{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:HTF3D3ZWWSEHBIY4J5H4N2VXG2","short_pith_number":"pith:HTF3D3ZW","canonical_record":{"source":{"id":"1505.03025","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-12T14:29:29Z","cross_cats_sorted":[],"title_canon_sha256":"b068d50547e5fe29a7a89ecc14de49cf8bc5cfc87d0a65f0c088ad057009983a","abstract_canon_sha256":"6993d81f8641916a835ec33b6aab8c020321b297acbfe6cdbd2cab024ba06687"},"schema_version":"1.0"},"canonical_sha256":"3ccbb1ef36b48870a31c4f4fc6eab736806f5f5677554e2bb189a6909ef7702a","source":{"kind":"arxiv","id":"1505.03025","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03025","created_at":"2026-05-18T01:34:22Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03025v3","created_at":"2026-05-18T01:34:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03025","created_at":"2026-05-18T01:34:22Z"},{"alias_kind":"pith_short_12","alias_value":"HTF3D3ZWWSEH","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HTF3D3ZWWSEHBIY4","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HTF3D3ZW","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:HTF3D3ZWWSEHBIY4J5H4N2VXG2","target":"record","payload":{"canonical_record":{"source":{"id":"1505.03025","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-12T14:29:29Z","cross_cats_sorted":[],"title_canon_sha256":"b068d50547e5fe29a7a89ecc14de49cf8bc5cfc87d0a65f0c088ad057009983a","abstract_canon_sha256":"6993d81f8641916a835ec33b6aab8c020321b297acbfe6cdbd2cab024ba06687"},"schema_version":"1.0"},"canonical_sha256":"3ccbb1ef36b48870a31c4f4fc6eab736806f5f5677554e2bb189a6909ef7702a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:22.910296Z","signature_b64":"Zfj2QkMQ/hn0NgUtg5L8f9uYm2I6jxNXToIuVQeerKATjv+UW/Dtu9uq7j1NIMoJByV1zt83RcpvyBqyccfsAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ccbb1ef36b48870a31c4f4fc6eab736806f5f5677554e2bb189a6909ef7702a","last_reissued_at":"2026-05-18T01:34:22.909758Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:22.909758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.03025","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:34:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JpsnX/ZHJK0NGrI51GIQ8LaJSd8266QhS0vKlqyduahN0nIz04d9I/aX+7khJPKQBDz5AlNqrb/OsTuSbbMZAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T10:21:45.127090Z"},"content_sha256":"58a4408ff595c852a650ca6711e99aea84344a43b26cdc85d506aa5a97246335","schema_version":"1.0","event_id":"sha256:58a4408ff595c852a650ca6711e99aea84344a43b26cdc85d506aa5a97246335"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:HTF3D3ZWWSEHBIY4J5H4N2VXG2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Conversion of CESR to Operate as the Test Accelerator, CesrTA, Part 2: Vacuum Modifications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"M.G. Billing, Y. Li","submitted_at":"2015-05-12T14:29:29Z","abstract_excerpt":"Cornell's electron/positron storage ring (CESR) was modified over a series of accelerator shutdowns beginning in May 2008, which substantially improves its capability for research and development for particle accelerators. CESR's energy span from 1.8 to 5.6 GeV with both electrons and positrons makes it ideal for the study of a wide spectrum of accelerator physics issues and instrumentation related to present light sources and future lepton damping rings. Additionally a number of these are also relevant for the beam physics of proton accelerators. This paper, the second in a series of four, di"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03025","kind":"arxiv","version":3},"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":"2026-05-18T01:34:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HIzZW5/07LoIhTCVKlFM6xdpY7FMtTl3RjmLgtspe3f5G96vkXB6jqkVVfamjsBwHeCMQ/blYl3giwASBrzEBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T10:21:45.127459Z"},"content_sha256":"d32f90fe857bc5bf25e0cc9c4191eda03c27a2cb4a9d9dfd1c64e1dec49f4736","schema_version":"1.0","event_id":"sha256:d32f90fe857bc5bf25e0cc9c4191eda03c27a2cb4a9d9dfd1c64e1dec49f4736"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2/bundle.json","state_url":"https://pith.science/