Abstract: In fusion experiments, integrator is a fundamental method to recover differential signals, and the 
development of low drift integrator system is an important step in tokamak experiment. A low drift integrator 
system for magnetic measurement on HL-2M tokamak is introduced. By means of analog and digital 
compensation, the drift is reduced and the measurement accuracy between signals is improved. The performance 
test shows that the output drift of the integrator is less than 2mV/15s, and the accuracy of the integral time 
constant is better than 0.3%. The integrator is applied to HL-2M tokamak experiments and meets the requirements 
of magnetic measurement system. 

Key words: HL-2M tokamak, Integrator, Magnetic measurement 

摘要： 在核聚变实验中, 积分器是还原微分信号的基本手段，低漂移积分器系统的研制是托卡马克实验中
的重要环节。介绍了用于 HL-2M 装置磁测量的低漂移积分器系统。通过模拟与数字补偿相结合的方法减小漂移，
提高了信号间的测量精度。性能测试显示，积分器输出漂移小于 2mV/15s，积分时间常数精度优于 0.3%。该积分
器应用于 HL-2M 装置实验，满足磁测量系统的测量需要。

关键词: HL-2M 装置, 积分器, 磁测量