{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:7OGRV3IGW66XGPATNIGCPXJ7UY","short_pith_number":"pith:7OGRV3IG","canonical_record":{"source":{"id":"0906.0948","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2009-06-04T17:23:42Z","cross_cats_sorted":[],"title_canon_sha256":"212887e4d7b0dcbe6e11b3a9e808b490d8342ca3e9ffe872f1dc2cb7e2447a29","abstract_canon_sha256":"e6d00d7b173ec1b3e51443f7080222c2276ecbc8bc3888cc8ec3b8bda7904c22"},"schema_version":"1.0"},"canonical_sha256":"fb8d1aed06b7bd733c136a0c27dd3fa6050b98ab159a519920644a08db94722c","source":{"kind":"arxiv","id":"0906.0948","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.0948","created_at":"2026-05-18T02:13:28Z"},{"alias_kind":"arxiv_version","alias_value":"0906.0948v2","created_at":"2026-05-18T02:13:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.0948","created_at":"2026-05-18T02:13:28Z"},{"alias_kind":"pith_short_12","alias_value":"7OGRV3IGW66X","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7OGRV3IGW66XGPAT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7OGRV3IG","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:7OGRV3IGW66XGPATNIGCPXJ7UY","target":"record","payload":{"canonical_record":{"source":{"id":"0906.0948","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2009-06-04T17:23:42Z","cross_cats_sorted":[],"title_canon_sha256":"212887e4d7b0dcbe6e11b3a9e808b490d8342ca3e9ffe872f1dc2cb7e2447a29","abstract_canon_sha256":"e6d00d7b173ec1b3e51443f7080222c2276ecbc8bc3888cc8ec3b8bda7904c22"},"schema_version":"1.0"},"canonical_sha256":"fb8d1aed06b7bd733c136a0c27dd3fa6050b98ab159a519920644a08db94722c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:28.969386Z","signature_b64":"VBAmWvxBZYsnIfjGm3ePZY1iSG/gr774QK8M64WbMJvGBrgTQs0qFTtEmVvQ0a2LV3axbjtinrj2DsrUaqxQAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fb8d1aed06b7bd733c136a0c27dd3fa6050b98ab159a519920644a08db94722c","last_reissued_at":"2026-05-18T02:13:28.968730Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:28.968730Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.0948","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":"2026-05-18T02:13:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/gNs2e72hIKC9he7bL/uURuNyS/9SQWCgSUlRn8I3PIWPDIZCU9BBS8C1nIpzwTJnD7EWlUOjbZPxugtrQIQAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T12:35:56.625370Z"},"content_sha256":"7b366543afb6ba2f40a9c74d9b1583da36b4dc8fe75f1d6b3a33a175ee8f5503","schema_version":"1.0","event_id":"sha256:7b366543afb6ba2f40a9c74d9b1583da36b4dc8fe75f1d6b3a33a175ee8f5503"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:7OGRV3IGW66XGPATNIGCPXJ7UY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wake potentials and impedances of charged beams in gradually tapering structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"D.A. Burton, D.C. Christie, J.D.A. Smith, R.W. Tucker","submitted_at":"2009-06-04T17:23:42Z","abstract_excerpt":"An analytical method is developed for calculating the geometric wakefield and impedances of an ultrarelativistic beam propagating on- and off-axis through an axially symmetric geometry with slowly varying circular cross-section, such as a transition. Unlike previous analytical methods, our approach considers a beam of arbitrary longitudinal profile and permits detailed perturbative investigation of impedance as a function of frequency. We compare the accuracy of the results of our approach with numerical simulations performed using the code ECHO and determine parameters in which there is good "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.0948","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":"2026-05-18T02:13:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CQgfT2Y0l6q0lxyMZQP5kRhwelQtwvgl7rA8PRZONb9oaz5YN2BNAXaP3U+Gaxv0NOdwh1GsmqkjPJ99UftUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T12:35:56.625723Z"},"content_sha256":"2b7beddf9055f42e574e540550f22f170535223d814ffe9a2cdcbedfe07651b9","schema_version":"1.0","event_id":"sha256:2b7beddf9055f42e574e540550f22f170535223d814ffe9a2cdcbedfe07651b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7OGRV3IGW66XGPATNIGCPXJ7UY/bundle.json","state_url":"https://pith.science