{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"0f6d32d102f84e75a1a684198df682097d1f6c35b9190ac7e3aec79e27cd14b5","created":"2026-10-03T07:18:08Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"4e259817f97b0a71f058e9847e8a5709a2ab587198d562bd93eacb94f77a0a7e","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"plasma.disruptions.asymmetric-vde-forces","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"When a tokamak loses vertical position control, the plasma drifts into the wall and drives large currents through the vessel. If this happens unevenly around the machine, it pushes the vessel sideways, and the size of that push for ITER is uncertain.","posed_since":"","precise":"During vertical displacement events, halo currents flowing through plasma and wall can become toroidally asymmetric ($n = 1$ dominated, sometimes rotating), producing net horizontal forces on the vacuum vessel and possible resonance with vessel modes. Determine the peak toroidal asymmetry of halo current, its rotation and the resulting sideways force for ITER $15\\,\\mathrm{MA}$ disruptions, including the mechanism that drives the asymmetry (wall-touching kink, resistive-wall mode). An answer is a force estimate with uncertainty from 3D MHD validated on JET and another device.","problem_ref":null,"references":"","settled_by":"3D nonlinear MHD with resistive-wall coupling reproducing measured sideways forces and halo-current rotation on JET and a second tokamak, applied to ITER.","status_note":"","title":"Sideways forces from asymmetric vertical displacement events in ITER","topic_ref":"ea2728865d1aa024b91c5a88f675b822fd929225af4da0f04e206330d21409ab"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"f43d77fa69bb3eb565112643125c9354715117ff4d44d81133e28498630236de","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"fdf853cb3ae0fb72b7889cfafe17bf73c7d9268ede7b1939f721ddf91f56771e","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"8Zwei4ayl7CzA2dW1OVHV3E6brvSHoGm8dBwp3ADJ_Jd2hqisP8dMd0NxWWDIqhwRo59pOf6J-mZ3jxMtl_XAg"},"schema":"pubphys.envelope/1"},"record_hash":"f43d77fa69bb3eb565112643125c9354715117ff4d44d81133e28498630236de","leaf_index":1826}