Upgrade of poloidal field coils current measurement system on Experimental Advanced Superconducting Tokamak
Upgrade of poloidal field coils current measurement system on Experimental Advanced Superconducting Tokamak
复制标题
DOI：
10.1016/j.fusengdes.2019.111264
复制
发表时间：
2019-11
影响因子：
1.7
通讯作者：
M. Xue;D.L. Chen;B. Shen;Yu Wang;T. Shi;H.H. Wang;Y.W. Sun;J. Qian;H. Xiao;B. Xiao
中科院分区：
文献类型：
--
作者：
M. Xue;D.L. Chen;B. Shen;Yu Wang;T. Shi;H.H. Wang;Y.W. Sun;J. Qian;H. Xiao;B. Xiao
高精度测量极向场电流是托卡马克装置运行的基本要求。由12个光纤电流传感器（FOCS）组成的光纤电流测量系统于2018年安装在实验先进超导托卡马克（EAST）PF母线上。安装前，FOCS传感器头在-5 °C至55 °C的温度范围内进行校准，以满足PF母线电流测量精度要求（0.4%）。为了减少传感器头的磁串扰，已经开发了一个模型，并验证了FOCS传感器头。在用于检测EAST PF母线电流的实验中，FOCS表现出优异的性能。与Rogowski线圈相比，FOCS的输出没有时间相关漂移和磁串扰，FOCS的噪声也比Rogowski线圈小。
Measuring poloidal field (PF) current with a high accuracy is a basic requirement for the operation of a tokamak. A fiber optic current measurement system consisting of 12 fiber optic current sensor (FOCS) was installed on the Experimental Advanced Superconducting Tokamak (EAST) PF busbars in 2018. Before installation, the FOCS sensor heads were calibrated for a temperature range between -5 °C and 55 °C to meet the PF busbars current measurement accuracy requirement (0.4%). To reduce the sensor head magnetic crosstalk, a model has been developed and validated for FOCS sensor heads. When used to sense EAST PF busbar currents during experiments, the FOCS showed excellent performance. Compared with the Rogowski coil, there was no time-dependent drift or magnetic crosstalk in the FOCS output, and the noise of the FOCS was smaller than the Rogowski coil.