{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6SNSSRLIOJCTWE7RATOOFYFBWJ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d0aadab743405f88ed9b7e37379f238f54da9db454bb7ee934cc20cf3d2c0b08","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-07-11T14:41:00Z","title_canon_sha256":"9a25de9d5ab305a9012a359374448d4229ecddde94402a5c5ddbd3c53bc7e1ce"},"schema_version":"1.0","source":{"id":"1807.04165","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.04165","created_at":"2026-05-18T00:01:58Z"},{"alias_kind":"arxiv_version","alias_value":"1807.04165v3","created_at":"2026-05-18T00:01:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.04165","created_at":"2026-05-18T00:01:58Z"},{"alias_kind":"pith_short_12","alias_value":"6SNSSRLIOJCT","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"6SNSSRLIOJCTWE7R","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"6SNSSRLI","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:d37390d8c8a55751f9588120c7ae4de7d9c72ebb98e5b18d4fb5459cf3479553","target":"graph","created_at":"2026-05-18T00:01:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The injection of electrons into a laser wakefield accelerator (LWFA) is observed to generate an intense coherent ultra-broadband and ultrashort pulse radiation flash, consistent with the acceleration of electrons from rest to nearly the speed of light in a distance < ~ 1 $\\mu$m. The flash is sufficiently bright to induce large nonlinear refractive index shifts in optical materials; we estimate a source brightness temperature of ~$10^{18}$ K. We present measurements of the flash spectra, coherence, pulse duration, polarization and angular distribution, providing a detailed picture of electron i","authors_text":"A. J. Goers, B. Miao, D. Woodbury, F. Salehi, H. M. Milchberg, J. Elle, J. K. Wahlstrand, L. Feder","cross_cats":["physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-07-11T14:41:00Z","title":"Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.04165","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:17979e5862d6859f39b61aad672480c686f7457a0ba4aa72a3f23d5e6231d613","target":"record","created_at":"2026-05-18T00:01:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d0aadab743405f88ed9b7e37379f238f54da9db454bb7ee934cc20cf3d2c0b08","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-07-11T14:41:00Z","title_canon_sha256":"9a25de9d5ab305a9012a359374448d4229ecddde94402a5c5ddbd3c53bc7e1ce"},"schema_version":"1.0","source":{"id":"1807.04165","kind":"arxiv","version":3}},"canonical_sha256":"f49b29456872453b13f104dce2e0a1b2600a37c3ab5c885d2f2f4154f024a4eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f49b29456872453b13f104dce2e0a1b2600a37c3ab5c885d2f2f4154f024a4eb","first_computed_at":"2026-05-18T00:01:58.669508Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:58.669508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qsmt0RkcNqNHXH6msAd+67y2o56KAeQjcOWCgZ1gvS5gowCrmnUd57B8/l4ONaSSBreH6X4TiXQ2cP0XBH52Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:58.670228Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.04165","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17979e5862d6859f39b61aad672480c686f7457a0ba4aa72a3f23d5e6231d613","sha256:d37390d8c8a55751f9588120c7ae4de7d9c72ebb98e5b18d4fb5459cf3479553"],"state_sha256":"0ca711a3bc317afafb82f414335e7bea7cdf48120c99d4ce0e83a0cadc783d6a"}