{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2VPDOQA44AYUEEMXPGA5BK4XRF","short_pith_number":"pith:2VPDOQA4","canonical_record":{"source":{"id":"1309.3143","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-09-12T12:58:42Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"13b4c073d6da235bfaebb89b7e0da591662288c3d1047d25bde2f87e246f5635","abstract_canon_sha256":"aca22cb151c30bb072731934653f592f2adf84c3bd7c3d3ddbce8143a159717f"},"schema_version":"1.0"},"canonical_sha256":"d55e37401ce0314211977981d0ab978949661c1381eb95589fc1fb49dfc70348","source":{"kind":"arxiv","id":"1309.3143","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.3143","created_at":"2026-05-18T02:46:31Z"},{"alias_kind":"arxiv_version","alias_value":"1309.3143v2","created_at":"2026-05-18T02:46:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.3143","created_at":"2026-05-18T02:46:31Z"},{"alias_kind":"pith_short_12","alias_value":"2VPDOQA44AYU","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2VPDOQA44AYUEEMX","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2VPDOQA4","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2VPDOQA44AYUEEMXPGA5BK4XRF","target":"record","payload":{"canonical_record":{"source":{"id":"1309.3143","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-09-12T12:58:42Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"13b4c073d6da235bfaebb89b7e0da591662288c3d1047d25bde2f87e246f5635","abstract_canon_sha256":"aca22cb151c30bb072731934653f592f2adf84c3bd7c3d3ddbce8143a159717f"},"schema_version":"1.0"},"canonical_sha256":"d55e37401ce0314211977981d0ab978949661c1381eb95589fc1fb49dfc70348","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:46:31.267990Z","signature_b64":"77ajBmBxPNMzb5HK2p72HmhnUfCcJqglKIjVy6alPyIHtCrtUXEjiXsppMlHQz3QuNE7opwOD91CaBe9oKuiBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d55e37401ce0314211977981d0ab978949661c1381eb95589fc1fb49dfc70348","last_reissued_at":"2026-05-18T02:46:31.267568Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:46:31.267568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.3143","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:46:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GeemeyV1Zqq44ZgvZotPQUs2v3TnHDunQBUhEKkiJR/+xo0Q5P0/u4fXDLgXTKcEA3G+gPlU0POCDuerUwtUAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T17:52:52.742395Z"},"content_sha256":"01d6c75f2e144444b9b2b3ec4d46f0e71f400f14ba66d8bbec9c00c77f39fbe2","schema_version":"1.0","event_id":"sha256:01d6c75f2e144444b9b2b3ec4d46f0e71f400f14ba66d8bbec9c00c77f39fbe2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2VPDOQA44AYUEEMXPGA5BK4XRF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analytical Model of an Isolated Single-atom Electron Source","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.acc-ph"],"primary_cat":"physics.atom-ph","authors_text":"E.J.D. Vredenbregt, O.J. Luiten, W.J. Engelen","submitted_at":"2013-09-12T12:58:42Z","abstract_excerpt":"An analytical model of a single-atom electron source is presented, where electrons are created by near-threshold photoionization of an isolated atom. The model considers the classical dynamics of the electron just after the photon absorption, i.e. its motion in the potential of a singly charged ion and a uniform electric field used for acceleration. From closed expressions for the asymptotic transverse electron velocities and trajectories, the effective source temperature and the effective source size can be calculated. The influence of the acceleration field strength and the ionization laser "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.3143","kind":"arxiv","version":2},"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":"2026-05-18T02:46:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kL15RG+rGsBgBvBKkhS3haTAUXHKNUAocVNwZ7aEPehYKRTCPyzStcy/PUimFEYixY1MKZyMz/S4WvtOptsKDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T17:52:52.742763Z"},"content_sha256":"69c958df5e07df6b58396bbf35a956a7ad40a2ae0731f098ccecc6c371a23d32","schema_version":"1.0","event_id":"sha256:69c958df5e07df6b58396bbf35a956a7ad40a2ae0731f098ccecc6c371a23d32"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2VPDOQA44AYUEEMXPGA5BK4XRF/bundle.json","state_url