快速磁通变化超导线圈失超保护的改进方法

大型托卡马克超导装置的超导线圈在快速励磁条件下 ,将在线圈中产生很大的感应电压噪声 ,可能比用于失超检测的电阻电压大几个量级 ,同时在大电流和快速励磁条件下失超保护对确保装置安全变得尤为重要。文中主要提出在超导线圈大电流和快速励磁条件下如何进行正确失超保护的一种方便又可行的工程方法 ,并在中科院等离子体所对 HT- 7U第一个超导中心螺管原型线圈进行的性能测试实验中取得了成功。

A Method of How to Improve Quench Protection when Flux of Superconducting Coil Alter Greatly and Recent Experimental Results

Quench protection is very important to make sure the Superconducting Tokamak equipment is in safety. But as the excitative speed of superconducting coil was increased, inductive voltage noise was also increased quickly. Sometimes the noise voltage can reach ten times larger than the detective voltage which is used for detecting whether coil quench or not. In this paper, the author provided an engineering method to detect quench as the excitation speed of superconducting coil reach high. The recent experimental results on superconducting Tokamak showed that the method used is successful and convenient.