{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FOBRHGIJC7VO3S4KJE5BYIOVZI","short_pith_number":"pith:FOBRHGIJ","canonical_record":{"source":{"id":"1810.06557","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-15T14:40:30Z","cross_cats_sorted":[],"title_canon_sha256":"cb21b41b2f51e576d00ad0eddeb65cf367f1c387e9c8bdd81bece29a306a4464","abstract_canon_sha256":"cf48eaebf3795a31fcf17d3a4cfde853f984d5a1acaad901972de3e4a7ce874b"},"schema_version":"1.0"},"canonical_sha256":"2b8313990917eaedcb8a493a1c21d5ca05237375f77044f854f8d1a5d74fcad6","source":{"kind":"arxiv","id":"1810.06557","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.06557","created_at":"2026-05-17T23:52:40Z"},{"alias_kind":"arxiv_version","alias_value":"1810.06557v2","created_at":"2026-05-17T23:52:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.06557","created_at":"2026-05-17T23:52:40Z"},{"alias_kind":"pith_short_12","alias_value":"FOBRHGIJC7VO","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FOBRHGIJC7VO3S4K","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FOBRHGIJ","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FOBRHGIJC7VO3S4KJE5BYIOVZI","target":"record","payload":{"canonical_record":{"source":{"id":"1810.06557","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-15T14:40:30Z","cross_cats_sorted":[],"title_canon_sha256":"cb21b41b2f51e576d00ad0eddeb65cf367f1c387e9c8bdd81bece29a306a4464","abstract_canon_sha256":"cf48eaebf3795a31fcf17d3a4cfde853f984d5a1acaad901972de3e4a7ce874b"},"schema_version":"1.0"},"canonical_sha256":"2b8313990917eaedcb8a493a1c21d5ca05237375f77044f854f8d1a5d74fcad6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:40.475948Z","signature_b64":"Puy8hgiSvJA1+UWm3e1Mcw31AI7PVY1HtsdHW3OkuhS+lW2sTkAzrQYnYyiWPcjEP11MFUEyQKWZhQ1CoAe3AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b8313990917eaedcb8a493a1c21d5ca05237375f77044f854f8d1a5d74fcad6","last_reissued_at":"2026-05-17T23:52:40.475343Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:40.475343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.06557","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":"2026-05-17T23:52:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cX8lu25yh6Ny7ueSLW9oHKV0uYrkfMKPCS5AMCIgtCs4HEX3OsRaR8W5ZCxv09uIk/X9YmwvOyPE/Ib84kKrAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:16:35.171652Z"},"content_sha256":"bb0dd3f05b242de4eb17aeadbf133f704e25b8d162f4c03ceba2b4f53d518729","schema_version":"1.0","event_id":"sha256:bb0dd3f05b242de4eb17aeadbf133f704e25b8d162f4c03ceba2b4f53d518729"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FOBRHGIJC7VO3S4KJE5BYIOVZI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Accelerator Design for the CHESS-U Upgrade","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"A. Lyndaker, A. Temnykh, D.L. Rubin, D. Rice, G. Codner, J. Barley, J. Shanks, M. Billing, N. Rider, S. Barrett, S.T. Wang, X. Liu, Y. Li","submitted_at":"2018-10-15T14:40:30Z","abstract_excerpt":"During the summer and fall of 2018 the Cornell High Energy Synchrotron Source (CHESS) is undergoing an upgrade to increase high-energy flux for x-ray users. The upgrade requires replacing one-sixth of the Cornell Electron Storage Ring (CESR), inverting the polarity of half of the CHESS beam lines, and switching to single-beam on-axis operation. The new sextant is comprised of six double-bend achromats (DBAs) with combined-function dipole-quadrupoles. Although the DBA design is widely utilized and well understood, the constraints for the CESR modifications make the CHESS-U lattice unique. This "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.06557","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":"2026-05-17T23:52:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zo0qZmxUbpKgs5Klp0JcatvUyJ9gIHLdCv3m3B/p+tG7XAr7okt5Nw268OhtdbBWev6MO/IgUcyLN79GU8AvCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:16:35.172301Z"},"content_sha256":"006707b12a12d0bc2fce62f6c7f4bfff6b715b3d4100da9fb5ab6acea11a9241","schema_version":"1.0","event_id":"sha256:006707b12a12d0bc2fce62f6c7f4bfff6b715b3d4100da9fb5ab6acea11a9241"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI/bundle.json","state_url":"https://pith.science/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI/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":"2026-05-28T21:16:35Z","links":{"resolver":"https://pith.science/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI","bundle":"https://pith.science/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI/bundle.json","state":"https://pith.science/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FOBRHGIJC7VO3S4KJE5BYIOVZI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FOBRHGIJC7VO3S4KJE5BYIOVZI","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":"cf48eaebf3795a31fcf17d3a4cfde853f984d5a1acaad901972de3e4a7ce874b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-15T14:40:30Z","title_canon_sha256":"cb21b41b2f51e576d00ad0eddeb65cf367f1c387e9c8bdd81bece29a306a4464"},"schema_version":"1.0","source":{"id":"1810.06557","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.06557","created_at":"2026-05-17T23:52:40Z"},{"alias_kind":"arxiv_version","alias_value":"1810.06557v2","created_at":"2026-05-17T23:52:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.06557","created_at":"2026-05-17T23:52:40Z"},{"alias_kind":"pith_short_12","alias_value":"FOBRHGIJC7VO","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FOBRHGIJC7VO3S4K","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FOBRHGIJ","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:006707b12a12d0bc2fce62f6c7f4bfff6b715b3d4100da9fb5ab6acea11a9241","target":"graph","created_at":"2026-05-17T23:52:40Z","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":"During the summer and fall of 2018 the Cornell High Energy Synchrotron Source (CHESS) is undergoing an upgrade to increase high-energy flux for x-ray users. The upgrade requires replacing one-sixth of the Cornell Electron Storage Ring (CESR), inverting the polarity of half of the CHESS beam lines, and switching to single-beam on-axis operation. The new sextant is comprised of six double-bend achromats (DBAs) with combined-function dipole-quadrupoles. Although the DBA design is widely utilized and well understood, the constraints for the CESR modifications make the CHESS-U lattice unique. This ","authors_text":"A. Lyndaker, A. Temnykh, D.L. Rubin, D. Rice, G. Codner, J. Barley, J. Shanks, M. Billing, N. Rider, S. Barrett, S.T. Wang, X. Liu, Y. Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-15T14:40:30Z","title":"Accelerator Design for the CHESS-U Upgrade"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.06557","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:bb0dd3f05b242de4eb17aeadbf133f704e25b8d162f4c03ceba2b4f53d518729","target":"record","created_at":"2026-05-17T23:52:40Z","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":"cf48eaebf3795a31fcf17d3a4cfde853f984d5a1acaad901972de3e4a7ce874b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2018-10-15T14:40:30Z","title_canon_sha256":"cb21b41b2f51e576d00ad0eddeb65cf367f1c387e9c8bdd81bece29a306a4464"},"schema_version":"1.0","source":{"id":"1810.06557","kind":"arxiv","version":2}},"canonical_sha256":"2b8313990917eaedcb8a493a1c21d5ca05237375f77044f854f8d1a5d74fcad6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b8313990917eaedcb8a493a1c21d5ca05237375f77044f854f8d1a5d74fcad6","first_computed_at":"2026-05-17T23:52:40.475343Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:40.475343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Puy8hgiSvJA1+UWm3e1Mcw31AI7PVY1HtsdHW3OkuhS+lW2sTkAzrQYnYyiWPcjEP11MFUEyQKWZhQ1CoAe3AA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:40.475948Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.06557","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb0dd3f05b242de4eb17aeadbf133f704e25b8d162f4c03ceba2b4f53d518729","sha256:006707b12a12d0bc2fce62f6c7f4bfff6b715b3d4100da9fb5ab6acea11a9241"],"state_sha256":"6301ef03c2ed28f74709177c9b553d596c9ccbc24f7e7fb8cb799540daf9a685"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gGxcbmpDNimpio1x/Sk2FgVJ7CnCbplZhxH41X6xcCuzXgPej0GkjO3B1cyzz+ORTxKGR+OizYruZCsEv3/IDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:16:35.175569Z","bundle_sha256":"128efde0d26c27cac3906fb62a8a5575379e4645f65550cda8dc33f9b9adf8f2"}}