Abstract
For the safe and efficient discharge operation, it is essential to real-time determine the plasma current center and guide the parameters modification in the vertical field coil current feedback control system. In this paper, we analyze the limitation of the method of measuring the plasma displacement by using single-turn loops, which was used in the vertical field coil current feedback control system on iron-core tokamak HT-7. In addition, we introduce a new method to estimate the plasma current center using the external magnetic measurements on iron-core tokamak. This method has been validated by several HT-7 discharges. The simulation and discussion of measured values by this method is presented.
Published Version
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