Bak J G, Lee S G, Son D, Ga E M
Research and Development Division, National Fusion Research Center, Daejeon, Korea.
Rev Sci Instrum. 2007 Apr;78(4):043504. doi: 10.1063/1.2721405.
An analog integrator, which automatically compensates an integrating drift, has been developed for the magnetic diagnostics in the Korea superconducting tokamak advanced research (KSTAR). The compensation of the drift is done by the analog to digital converter-register-digital to analog converter in the integrator. The integrator will be used in the equilibrium magnetic field measurements by using inductive magnetic sensors during a plasma discharge in the KSTAR machine. Two differential amplifiers are added to the signal path between each magnetic sensor and the integrator in order to improve the performance of the integrator because a long signal cable of 100 m will be used for the measurement in the KSTAR machine. In this work, the characteristics of the integrator with two differential amplifiers are experimentally investigated.
为韩国超导托卡马克先进研究装置（KSTAR）的磁诊断开发了一种能自动补偿积分漂移的模拟积分器。漂移补偿由积分器中的模数转换器-寄存器-数模转换器完成。该积分器将用于在KSTAR装置等离子体放电期间，通过感应磁传感器进行平衡磁场测量。在每个磁传感器与积分器之间的信号路径中添加了两个差分放大器，以提高积分器的性能，因为在KSTAR装置中测量时将使用100米长的信号电缆。在这项工作中，对带有两个差分放大器的积分器的特性进行了实验研究。