/pith/7OGRV3IGW66XGPATNIGCPXJ7UY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7OGRV3IGW66XGPATNIGCPXJ7UY/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":"2026-06-22T12:35:56Z","links":{"resolver":"https://pith.science/pith/7OGRV3IGW66XGPATNIGCPXJ7UY","bundle":"https://pith.science/pith/7OGRV3IGW66XGPATNIGCPXJ7UY/bundle.json","state":"https://pith.science/pith/7OGRV3IGW66XGPATNIGCPXJ7UY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7OGRV3IGW66XGPATNIGCPXJ7UY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:7OGRV3IGW66XGPATNIGCPXJ7UY","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":"e6d00d7b173ec1b3e51443f7080222c2276ecbc8bc3888cc8ec3b8bda7904c22","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2009-06-04T17:23:42Z","title_canon_sha256":"212887e4d7b0dcbe6e11b3a9e808b490d8342ca3e9ffe872f1dc2cb7e2447a29"},"schema_version":"1.0","source":{"id":"0906.0948","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.0948","created_at":"2026-05-18T02:13:28Z"},{"alias_kind":"arxiv_version","alias_value":"0906.0948v2","created_at":"2026-05-18T02:13:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.0948","created_at":"2026-05-18T02:13:28Z"},{"alias_kind":"pith_short_12","alias_value":"7OGRV3IGW66X","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7OGRV3IGW66XGPAT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7OGRV3IG","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:2b7beddf9055f42e574e540550f22f170535223d814ffe9a2cdcbedfe07651b9","target":"graph","created_at":"2026-05-18T02:13:28Z","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 method is developed for calculating the geometric wakefield and impedances of an ultrarelativistic beam propagating on- and off-axis through an axially symmetric geometry with slowly varying circular cross-section, such as a transition. Unlike previous analytical methods, our approach considers a beam of arbitrary longitudinal profile and permits detailed perturbative investigation of impedance as a function of frequency. We compare the accuracy of the results of our approach with numerical simulations performed using the code ECHO and determine parameters in which there is good ","authors_text":"D.A. Burton, D.C. Christie, J.D.A. Smith, R.W. Tucker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2009-06-04T17:23:42Z","title":"Wake potentials and impedances of charged beams in gradually tapering structures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.0948","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":"sha256:7b366543afb6ba2f40a9c74d9b1583da36b4dc8fe75f1d6b3a33a175ee8f5503","target":"record","created_at":"2026-05-18T02:13:28Z","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":"e6d00d7b173ec1b3e51443f7080222c2276ecbc8bc3888cc8ec3b8bda7904c22","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2009-06-04T17:23:42Z","title_canon_sha256":"212887e4d7b0dcbe6e11b3a9e808b490d8342ca3e9ffe872f1dc2cb7e2447a29"},"schema_version":"1.0","source":{"id":"0906.0948","kind":"arxiv","version":2}},"canonical_sha256":"fb8d1aed06b7bd733c136a0c27dd3fa6050b98ab159a519920644a08db94722c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb8d1aed06b7bd733c136a0c27dd3fa6050b98ab159a519920644a08db94722c","first_computed_at":"2026-05-18T02:13:28.968730Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:28.968730Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VBAmWvxBZYsnIfjGm3ePZY1iSG/gr774QK8M64WbMJvGBrgTQs0qFTtEmVvQ0a2LV3axbjtinrj2DsrUaqxQAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:28.969386Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.0948","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b366543afb6ba2f40a9c74d9b1583da36b4dc8fe75f1d6b3a33a175ee8f5503","sha256:2b7beddf9055f42e574e540550f22f170535223d814ffe9a2cdcbedfe07651b9"],"state_sha256":"b37fd665d642ea4ceef6eb54962fcc90e41458f8cf9f058587b1e93194930224"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6N8pGjmQjdSt4IptaXJw9+uh3n0GdaeKkrWEwbJhq0+S8kjcE9U5rY+YS8YR3cdOxZZLVsAelbVWILHDZipVBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T12:35:56.627685Z","bundle_sha256":"aae2e7b20fbc59ed792cfe4b2c2d491a48cb69586687dfb44094ce4901dbb3b5"}}