Design and Development of Vacuum Mercury Fixed PointBlackbody Radiation Source
LI Kai1,2, HAO Xiao-peng2, SONG Jian2, SUN Jian-ping2, HU Chao-yun2, LIU Yang2,3, HU You-hua1,2, YANG Yan-long1,2
1.College of Applied Nuclear Technology and Automation Engineering,Chengdu University of Technology, Chengdu, Sichuan 610059,China
2.National Institute of Metrology,Beijing 100029,China
3.College of Science, Xian Polytechnic University, Xian, Shaanxi 710048, China
Abstract：The structure, working principle, performance test results and uncertainty analysis of the vacuum mercury fixed point blackbody radiation source developed by NIM, China, were introduced. The perfusion metal of the vacuum mercury fixed point blackbody was high purity mercury with a purity of 99.9999%. The opening diameter of the blackbody cavity is 25 mm, the inner diameter of the cavity is 28 mm, the depth is 260mm, and the surface is coated with high emissivity coating from NEXTEL 811-21. The Monte Carlo calculation method was used to calculate the blackbody emissivity at the wavelength of 8~14μm. The emissivity is higher than 0.9999. In the vacuum environment, the main technical indicators such as the temperature curve and repeatability of the temperature of the mercury fixed point blackbody were tested. The results show that the temperature stability of the vacuum mercury fixed point blackbody is better than 2mK, and the repeatability is better than 1mK. The uncertainty source of the vacuum mercury fixed point blackbody is analyzed, the synthetic standard uncertainty is better than 16mK.
李凯, 郝小鹏, 宋健, 孙建平, 胡朝云, 刘洋, 扈又华, 杨延龙. 真空汞固定点黑体辐射源的设计与研制[J]. 计量学报, 2020, 41(4): 413-418.
LI Kai, HAO Xiao-peng, SONG Jian, SUN Jian-ping, HU Chao-yun, LIU Yang, HU You-hua, YANG Yan-long. Design and Development of Vacuum Mercury Fixed PointBlackbody Radiation Source. Acta Metrologica Sinica, 2020, 41(4): 413-418.
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2020, Vol. 41 
