Jong-Kyu Park et al 2008 Nucl. Fusion 48 045006 doi:10.1088/0029-5515/48/4/045006
Jong-Kyu Park1, Allen H. Boozer2, Jonathan E. Menard1 and Michael J. Schaffer3
Show affiliationsA new method for correcting magnetic field errors in the ITER tokamak is developed using the Ideal Perturbed Equilibrium Code. The dominant external magnetic field for driving islands is shown to be localized to the outboard midplane for three ITER equilibria that represent the projected range of operational scenarios. The coupling matrices between the poloidal harmonics of the external magnetic perturbations and the resonant fields on the rational surfaces that drive islands are combined for different equilibria and used to determine an ordered list of the dominant errors in the external magnetic field. It is found that efficient and robust error field correction is possible with a fixed setting of the correction currents relative to the currents in the main coils across the range of ITER operating scenarios that was considered.
52.55.Fa Tokamaks, spherical tokamaks
52.40.Hf Plasma-material interactions; boundary layer effects
Issue 4 (April 2008)
Received 21 November 2007, accepted for publication 31 January 2008
Published 28 February 2008
Jong-Kyu Park et al 2008 Nucl. Fusion 48 045006
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