{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CLYXLWBFTBGCI4I3YLE4B4VYYH","short_pith_number":"pith:CLYXLWBF","canonical_record":{"source":{"id":"1804.04252","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-04-11T23:07:19Z","cross_cats_sorted":[],"title_canon_sha256":"ae640dab1680ccc1859429d56df3cc713bfff2c94d9c4ecc444cf52e59b216fb","abstract_canon_sha256":"ae7e841a2d9afad0bfefd7e7272ead6508cf71cff1a02e906dcc0400945afbfa"},"schema_version":"1.0"},"canonical_sha256":"12f175d825984c24711bc2c9c0f2b8c1c2944d6fe6f68656c24aeb646e2d43e5","source":{"kind":"arxiv","id":"1804.04252","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04252","created_at":"2026-05-18T00:18:40Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04252v1","created_at":"2026-05-18T00:18:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04252","created_at":"2026-05-18T00:18:40Z"},{"alias_kind":"pith_short_12","alias_value":"CLYXLWBFTBGC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CLYXLWBFTBGCI4I3","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CLYXLWBF","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CLYXLWBFTBGCI4I3YLE4B4VYYH","target":"record","payload":{"canonical_record":{"source":{"id":"1804.04252","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-04-11T23:07:19Z","cross_cats_sorted":[],"title_canon_sha256":"ae640dab1680ccc1859429d56df3cc713bfff2c94d9c4ecc444cf52e59b216fb","abstract_canon_sha256":"ae7e841a2d9afad0bfefd7e7272ead6508cf71cff1a02e906dcc0400945afbfa"},"schema_version":"1.0"},"canonical_sha256":"12f175d825984c24711bc2c9c0f2b8c1c2944d6fe6f68656c24aeb646e2d43e5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:40.200684Z","signature_b64":"gYsqrEzHnJbMwZvjR/t8v+E88XHh9kBhY/lUPh8OlbG5IYy4k+gINOlkWKKOJ1jXpRgTVHYGsS8iE8zivMwWBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12f175d825984c24711bc2c9c0f2b8c1c2944d6fe6f68656c24aeb646e2d43e5","last_reissued_at":"2026-05-18T00:18:40.199882Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:40.199882Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.04252","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:18:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CF7ZV/DtIGxnPgntOnc7QjAkY1y8ld6WqcdNB+6WWbiC5fqrare27jhbrmVWncJjteNQQtesH5eA1np5nMn4Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:03:23.477131Z"},"content_sha256":"c0f45f40f6b755017e1220d25e871b146a4033115ab6fc69e2220d3a92d0ca00","schema_version":"1.0","event_id":"sha256:c0f45f40f6b755017e1220d25e871b146a4033115ab6fc69e2220d3a92d0ca00"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CLYXLWBFTBGCI4I3YLE4B4VYYH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generation and Measurement of Sub-Micrometer Relativistic Electron Beams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"Christian David, Cigdem Ozkan-Loch, Eduard Prat, Eugenio Ferrari, Gian Luca Orlandi, Martin Bednarzik, Rasmus Ischebeck, Simona Borrelli, Vitaliy A. Guzenko","submitted_at":"2018-04-11T23:07:19Z","abstract_excerpt":"The generation of low-emittance electron beams has received significant interest in recent years. Driven by the requirements of X-ray free electron lasers, the emittance of photocathode injectors has been reduced significantly, with a corresponding increase in beam brightness. At the same time, this has put increasingly stringent requirements on the instrumentation to measure the beam size. These requirements are even more stringent for novel accelerator developments, such as laser-driven accelerators based on dielectric structures or on a plasma, or for linear colliders at the energy