":"https://pith.science/pith/2VPDOQA44AYUEEMXPGA5BK4XRF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2VPDOQA44AYUEEMXPGA5BK4XRF/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":"2026-08-22T17:52:52Z","links":{"resolver":"https://pith.science/pith/2VPDOQA44AYUEEMXPGA5BK4XRF","bundle":"https://pith.science/pith/2VPDOQA44AYUEEMXPGA5BK4XRF/bundle.json","state":"https://pith.science/pith/2VPDOQA44AYUEEMXPGA5BK4XRF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2VPDOQA44AYUEEMXPGA5BK4XRF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2VPDOQA44AYUEEMXPGA5BK4XRF","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":"aca22cb151c30bb072731934653f592f2adf84c3bd7c3d3ddbce8143a159717f","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-09-12T12:58:42Z","title_canon_sha256":"13b4c073d6da235bfaebb89b7e0da591662288c3d1047d25bde2f87e246f5635"},"schema_version":"1.0","source":{"id":"1309.3143","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.3143","created_at":"2026-05-18T02:46:31Z"},{"alias_kind":"arxiv_version","alias_value":"1309.3143v2","created_at":"2026-05-18T02:46:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.3143","created_at":"2026-05-18T02:46:31Z"},{"alias_kind":"pith_short_12","alias_value":"2VPDOQA44AYU","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2VPDOQA44AYUEEMX","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2VPDOQA4","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:69c958df5e07df6b58396bbf35a956a7ad40a2ae0731f098ccecc6c371a23d32","target":"graph","created_at":"2026-05-18T02:46:31Z","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":"An analytical model of a single-atom electron source is presented, where electrons are created by near-threshold photoionization of an isolated atom. The model considers the classical dynamics of the electron just after the photon absorption, i.e. its motion in the potential of a singly charged ion and a uniform electric field used for acceleration. From closed expressions for the asymptotic transverse electron velocities and trajectories, the effective source temperature and the effective source size can be calculated. The influence of the acceleration field strength and the ionization laser ","authors_text":"E.J.D. Vredenbregt, O.J. Luiten, W.J. Engelen","cross_cats":["physics.acc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-09-12T12:58:42Z","title":"Analytical Model of an Isolated Single-atom Electron Source"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.3143","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":"sha256:01d6c75f2e144444b9b2b3ec4d46f0e71f400f14ba66d8bbec9c00c77f39fbe2","target":"record","created_at":"2026-05-18T02:46:31Z","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":"aca22cb151c30bb072731934653f592f2adf84c3bd7c3d3ddbce8143a159717f","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-09-12T12:58:42Z","title_canon_sha256":"13b4c073d6da235bfaebb89b7e0da591662288c3d1047d25bde2f87e246f5635"},"schema_version":"1.0","source":{"id":"1309.3143","kind":"arxiv","version":2}},"canonical_sha256":"d55e37401ce0314211977981d0ab978949661c1381eb95589fc1fb49dfc70348","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d55e37401ce0314211977981d0ab978949661c1381eb95589fc1fb49dfc70348","first_computed_at":"2026-05-18T02:46:31.267568Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:46:31.267568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"77ajBmBxPNMzb5HK2p72HmhnUfCcJqglKIjVy6alPyIHtCrtUXEjiXsppMlHQz3QuNE7opwOD91CaBe9oKuiBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:46:31.267990Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.3143","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01d6c75f2e144444b9b2b3ec4d46f0e71f400f14ba66d8bbec9c00c77f39fbe2","sha256:69c958df5e07df6b58396bbf35a956a7ad40a2ae0731f098ccecc6c371a23d32"],"state_sha256":"7189c9aed4bc07c0db12c05dd91cbaa7c7d7e16f6c79ee8bc3b7bc11ec125d62"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"abKengGvroPKd2dmz2nFsnM0Q4rnxPOi/PvcDk4ULnKCPNi4hF5T7VprM84e6m9x9ho4b4EkiW/sVklo3jaEBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T17:52:52.745668Z","bundle_sha256":"6108e090865f88ec698a12ea4d9aa10dfd2c2a28536855ec83c76bc13fa39e4b"}}