{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4BOF6HJW5Q2QFFALCLXTJVBLVE","short_pith_number":"pith:4BOF6HJW","canonical_record":{"source":{"id":"2112.07560","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2021-12-14T17:08:51Z","cross_cats_sorted":[],"title_canon_sha256":"5a52fdbd1f9de61ed2f3ed7de29070c5cf5dc4ed759517a508286492915f122d","abstract_canon_sha256":"36fd31e496c26c020edba52b56c4738f4c7a2ad77e30bbd655dddc740b7bc0bf"},"schema_version":"1.0"},"canonical_sha256":"e05c5f1d36ec3502940b12ef34d42ba90b1dbbb9e6409486392291e2b0411ea0","source":{"kind":"arxiv","id":"2112.07560","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.07560","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"arxiv_version","alias_value":"2112.07560v1","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.07560","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"pith_short_12","alias_value":"4BOF6HJW5Q2Q","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"pith_short_16","alias_value":"4BOF6HJW5Q2QFFAL","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"pith_short_8","alias_value":"4BOF6HJW","created_at":"2026-07-05T04:31:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4BOF6HJW5Q2QFFALCLXTJVBLVE","target":"record","payload":{"canonical_record":{"source":{"id":"2112.07560","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2021-12-14T17:08:51Z","cross_cats_sorted":[],"title_canon_sha256":"5a52fdbd1f9de61ed2f3ed7de29070c5cf5dc4ed759517a508286492915f122d","abstract_canon_sha256":"36fd31e496c26c020edba52b56c4738f4c7a2ad77e30bbd655dddc740b7bc0bf"},"schema_version":"1.0"},"canonical_sha256":"e05c5f1d36ec3502940b12ef34d42ba90b1dbbb9e6409486392291e2b0411ea0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:31:29.098783Z","signature_b64":"yhnshL44ZPWib76KdwNc4yu70JEOyfzBeKsXPS7dSPQciooqyl19u0GWVbYhj8vDwXL9KJE1M0qmfxOCEnZSAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e05c5f1d36ec3502940b12ef34d42ba90b1dbbb9e6409486392291e2b0411ea0","last_reissued_at":"2026-07-05T04:31:29.098264Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:31:29.098264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.07560","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:31:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RMWcbPQGp/SelKMWaYe2cftjuCaxZNCjhgzN5+Q0Zk73m56YNwtc2KxPZSTUcbLdHEoXqVs90rJxOSZTRATLAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:36:27.066278Z"},"content_sha256":"e3edf17b23ce0fbd92071f50d3c24474797a4dd65eb4da015e363ce700998a55","schema_version":"1.0","event_id":"sha256:e3edf17b23ce0fbd92071f50d3c24474797a4dd65eb4da015e363ce700998a55"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4BOF6HJW5Q2QFFALCLXTJVBLVE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic Measurements of HL-LHC AUP Cryo-Assemblies at Fermilab","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"D. Assell, D. Walbridge, G. Ambrosio, G. Chlachidze, J. DiMarco, J. Nogiec, M. Baldini, M. Tartaglia, P. Akella, P. Thompson, S. Feher, S. Stoynev, T. Strauss, V. Nikolic, W. Ghiorso, X. Wang","submitted_at":"2021-12-14T17:08:51Z","abstract_excerpt":"LQXFA/B production series cryogenic assemblies are being built for the LHC upgrade by the HL-LHC Accelerator Upgrade Project (AUP). These contain a pair of MQXFA quadrupole magnets combined as a cold mass within a vacuum vessel, and are to be installed in the IR regions of the LHC. The LQXFA/B are being tested at 1.9 K to assess alignment and magnetic performance at Fermilab's horizontal test facility. The ~10 m - long assembly must meet stringent specifications for quadrupole strength and harmonic field integrals determination, magnetic axis location, and for variations in axis position and