{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"0e0c38ae6c482553421fa9208970e8f5f510f3221103ad7a94452f25315eeda4","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["1232e316b4be45583bb6dcd5ac916d6816dc4afc88101513c9accd1e54df653b","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"931f0cf4fdf635512e928ff8c91a3c309fec47ba1babeaa184305fabe68d31eb","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"beams.rf-breakdown.local-field-criterion","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"Engineers judge whether a new structure will spark using rules of thumb based on surface field, surface heating or energy flow; it is unknown whether one quantity works for all designs.","posed_since":"","precise":"Candidate criteria include the peak surface electric field, the pulsed surface temperature rise $\\Delta T$, and the modified Poynting vector $S_{c} = \\operatorname{Re}(S) + \\operatorname{Im}(S)/6$ proposed in 2009. Determine whether a single local quantity predicts the breakdown-limited gradient across structure geometries, frequencies $1\\text{-}30\\,\\mathrm{GHz}$ and DC spark systems to within 20 percent at fixed breakdown rate and pulse length, or whether the limit is irreducibly geometry dependent.","problem_ref":"1232e316b4be45583bb6dcd5ac916d6816dc4afc88101513c9accd1e54df653b","references":"","settled_by":"A blind comparison of predicted and measured limits for a set of structures differing in geometry and frequency.","status_note":"","title":"Which local field quantity determines the breakdown-limited gradient?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"ae8d650be34cc2282f123dc0488592dfc1cde260f60e8e982c0c39568be9a529","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"0b3af36c48b905f63d4cd2694ecfd77bc39beba240bfc724b4fcecb08c23887c","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"bJCKI23zypqi9t9ONRLmb6ck3lWXyYlanDHWBqpyt8wix8BWqbyObb1NbKt90FkcgeNOWK9YyF-7OXSjiMeeAA"},"schema":"pubphys.envelope/1"},"record_hash":"ae8d650be34cc2282f123dc0488592dfc1cde260f60e8e982c0c39568be9a529","leaf_index":2518}