Atomic Doppler broadening thermometry(DBT)is potentially an accurate and practical approach for thermodynamic temperature measurement.However,previous reported atomic DBT had a long acquisition time and had only been ...Atomic Doppler broadening thermometry(DBT)is potentially an accurate and practical approach for thermodynamic temperature measurement.However,previous reported atomic DBT had a long acquisition time and had only been proved at the triple point of water,0℃,for the purpose of determination of the Boltzmann constant.This research implemented the cesium atomic DBT for fast room temperature measurement.The Cs^133 D1(6S^1/2→6p^1/2 transition)line was measured by direct laser absorption spectroscopy,and the quantity of thermal-induced linewidth broadening was precisely retrieved by the Voigt profile fitting algorithm.The preliminary results showed the proposed approach had a 4 min single-scan acquisition time and 0.2%reproducibility.It is expected that the atomic DBT could be used as an accurate,chip-scale,and calibration-free temperature sensor and standard.展开更多
基金supported by the National Key R&D Program of China(No.2017YFF0206102)
文摘Atomic Doppler broadening thermometry(DBT)is potentially an accurate and practical approach for thermodynamic temperature measurement.However,previous reported atomic DBT had a long acquisition time and had only been proved at the triple point of water,0℃,for the purpose of determination of the Boltzmann constant.This research implemented the cesium atomic DBT for fast room temperature measurement.The Cs^133 D1(6S^1/2→6p^1/2 transition)line was measured by direct laser absorption spectroscopy,and the quantity of thermal-induced linewidth broadening was precisely retrieved by the Voigt profile fitting algorithm.The preliminary results showed the proposed approach had a 4 min single-scan acquisition time and 0.2%reproducibility.It is expected that the atomic DBT could be used as an accurate,chip-scale,and calibration-free temperature sensor and standard.
