{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:KS3YBXPULFSTFHY4SP4KDCW6MV","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":"71dddc19b65dcc496f06a1e700f6e35ca780a80df07097e2fa79bbd270f6bde6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2010-10-08T10:19:10Z","title_canon_sha256":"5a946fa3cd5d2d3365d3ced5885a1421a2ed1108651ac07e470fa9e59c438ed6"},"schema_version":"1.0","source":{"id":"1010.1647","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1647","created_at":"2026-05-18T04:38:39Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1647v1","created_at":"2026-05-18T04:38:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1647","created_at":"2026-05-18T04:38:39Z"},{"alias_kind":"pith_short_12","alias_value":"KS3YBXPULFST","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"KS3YBXPULFSTFHY4","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"KS3YBXPU","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:fb8f28cb275bf88e1036a01af7879e862d5925f4948e6750a09c4c7d3f52ef95","target":"graph","created_at":"2026-05-18T04:38:39Z","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":"This report is a primer introduction on the sources of coherent syncrotron radiation from FELs compared to conventional lasers. Even though the underlying mechanisms are different, FELs can be considered a laser source to all effects. In fact FEL is based on the stimulated emission of virtual photons by a relativistic electron beam, passing through an undulator/wiggler, much like conventional lasers exploit the stimulated emission by an atomic/molecular system on which a population inversion has been realized. FEL operation is illustrated by means of the usual set of parameters (gain, saturati","authors_text":"G. Dattoli, M. Del Franco, M. Labat, P.L. Ottaviani, S. Pagnutti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2010-10-08T10:19:10Z","title":"Introduction to the Physics of Free Electron Laser and Comparison with Conventional Laser Sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1647","kind":"arxiv","version":1},"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":"sha256:5e3b02d640d5deb705bb3cde2192e3a7db8c522a020c92d6ba4faa05f49c0d17","target":"record","created_at":"2026-05-18T04:38:39Z","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":"71dddc19b65dcc496f06a1e700f6e35ca780a80df07097e2fa79bbd270f6bde6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2010-10-08T10:19:10Z","title_canon_sha256":"5a946fa3cd5d2d3365d3ced5885a1421a2ed1108651ac07e470fa9e59c438ed6"},"schema_version":"1.0","source":{"id":"1010.1647","kind":"arxiv","version":1}},"canonical_sha256":"54b780ddf45965329f1c93f8a18ade657b767ca8aede2a8724d275133e086636","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"54b780ddf45965329f1c93f8a18ade657b767ca8aede2a8724d275133e086636","first_computed_at":"2026-05-18T04:38:39.348722Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:38:39.348722Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ITlYKPAsaKyQMu345BB3GSYwbuiaFvhLTAb24vTjR8/UIEk3yLQ0wyhDA/eiLG6/zIwC7DukevcVzS7vV11jAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:38:39.349611Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.1647","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e3b02d640d5deb705bb3cde2192e3a7db8c522a020c92d6ba4faa05f49c0d17","sha256:fb8f28cb275bf88e1036a01af7879e862d5925f4948e6750a09c4c7d3f52ef95"],"state_sha256":"ec3d140cc21253fe756fd550a4649f49f13b8df3f0e861ed5f55d8b9d25b9320"}