Identification of magnetic islands in Heliotron J experiments

摘要

The equilibrium response on the magnetic island produced by external perturbed coils is studied in a Heliotron J plasma. In order to identify the equilibrium response, the magnetic diagnostic system is developped. This system consists of two parts. One is the diagnostic system based on the toroidal array of the magnetic probe. Another is a numerical code based on the 3D MHD equilibrium calculation code. Using the diagnostic system, the perturbation field friven by the equilibrium response is identified