摘要
The unit of thermodynamic temperature,the kelvin,is one of the seven base units of International System of Units.High accuracy measurements of thermodynamic temperature in the lowtemperature range,namely below the neon triple point at24.5561 K,are of strategic significance for the development of
The unit of theFmodynamic temperature, the kelvin, is one of the seven base units of International System of Units. High accuracy measurements of thermodynamic temperature in the low- temperature range, namely below tile neon triple point at 24.5561 K, are of strategic significance for the development of both cutting-edge scientific researches and large scientific facilities, such as the Spallation Neutron Source （CSNS）, the Beijing Elec- tron-Positron Collider Ⅱ, Shanghai Synchrotron Radiation Facility and so on. To meet high accuracy cryogenic temperature measure- ment, the low-temperature primary thermometry calibration facilities based on thermodynamic temperature standards are essential. However, China has not yet set up any primary ther- mometry below 24.5561 K.
基金
supported by the National Key Research and Development Program of China(2016YFE0204200)
the National Natural Science Foundation of China(51627809)
the International Partnership Program of the Chinese Academy of Sciences(1A1111KYSB20160017)
the European Metrology Research Programme(EMRP)(InK2)
