用于实验先进超导托卡马克磁测量的交变积分器的研制。

Development of an alternating integrator for magnetic measurements for experimental advanced superconducting tokamak.

作者信息

Liu D M, Wan B N, Zhao W Z, Shen B, He Y G, Chen B, Huang J, Liu H Q

机构信息

School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China.

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China.

出版信息

Rev Sci Instrum. 2014 Nov;85(11):11E826. doi: 10.1063/1.4891706.

DOI:10.1063/1.4891706

PMID:25430391

Abstract

A high-performance integrator is one of the key electronic devices for reliably controlling plasma in the experimental advanced superconducting tokamak for long pulse operation. We once designed an integrator system of real-time drift compensation, which has a low integration drift. However, it is not feasible for really continuous operations due to capacitive leakage error and nonlinearity error. To solve the above-mentioned problems, this paper presents a new alternating integrator. In the new integrator, the integrator system of real-time drift compensation is adopted as one integral cell while two such integral cells work alternately. To achieve the alternate function, a Field Programmable Gate Array built in the digitizer is utilized. The performance test shows that the developed integrator with the integration time constant of 20 ms has a low integration drift (<15 mV) for 1000 s.

摘要

高性能积分器是在实验先进超导托卡马克装置中实现长脉冲运行时可靠控制等离子体的关键电子设备之一。我们曾设计了一种具有低积分漂移的实时漂移补偿积分器系统。然而，由于电容泄漏误差和非线性误差，它对于真正的连续运行是不可行的。为了解决上述问题，本文提出了一种新型交替积分器。在新型积分器中，采用实时漂移补偿积分器系统作为一个积分单元，两个这样的积分单元交替工作。为实现交替功能，利用了数字化仪中内置的现场可编程门阵列。性能测试表明，所研制的积分器在积分时间常数为20 ms时，1000 s内具有低积分漂移（<15 mV）。