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Report No.
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Preliminary results on the reconstruction of ITER plasma separatrix by using Cauchy condition surface method

Miyata, Yoshiaki; Ide, Shunsuke; Hayashi, Nobuhiko

It is necessary to precisely determine the plasma separatrix from the magnetic measurement signals located outside the plasma in order to stably control the plasma equilibrium in tokamak devices. The Cauchy condition surface (CCS) method is a numerical approach for calculating the spatial distribution of the magnetic flux outside a hypothetical surface and reconstructing the plasma separatrix from the magnetic measurement signals located outside the plasma. The CCS method has been applied to ITER and it was known that the accurate plasma separatrix can be reconstructed even with the magnetic measurement noise. The accuracy of ITER plasma separatrix by using CCS method is reported.

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