{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:66SFAJNS4KCGTSRAV5AQEFPYMP","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":"6d6d7e0c7b34ff703e16cb7f01b89e16cfc4103382fc77605bbe45c4e14762e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-06-04T14:06:32Z","title_canon_sha256":"e6754f50fdbc2ab04a07cab7092b6500cea6bb06c5b2e32880afc5655447d700"},"schema_version":"1.0","source":{"id":"1906.01996","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.01996","created_at":"2026-05-17T23:43:14Z"},{"alias_kind":"arxiv_version","alias_value":"1906.01996v2","created_at":"2026-05-17T23:43:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.01996","created_at":"2026-05-17T23:43:14Z"},{"alias_kind":"pith_short_12","alias_value":"66SFAJNS4KCG","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"66SFAJNS4KCGTSRA","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"66SFAJNS","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:5c881c20abb886ae6f95d38cae1d7630d1dab3083fa1aa4ba398b378d93a1007","target":"graph","created_at":"2026-05-17T23:43:14Z","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":"Free-electron lasers (FELs) operate at wavelengths down to hard x-rays, and are either seeded or start from noise. There is increasing interest in x-ray FELs that rely on Self-Amplified Spontaneous Emission (SASE), and this involves increasing simulation activity in the design, optimization, and characterization of these x-ray FELs. Most of the simulation codes in use rely on the Slowly-Varying Envelope Approximation (SVEA) in which Maxwell's equations are averaged over the fast time scale resulting in relatively small computational requirements. While the SVEA codes are generally successful, ","authors_text":"B.W.J. McNeil, H.P. Freund, J. Henderson, L.T. Campbell, P.J.M. van der Slot, P. Traczykowski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-06-04T14:06:32Z","title":"Comparison Between, and Validation Against an Experiment of, a Slowly-Varying Envelope Approximation Code and a Particle-in-Cell Simulation Code for Free-Electron Lasers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.01996","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":"sha256:102cec39972415b0bb1e324eb2258b32355e92a1c900fe8689a89b8aaa09c570","target":"record","created_at":"2026-05-17T23:43:14Z","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":"6d6d7e0c7b34ff703e16cb7f01b89e16cfc4103382fc77605bbe45c4e14762e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2019-06-04T14:06:32Z","title_canon_sha256":"e6754f50fdbc2ab04a07cab7092b6500cea6bb06c5b2e32880afc5655447d700"},"schema_version":"1.0","source":{"id":"1906.01996","kind":"arxiv","version":2}},"canonical_sha256":"f7a45025b2e28469ca20af410215f863d43ce88deaaa5454544e47a250cb9ee0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7a45025b2e28469ca20af410215f863d43ce88deaaa5454544e47a250cb9ee0","first_computed_at":"2026-05-17T23:43:14.170561Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:14.170561Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CK3D3LrYda5uvK3rImaVmJs1uQ2bluq8Xp8BQBjEPvQAKAdbJvMVItULgXjnX0uTv7y0FAzi8TR5hQrThRQ2BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:14.171176Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.01996","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:102cec39972415b0bb1e324eb2258b32355e92a1c900fe8689a89b8aaa09c570","sha256:5c881c20abb886ae6f95d38cae1d7630d1dab3083fa1aa4ba398b378d93a1007"],"state_sha256":"7e91f0cd25b9da9a3ae53381b89b2e25034fd878191b98e174944110630a042a"}