{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:6EW3M46YHVVE5CQGFO6Q3PPQHL","short_pith_number":"pith:6EW3M46Y","canonical_record":{"source":{"id":"2502.15847","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-02-20T23:06:41Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"9eec6d40d7c89fd8fef4ce63b8cf37bd69f3a408fd5f2131cfed0c4f6d29129f","abstract_canon_sha256":"16663f7f27ed1770c505f73ba747bbd8ba3894e4888f2f61edf07162b0255300"},"schema_version":"1.0"},"canonical_sha256":"f12db673d83d6a4e8a062bbd0dbdf03af1d174f63de529662e1a909f0c57c17d","source":{"kind":"arxiv","id":"2502.15847","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.15847","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"arxiv_version","alias_value":"2502.15847v4","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.15847","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"pith_short_12","alias_value":"6EW3M46YHVVE","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"pith_short_16","alias_value":"6EW3M46YHVVE5CQG","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"pith_short_8","alias_value":"6EW3M46Y","created_at":"2026-06-02T01:03:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:6EW3M46YHVVE5CQGFO6Q3PPQHL","target":"record","payload":{"canonical_record":{"source":{"id":"2502.15847","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-02-20T23:06:41Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"9eec6d40d7c89fd8fef4ce63b8cf37bd69f3a408fd5f2131cfed0c4f6d29129f","abstract_canon_sha256":"16663f7f27ed1770c505f73ba747bbd8ba3894e4888f2f61edf07162b0255300"},"schema_version":"1.0"},"canonical_sha256":"f12db673d83d6a4e8a062bbd0dbdf03af1d174f63de529662e1a909f0c57c17d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-02T01:03:30.589679Z","signature_b64":"f2mhN62IseOThZYMTZhPpSetx9p6nBX+wMR/6zXtpLgn/Kf+2fvi/mhfaQzNWledmB1q3Ly/K1y2/ruXQ1CCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f12db673d83d6a4e8a062bbd0dbdf03af1d174f63de529662e1a909f0c57c17d","last_reissued_at":"2026-06-02T01:03:30.589145Z","signature_status":"signed_v1","first_computed_at":"2026-06-02T01:03:30.589145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.15847","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-02T01:03:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wPbpQ/xG0xp3xLgSxMREfBz7BDUDKAo+phLyNGlFpTeakMoN0vr7FN8DrRIDQpzb0kANsUxtjciIU6Ab9mCXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T11:21:11.390215Z"},"content_sha256":"8e13b142b7c535c11f441e131f75783278855f1da7a669b5520cb38af9f8d081","schema_version":"1.0","event_id":"sha256:8e13b142b7c535c11f441e131f75783278855f1da7a669b5520cb38af9f8d081"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:6EW3M46YHVVE5CQGFO6Q3PPQHL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving Optics Control and Measurement at RHIC","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.acc-ph","authors_text":"G. Robert-Demolaize, W. Fung, X. Gu, Y. Hao","submitted_at":"2025-02-20T23:06:41Z","abstract_excerpt":"Maximizing luminosity requires precise control of the optics function at the interaction point (IP), implying that the location ($s^*$) of the beta function's minimum value ($\\beta^*$) must be moved to the collision location ($s_{IP}$) as much as possible. Accurate optics measurements and reliable control of $s^*$ in both planes are therefore essential for optimal collider performance. During Relativistic Heavy Ion Collider (RHIC) operations in 2024, measurements indicate an average horizontal beta beat of approximately $20\\%$ at IP8, accompanied by measurement variation in measured $s^*$ in b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.15847","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2502.15847/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-06-02T01:03:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XsKVYhaOfy8fDlSxJLYORMLa/z2u/qtODwx5tnNurMdLJnhaskqsNy53NADbLcfUU223yk4R3eWkbf+rSFBaAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T11:21:11.391070Z"},"content_sha256":"28ea26356fd0c3160bc54cfac625b4ee5183f344f77cdfd4a7d9ed22454ac858","schema_version":"1.0","event_id":"sha256:28ea26356fd0c3160bc54cfac625b4ee5183f344f77cdfd4a7d9ed22454ac858"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL/bundle.json","state_url":"https://pith.science/