了 LNE-Cnam 开发的一种新的相关技术,用于在不依赖辐射参考的情况下确定黑体的热力学温度。这种技术被称为“合成双波长技术”(SDWT),因为它被认为是“双波长技术”(DWT)的一种特殊情况。它为高温下热力学温度的测定提供了一种新的实验技术,是一种新的实验方法。任何国家计量研究所都可以实现的新开尔文定义中,提供了一种结合了大带宽和窄带宽的多波长辐射温度计。在这项工作中,该技术的第一个实验实现基于波长可调光谱辐射计,提供窄带和宽带信号,宽带信号的特殊性是从在宽光谱范围内采样的窄带信号的光谱分布虚拟合成的。SDWT 对 2760 K 黑体的热力学温度的测定具有一定程度的不确定性,证实了该技术的潜力。

更新日期:2020-03-30
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