{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"99e94f20a0fdc2da62122c7f9bacff105670e2134bb437c20ccf2f6e72ff5d95","created":"2026-10-03T07:17:56Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"17ecb9dcca6c4b93731c1f8e19f721246878c01fc6ce38b1160ba62e6db1e706","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"beams.advanced-structures.dielectric-gv-breakdown","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Dielectric tubes driven by very short electron bunches survive fields far above what copper tolerates, then fail at a threshold whose cause is unclear.","posed_since":"","precise":"Fused-silica and diamond structures driven by sub-picosecond electron bunches (sigma_z ~ 2e-3 to 1e-2 cm) sustained surface fields of order $eE \\sim 100\\ \\mathrm{MeV}/\\mathrm{cm}$ before damage (SLAC experiments from 2008 onward). Determine the damage mechanism and its scaling with field duration from 0.1 to 10 ps and with band gap, separating field-induced ionization, heating by beam halo, and surface charging.","problem_ref":null,"references":"","settled_by":"Threshold measurements versus pulse duration for at least two materials of different band gap, compared with ionization and heating models.","status_note":"","title":"Damage mechanism of dielectrics under picosecond wakefields","topic_ref":"b7298016c1710150668f62e56e87b36d9f62eb89c17a03f22442da1d6e9f7f80"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"b2ee2aba3f3c05bae3f2a3dc8fa8e068fab85649073fb1d24b1f753c4a645593","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"dbdf3d97863e8ad95e38ca7f60ea5571ab0f3c70b83c59556491d005355b6cf7","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"VWIVrttac19UmX2Qxw0jO6hpqXPic4793Mjdflpj0yfdZPKH3CIWLdfYznWI0AihGo8m4NWNGbYztMtzv3g0CQ"},"schema":"pubphys.envelope/1"},"record_hash":"b2ee2aba3f3c05bae3f2a3dc8fa8e068fab85649073fb1d24b1f753c4a645593","leaf_index":642}