{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"9cfb69504c1d8982a4e878eb0070cdf5d33905815319f597d053afb193ada8d6","created":"2026-10-03T07:18:08Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"87ca88f895bc7729bbec13c4b8dfd28aa7e8b4053396bc67f390e50755c3d562","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":"1","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 1e-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":null,"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":"ea2728865d1aa024b91c5a88f675b822fd929225af4da0f04e206330d21409ab"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"7bf39292d6be300b24a52eedd9675ad371189ab330604725097bc9707476af6f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"2e4adc80c31692c3637e480c33dc34f49f42c1cc2a1d22a85f6a17337c26009b","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"T9ggIYeXnbR0s2YvvJ1s5PycYIAoIBmYJ-A1uGuUrZGhqwGwRBzNf80isxMRKgu3VOV199NGDN3l-cDLQCQXAg"},"schema":"pubphys.envelope/1"},"record_hash":"7bf39292d6be300b24a52eedd9675ad371189ab330604725097bc9707476af6f","leaf_index":1830}