I.T. Chapman et al 2007 Nucl. Fusion 47 L36 doi:10.1088/0029-5515/47/11/L02
I.T. Chapman1, T.C. Hender1, D.F. Howell1, S.K. Erents1, M. P. Gryaznevich1, S. Shibaev1, M.F. Stamp1, E. de la Luna2, A. Savchkov3, R. Scannell4, the MAST team and JET EFDA Contributors
Show affiliationsThe effects of applied three-dimensional magnetic error fields on magnetic surfaces are measured in both the Joint European Torus (JET) and the Mega Ampère Spherical Tokamak (MAST). Static perturbation fields with various amplitudes have been applied in both devices using non-axisymmetric coils producing a dominantly n = 1 magnetic field to systematically perturb the plasma flux surfaces. The displacement of the plasma boundary is found to increase linearly with the strength of the applied field, and agrees well with predictive modelling which superimposes vacuum non-axisymmetric fields on a 2D equilibrium.
52.55.Fa Tokamaks, spherical tokamaks
52.40.Hf Plasma-material interactions; boundary layer effects
Issue 11 (November 2007)
Received 13 July 2007, accepted for publication 25 September 2007
Published 19 October 2007
I.T. Chapman et al 2007 Nucl. Fusion 47 L36
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