低温环境下超导体微位移测量的研究  

EXPERIMENTS ON MEASURING SUPERCONDUCTOR’S TINY DISPLACEMENT UNDER CRYOGENIC ENVIRONMENT

作　　者：齐峰[1] 雷沅忠[1] 王秋良[1] 余运佳[1] 

机构地区：[1]中国科学院电工研究所,北京100080

出　　处：《低温物理学报》2006年第2期182-184,共3页Low Temperature Physical Letters

摘　　要：在超导精密仪器的研制工作中有时需要测量杜瓦容器内超导体的微小位置变化.由于超导体需运行在极低温环境,运用常规方法难以对超导体的微小位移进行测量.作者选用光纤位移传感器进行非接触测量,研究了光纤位移传感器在室温和液氮温度下的静态传输特性.本项研究为超导体位移、振动的测量提供了一种新的方法.Tiny displacement of the superconductor in Dewar has to be measured when it works as the core part of the precise apparatus. But conventional methods are not suitable for the tiny displacement detection under cryogenic environment. So fiber optic displacement sensor （FODS） which can detect objects contactlessly is presented. The static transmission properties of FODS were measured at room temperature and liquid nitrogen temperature. The test results showed a new way for measuring the displacement and vibration for superconductors.

关 键 词：超导 低温 微位移 光纤 非接触测量 

分 类 号：O514.2[理学—低温物理]