frontier"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04252","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:18:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ReGnk34dMfUpROTbBpwuSmDc2ipAZVBhO3/yUQqWhnaivHVO1hzqcF+eMfDSX6Wot1g5MKksRsZcmnbOLuRPAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:03:23.477500Z"},"content_sha256":"e8d56b25a9012ad551fff5f2140a2bef0cf50355d5139092a29dde8d4fb51baf","schema_version":"1.0","event_id":"sha256:e8d56b25a9012ad551fff5f2140a2bef0cf50355d5139092a29dde8d4fb51baf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH/bundle.json","state_url":"https://pith.science/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T15:03:23Z","links":{"resolver":"https://pith.science/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH","bundle":"https://pith.science/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH/bundle.json","state":"https://pith.science/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CLYXLWBFTBGCI4I3YLE4B4VYYH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CLYXLWBFTBGCI4I3YLE4B4VYYH","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":"ae7e841a2d9afad0bfefd7e7272ead6508cf71cff1a02e906dcc0400945afbfa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-04-11T23:07:19Z","title_canon_sha256":"ae640dab1680ccc1859429d56df3cc713bfff2c94d9c4ecc444cf52e59b216fb"},"schema_version":"1.0","source":{"id":"1804.04252","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04252","created_at":"2026-05-18T00:18:40Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04252v1","created_at":"2026-05-18T00:18:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04252","created_at":"2026-05-18T00:18:40Z"},{"alias_kind":"pith_short_12","alias_value":"CLYXLWBFTBGC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CLYXLWBFTBGCI4I3","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CLYXLWBF","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:e8d56b25a9012ad551fff5f2140a2bef0cf50355d5139092a29dde8d4fb51baf","target":"graph","created_at":"2026-05-18T00:18:40Z","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 generation of low-emittance electron beams has received significant interest in recent years. Driven by the requirements of X-ray free electron lasers, the emittance of photocathode injectors has been reduced significantly, with a corresponding increase in beam brightness. At the same time, this has put increasingly stringent requirements on the instrumentation to measure the beam size. These requirements are even more stringent for novel accelerator developments, such as laser-driven accelerators based on dielectric structures or on a plasma, or for linear colliders at the energy frontier","authors_text":"Christian David, Cigdem Ozkan-Loch, Eduard Prat, Eugenio Ferrari, Gian Luca Orlandi, Martin Bednarzik, Rasmus Ischebeck, Simona Borrelli, Vitaliy A. Guzenko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-04-11T23:07:19Z","title":"Generation and Measurement of Sub-Micrometer Relativistic Electron Beams"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04252","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:c0f45f40f6b755017e1220d25e871b146a4033115ab6fc69e2220d3a92d0ca00","target":"record","created_at":"2026-05-18T00:18:40Z","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":"ae7e841a2d9afad0bfefd7e7272ead6508cf71cff1a02e906dcc0400945afbfa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-04-11T23:07:19Z","title_canon_sha256":"ae640dab1680ccc1859429d56df3cc713bfff2c94d9c4ecc444cf52e59b216fb"},"schema_version":"1.0","source":{"id":"1804.04252","kind":"arxiv","version":1}},"canonical_sha256":"12f175d825984c24711bc2c9c0f2b8c1c2944d6fe6f68656c24aeb646e2d43e5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12f175d825984c24711bc2c9c0f2b8c1c2944d6fe6f68656c24aeb646e2d43e5","first_computed_at":"2026-05-18T00:18:40.199882Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:40.199882Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gYsqrEzHnJbMwZvjR/t8v+E88XHh9kBhY/lUPh8OlbG5IYy4k+gINOlkWKKOJ1jXpRgTVHYGsS8iE8zivMwWBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:40.200684Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.04252","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0f45f40f6b755017e1220d25e871b146a4033115ab6fc69e2220d3a92d0ca00","sha256:e8d56b25a9012ad551fff5f2140a2bef0cf50355d5139092a29dde8d4fb51baf"],"state_sha256":"8d04b3a96bd373e662031f0870c384e21906cbf52068e31d1883bfa6f7e34885"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GSOZC2eE6nouEfhNVt2JhdLsz7EHvnM8RA0y+YTDrJy00HiKmtfMXPQBZ12KBelwBmF1+OPF5w5EiALGVKQIAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:03:23.479889Z","bundle_sha256":"8277d391021dd93d6566ab6646befa876b9e948cda939f2bd440c04a338389e7"}}