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL/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":"2026-06-10T11:21:11Z","links":{"resolver":"https://pith.science/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL","bundle":"https://pith.science/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL/bundle.json","state":"https://pith.science/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6EW3M46YHVVE5CQGFO6Q3PPQHL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:6EW3M46YHVVE5CQGFO6Q3PPQHL","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":"16663f7f27ed1770c505f73ba747bbd8ba3894e4888f2f61edf07162b0255300","cross_cats_sorted":["nucl-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-02-20T23:06:41Z","title_canon_sha256":"9eec6d40d7c89fd8fef4ce63b8cf37bd69f3a408fd5f2131cfed0c4f6d29129f"},"schema_version":"1.0","source":{"id":"2502.15847","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.15847","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"arxiv_version","alias_value":"2502.15847v4","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.15847","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"pith_short_12","alias_value":"6EW3M46YHVVE","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"pith_short_16","alias_value":"6EW3M46YHVVE5CQG","created_at":"2026-06-02T01:03:30Z"},{"alias_kind":"pith_short_8","alias_value":"6EW3M46Y","created_at":"2026-06-02T01:03:30Z"}],"graph_snapshots":[{"event_id":"sha256:28ea26356fd0c3160bc54cfac625b4ee5183f344f77cdfd4a7d9ed22454ac858","target":"graph","created_at":"2026-06-02T01:03:30Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2502.15847/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Maximizing luminosity requires precise control of the optics function at the interaction point (IP), implying that the location ($s^*$) of the beta function's minimum value ($\\beta^*$) must be moved to the collision location ($s_{IP}$) as much as possible. Accurate optics measurements and reliable control of $s^*$ in both planes are therefore essential for optimal collider performance. During Relativistic Heavy Ion Collider (RHIC) operations in 2024, measurements indicate an average horizontal beta beat of approximately $20\\%$ at IP8, accompanied by measurement variation in measured $s^*$ in b","authors_text":"G. Robert-Demolaize, W. Fung, X. Gu, Y. Hao","cross_cats":["nucl-ex"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-02-20T23:06:41Z","title":"Improving Optics Control and Measurement at RHIC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.15847","kind":"arxiv","version":4},"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":"sha256:8e13b142b7c535c11f441e131f75783278855f1da7a669b5520cb38af9f8d081","target":"record","created_at":"2026-06-02T01:03:30Z","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":"16663f7f27ed1770c505f73ba747bbd8ba3894e4888f2f61edf07162b0255300","cross_cats_sorted":["nucl-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-02-20T23:06:41Z","title_canon_sha256":"9eec6d40d7c89fd8fef4ce63b8cf37bd69f3a408fd5f2131cfed0c4f6d29129f"},"schema_version":"1.0","source":{"id":"2502.15847","kind":"arxiv","version":4}},"canonical_sha256":"f12db673d83d6a4e8a062bbd0dbdf03af1d174f63de529662e1a909f0c57c17d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f12db673d83d6a4e8a062bbd0dbdf03af1d174f63de529662e1a909f0c57c17d","first_computed_at":"2026-06-02T01:03:30.589145Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T01:03:30.589145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f2mhN62IseOThZYMTZhPpSetx9p6nBX+wMR/6zXtpLgn/Kf+2fvi/mhfaQzNWledmB1q3Ly/K1y2/ruXQ1CCDQ==","signature_status":"signed_v1","signed_at":"2026-06-02T01:03:30.589679Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.15847","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e13b142b7c535c11f441e131f75783278855f1da7a669b5520cb38af9f8d081","sha256:28ea26356fd0c3160bc54cfac625b4ee5183f344f77cdfd4a7d9ed22454ac858"],"state_sha256":"95929ccc9ddd6f0a7f1532723a1b03f8e7427913a7927c61a9b6febc8d304754"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XjauV4mb6YW19gvmQjc4MSkJzyeWwzIHhlLZE7+hwK7Zxk9FOJ0vE1P/XI4iLn+Lku8j/NlbYeXB4rl3mTsYCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T11:21:11.395414Z","bundle_sha256":"582ddd5559a12a5844f233e51eabe37d3edc7b5ff09658c43ca3ed2a6bbd71ab"}}