Laser-induced fluorescence of phosphors for remote cryogenic thermometry
Laser-induced fluorescence of phosphors for remote cryogenic thermometry
复制标题
用于远程低温测温的磷光体激光诱导荧光
DOI：
--
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
S. Schwenterly
中科院分区：
文献类型：
--
作者：
D. Beshears;G. Capps;M. Cates;C. M. Simmons;S. Schwenterly
通过在具有温度相关发射的荧光粉中诱导荧光并测量发射寿命，可以进行远程低温温度测量。热成像荧光粉技术可用于在强直流电场或磁场等恶劣环境中进行精确的、非接触式的低温温度测量。美国国家航空航天局有兴趣使用这些热成像荧光粉来绘制低温储罐壁上的热点。掺Eu的硫化镧(La2O2S：Eu)和掺锰的氟锗镁(Mg4FGeO6：Mn)适用于低温表面测温。在337 nm紫外光激发下，荧光寿命与温度成对数关系。给出了La2O2S：Eu和Mg4FGeO6：Mn的定标曲线以及在室温和11K下的发射光谱。
Remote cryogenic temperature measurements can be made by inducing fluorescence in phosphors with temperature-dependent emissions and measuring the emission lifetimes. The thermographic phosphor technique can be used for making precision, noncontact, cryogenic-temperature measurements in electrically hostile environments, such as high dc electric or magnetic fields. The National Aeronautics and Space Administration is interested in using these thermographic phosphors for mapping hot spots on cryogenic tank walls. Europium-doped lanthanum oxysulfide (La2O2S:Eu) and magnesium fluorogermanate doped with manganese (Mg4FGeO6:Mn) are suitable for low-temperature surface thermometry. Several emission lines, excited by a 337-nm ultraviolet laser, provide fluorescence lifetimes having logarithmic dependence with temperature from 4 to above 125 K. A calibration curve for both La2O2S:Eu and Mg4FGeO6:Mn is presented, as well as emission spectra taken at room temperature and 11 K.