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2/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":"2026-06-02T10:21:45Z","links":{"resolver":"https://pith.science/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2","bundle":"https://pith.science/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2/bundle.json","state":"https://pith.science/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HTF3D3ZWWSEHBIY4J5H4N2VXG2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:HTF3D3ZWWSEHBIY4J5H4N2VXG2","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":"6993d81f8641916a835ec33b6aab8c020321b297acbfe6cdbd2cab024ba06687","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-12T14:29:29Z","title_canon_sha256":"b068d50547e5fe29a7a89ecc14de49cf8bc5cfc87d0a65f0c088ad057009983a"},"schema_version":"1.0","source":{"id":"1505.03025","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03025","created_at":"2026-05-18T01:34:22Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03025v3","created_at":"2026-05-18T01:34:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03025","created_at":"2026-05-18T01:34:22Z"},{"alias_kind":"pith_short_12","alias_value":"HTF3D3ZWWSEH","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HTF3D3ZWWSEHBIY4","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HTF3D3ZW","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:d32f90fe857bc5bf25e0cc9c4191eda03c27a2cb4a9d9dfd1c64e1dec49f4736","target":"graph","created_at":"2026-05-18T01:34:22Z","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":"Cornell's electron/positron storage ring (CESR) was modified over a series of accelerator shutdowns beginning in May 2008, which substantially improves its capability for research and development for particle accelerators. CESR's energy span from 1.8 to 5.6 GeV with both electrons and positrons makes it ideal for the study of a wide spectrum of accelerator physics issues and instrumentation related to present light sources and future lepton damping rings. Additionally a number of these are also relevant for the beam physics of proton accelerators. This paper, the second in a series of four, di","authors_text":"M.G. Billing, Y. Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-12T14:29:29Z","title":"The Conversion of CESR to Operate as the Test Accelerator, CesrTA, Part 2: Vacuum Modifications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03025","kind":"arxiv","version":3},"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":"sha256:58a4408ff595c852a650ca6711e99aea84344a43b26cdc85d506aa5a97246335","target":"record","created_at":"2026-05-18T01:34:22Z","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":"6993d81f8641916a835ec33b6aab8c020321b297acbfe6cdbd2cab024ba06687","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2015-05-12T14:29:29Z","title_canon_sha256":"b068d50547e5fe29a7a89ecc14de49cf8bc5cfc87d0a65f0c088ad057009983a"},"schema_version":"1.0","source":{"id":"1505.03025","kind":"arxiv","version":3}},"canonical_sha256":"3ccbb1ef36b48870a31c4f4fc6eab736806f5f5677554e2bb189a6909ef7702a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ccbb1ef36b48870a31c4f4fc6eab736806f5f5677554e2bb189a6909ef7702a","first_computed_at":"2026-05-18T01:34:22.909758Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:22.909758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zfj2QkMQ/hn0NgUtg5L8f9uYm2I6jxNXToIuVQeerKATjv+UW/Dtu9uq7j1NIMoJByV1zt83RcpvyBqyccfsAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:22.910296Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.03025","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58a4408ff595c852a650ca6711e99aea84344a43b26cdc85d506aa5a97246335","sha256:d32f90fe857bc5bf25e0cc9c4191eda03c27a2cb4a9d9dfd1c64e1dec49f4736"],"state_sha256":"20de65ce572f252b0d65cf428b29d3bce70ae3bfc4570e55bbd6126f9d1da230"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nGmBOUccIhG4gttbjJu2nM0tKIxLZGnNlznJsthQ5mD7TReVITjo+GNRRjo6mn0DvBmH0irTHjSHiK8/530pCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T10:21:45.129545Z","bundle_sha256":"a722b86efdbdfed0c36bf42fef325d656fbc5cf455edb279a3c47c4b0e1b1ad5"}}