{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"f23dbcfb41d7f28bda51ffec6b71263e7a2121520118c4c97b5c641f83ec55d1","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["7bf39292d6be300b24a52eedd9675ad371189ab330604725097bc9707476af6f","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"eee96e6bf5b78d58ab1eb23654e288eecd879a59bfb21f26c27f0858827cafe2","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"plasma.disruptions.thermal-quench","kind":"phenomenon","literature_status":"open","n":"2","parents":[],"plain":"In a disruption the plasma loses nearly all its heat in about a millisecond, much faster than normal leakage. How the magnetic field becomes tangled to allow this, and where the heat goes, is not predictable.","posed_since":"","precise":"Identify what sets the thermal quench duration (about $10^{-3}$ s or less in large tokamaks): magnetic stochastization by global MHD modes, radiative collapse, and parallel heat transport in stochastic fields. Predict the quench time, the radiated versus conducted energy fraction and the wall heat-load distribution for ITER. An answer is 3D nonlinear MHD with validated kinetic heat-flux closures reproducing measured quench times across devices.","problem_ref":"7bf39292d6be300b24a52eedd9675ad371189ab330604725097bc9707476af6f","references":"","settled_by":"3D nonlinear MHD simulations that reproduce measured thermal-quench times and radiation fractions on at least three tokamaks.","status_note":"","title":"Mechanism and duration of the disruption thermal quench","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"382b6fef1843e1e66ff764e1b672241a570b33403d7cf4617fc9ca23b8268526","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"6e103408447ab6ebcf6f7548de848e64d862529c6d033ae759f47243fd9257dc","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"gv5Izp2f-vwobvJTqX7XZWi_xPjkHDDbzlF7gpyjkVXLCo3MIEEvRNybgsDiiDqJpBAaB3QShjTKJW0_SwLzBg"},"schema":"pubphys.envelope/1"},"record_hash":"382b6fef1843e1e66ff764e1b672241a570b33403d7cf4617fc9ca23b8268526","leaf_index":3562}