{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:6DNJIU56CT5AACN3UIYSPTXOEY","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":"0d011927a9aec05735568fbbf4d1afbbfd862d30f6e12459697db036fb074669","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2013-08-26T10:42:29Z","title_canon_sha256":"7432b7651562c6b371475159bf06dd6a3512fd5173551ab08133cf286a8fa2d2"},"schema_version":"1.0","source":{"id":"1308.5538","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.5538","created_at":"2026-05-18T03:14:18Z"},{"alias_kind":"arxiv_version","alias_value":"1308.5538v2","created_at":"2026-05-18T03:14:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.5538","created_at":"2026-05-18T03:14:18Z"},{"alias_kind":"pith_short_12","alias_value":"6DNJIU56CT5A","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6DNJIU56CT5AACN3","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6DNJIU56","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:a9dacee7f606f9da456e7bed1227475277d4d2a9a4a1d9cc185e52f35359aa38","target":"graph","created_at":"2026-05-18T03:14:18Z","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":"Initial studies of a 2-colour FEL amplifier using one monoenergetic electron beam are presented. The interaction is modelled using the unaveraged, broadband FEL code Puffin. A series of undulator modules are tuned to generate two resonant frequencies along the FEL interaction and a self-consistent 2-colour FEL interaction at widely spaced non-harmonic wavelengths at 1nm and 2.4nm is demonstrated.","authors_text":"B.W.J. McNeil, L.T. Campbell, S. Reiche","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2013-08-26T10:42:29Z","title":"Investigation of a 2-Colour Undulator FEL Using Puffin"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.5538","kind":"arxiv","version":2},"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":"sha256:24bd96b77c69f5ad57d0aeb2179a88363d8ece8aab2e43cf16d22d0f27434d00","target":"record","created_at":"2026-05-18T03:14:18Z","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":"0d011927a9aec05735568fbbf4d1afbbfd862d30f6e12459697db036fb074669","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2013-08-26T10:42:29Z","title_canon_sha256":"7432b7651562c6b371475159bf06dd6a3512fd5173551ab08133cf286a8fa2d2"},"schema_version":"1.0","source":{"id":"1308.5538","kind":"arxiv","version":2}},"canonical_sha256":"f0da9453be14fa0009bba23127ceee261f52a27f44248b737aeb98c0333557dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f0da9453be14fa0009bba23127ceee261f52a27f44248b737aeb98c0333557dc","first_computed_at":"2026-05-18T03:14:18.915486Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:14:18.915486Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TlNYpbiHLXsaiiLPnKvwL1jqN9mm96oZ+DXECVSIkcaf9XYonlV2IwXjTfVQ8Ya8s7HVQd9sCIPsQji1lBfRAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:14:18.916335Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.5538","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24bd96b77c69f5ad57d0aeb2179a88363d8ece8aab2e43cf16d22d0f27434d00","sha256:a9dacee7f606f9da456e7bed1227475277d4d2a9a4a1d9cc185e52f35359aa38"],"state_sha256":"e3986997afb21cf43ad02caaa59d97fa36e87dc1b53ca732d6b8d6740e6cecf1"}