{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"f2315554eb0bbacc75d9526125666a6fba97816219c904c049d273e966095865","created":"2026-10-03T07:17:56Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"016591584979c5f1bd5eb93716806a07659f793133fe0598f3968866fb006c63","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"beams.superheating-field.dynamic-hsh","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"The superheating field is calculated for a steady field, but cavity fields oscillate a billion times per second. Whether the limit is higher, lower or the same under such fast oscillation is not settled.","posed_since":"","precise":"Compute the dynamic superheating field $H_{\\mathrm{sh}}(f,T)$ for an s-wave superconductor driven at $f\\sim 0.1\\text{ to }10\\,\\mathrm{GHz}$, including nonequilibrium quasiparticles and the finite vortex nucleation time, using nonequilibrium quasiclassical (Keldysh-Usadel or Eilenberger) dynamics valid at $T << T_{c}$; time-dependent Ginzburg-Landau theory may be used only as a check near $T_{c}$. An answer gives $H_{\\mathrm{sh}}(f,T)/H_{\\mathrm{sh}}(0,T)$ for Nb and Nb3Sn and the frequency at which it departs from the static value.","problem_ref":null,"references":"","settled_by":"A microscopic nonequilibrium calculation checked against pulsed RF measurements of the quench field versus frequency and pulse length.","status_note":"","title":"Superheating field of a superconductor under GHz radio-frequency drive","topic_ref":"8435c3a546282d17b0eb844e640d9eefc95ff411015bd07858913254362d02e5"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9c4d47388adaf85a19469df38e4bc899d0a05ef3e384ae972ca6a103f3323ebd","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"1dba9191bf04760516a9ceba80a18ce115fd80d09c8e36e15f7b1d054b9eb4bc","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"7v46puYvlHVHxuojoc38KyDbtDV84zQQlamCKuRuzCy33a1nFw_rZV2QFovjK2TPm3z5TmqayfXT8NxrviJLAg"},"schema":"pubphys.envelope/1"},"record_hash":"9c4d47388adaf85a19469df38e4bc899d0a05ef3e384ae972ca6a103f3323ebd","leaf_index":712}