Revision 2

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Title · changed: Revision 1: Will resonant magnetic perturbations suppress ELMs in ITER; Revision 2: Will resonant magnetic perturbations suppress ELMs in ITER?
Plain: ELMs would erode ITER's wall too fast if left alone. Small helical magnetic perturbations from extra coils can suppress them in present tokamaks, but only in narrow conditions.
Precise: Resonant magnetic perturbations (RMPs, applied nonaxisymmetric fields with toroidal mode number $n=1\ \text{to}\ 4$) suppress type-I ELMs in DIII-D, KSTAR, EAST and ASDEX Upgrade in narrow windows of edge safety factor $q_{95}$ and at low pedestal collisionality, apparently when the field penetrates as an island near the pedestal top. Determine, with validated two-fluid nonlinear MHD, whether the ITER coil set achieves penetration and suppression in the $Q=10$ baseline at ITER pedestal collisionality and rotation. An answer is yes or no with predicted $q_{95}$ windows and required coil current.
Settled by: A validated penetration-threshold model applied to ITER, then ITER high-performance operation.
Kind: well-posed
Answer type: yes-no
References: (empty)
Literature status: open
Status note: (empty)
Posed since: (empty)

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