{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"302eaa9b54bc219c07d19a33750d8d30d587f046320d02bab6c40028390eda6a","created":"2026-10-03T07:18:08Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"e431538e54415bcb55499c6e4d077ebd214e5f2098f94b96bb5c1ffb496cc765","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"plasma.edge-pedestal-elms.rmp-elm-iter","kind":"well-posed","literature_status":"open","n":"1","parents":[],"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.","posed_since":"","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.","problem_ref":null,"references":"","settled_by":"A validated penetration-threshold model applied to ITER, then ITER high-performance operation.","status_note":"","title":"Will resonant magnetic perturbations suppress ELMs in 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