一种温度监测仪在EAST超导磁体氦温度测量中的应用

摘要

在EAST托卡马克核聚变实验装置中,超导磁体系统的热负荷计算、超导性能和及其运行稳定性等都与磁体运行温度有很大关系,因而要求超导磁体系统的氦冷却管路的温度测量有较高测量精度和稳定性.从氦温度测量方法、专用温度监测仪的配置、用户自标定温度传感器的温度特性曲线的生成出发,介绍专用温度监测仪在EAST超导磁体系统氦温度测量中的具体应用.同时介绍了仪器监控的硬件架构和基于LabVIEW的仪器监控软件设计.经过2轮实验运行,表明该应用提高了氦温度测量的精度、稳定性和工作效率.%In the EAST (Abbr.of Experimental Advanced Superconducting Tokamak) device,operational temperature of the SC (Abbr.of superconducting) magnet system is closely related to those issues like heating load calculation and SC performance and operational stability.Temperature signals of He (Abbr.of Helium) cooling pipe are required to achieve accurate measurements in the SC magnet system.The paper discussed the specific application of a kind of temperature monitor in He temperature measurements for EAST SC magnet.Measuring methods of He temperature,configuration of the temperature monitor and generation of temperature response curve for Cernox sensors calibrated by user were introduced.Hardware architecture and software design with LabVIEW of the temperature monitor were also mentioned.In the last two experimental campaigns,it shows accuracy and stability of He temperature measurement for EAST SC magnet are improved with application of the kind of temperature monitor.