l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.07560","kind":"arxiv","version":1},"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/2112.07560/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":"2026-07-05T04:31:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"50U5KAlG8TkDV0DI6TzHxTrpCnuCBKUxJk/GsqjmjYquYCwQxwn9N2E5TAAeRu9sAoH9coWYxxJcqGIKZEeqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:36:27.066668Z"},"content_sha256":"09aeeaabcc7a8c989bcaaa40d217245d2c7d08c89bd8c7010ab33261318ae837","schema_version":"1.0","event_id":"sha256:09aeeaabcc7a8c989bcaaa40d217245d2c7d08c89bd8c7010ab33261318ae837"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE/bundle.json","state_url":"https://pith.science/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE/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":"2026-07-07T12:36:27Z","links":{"resolver":"https://pith.science/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE","bundle":"https://pith.science/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE/bundle.json","state":"https://pith.science/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4BOF6HJW5Q2QFFALCLXTJVBLVE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4BOF6HJW5Q2QFFALCLXTJVBLVE","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":"36fd31e496c26c020edba52b56c4738f4c7a2ad77e30bbd655dddc740b7bc0bf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2021-12-14T17:08:51Z","title_canon_sha256":"5a52fdbd1f9de61ed2f3ed7de29070c5cf5dc4ed759517a508286492915f122d"},"schema_version":"1.0","source":{"id":"2112.07560","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.07560","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"arxiv_version","alias_value":"2112.07560v1","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.07560","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"pith_short_12","alias_value":"4BOF6HJW5Q2Q","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"pith_short_16","alias_value":"4BOF6HJW5Q2QFFAL","created_at":"2026-07-05T04:31:29Z"},{"alias_kind":"pith_short_8","alias_value":"4BOF6HJW","created_at":"2026-07-05T04:31:29Z"}],"graph_snapshots":[{"event_id":"sha256:09aeeaabcc7a8c989bcaaa40d217245d2c7d08c89bd8c7010ab33261318ae837","target":"graph","created_at":"2026-07-05T04:31:29Z","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/2112.07560/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"LQXFA/B production series cryogenic assemblies are being built for the LHC upgrade by the HL-LHC Accelerator Upgrade Project (AUP). These contain a pair of MQXFA quadrupole magnets combined as a cold mass within a vacuum vessel, and are to be installed in the IR regions of the LHC. The LQXFA/B are being tested at 1.9 K to assess alignment and magnetic performance at Fermilab's horizontal test facility. The ~10 m - long assembly must meet stringent specifications for quadrupole strength and harmonic field integrals determination, magnetic axis location, and for variations in axis position and l","authors_text":"D. Assell, D. Walbridge, G. Ambrosio, G. Chlachidze, J. DiMarco, J. Nogiec, M. Baldini, M. Tartaglia, P. Akella, P. Thompson, S. Feher, S. Stoynev, T. Strauss, V. Nikolic, W. Ghiorso, X. Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2021-12-14T17:08:51Z","title":"Magnetic Measurements of HL-LHC AUP Cryo-Assemblies at Fermilab"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.07560","kind":"arxiv","version":1},"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:e3edf17b23ce0fbd92071f50d3c24474797a4dd65eb4da015e363ce700998a55","target":"record","created_at":"2026-07-05T04:31:29Z","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":"36fd31e496c26c020edba52b56c4738f4c7a2ad77e30bbd655dddc740b7bc0bf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2021-12-14T17:08:51Z","title_canon_sha256":"5a52fdbd1f9de61ed2f3ed7de29070c5cf5dc4ed759517a508286492915f122d"},"schema_version":"1.0","source":{"id":"2112.07560","kind":"arxiv","version":1}},"canonical_sha256":"e05c5f1d36ec3502940b12ef34d42ba90b1dbbb9e6409486392291e2b0411ea0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e05c5f1d36ec3502940b12ef34d42ba90b1dbbb9e6409486392291e2b0411ea0","first_computed_at":"2026-07-05T04:31:29.098264Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:31:29.098264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yhnshL44ZPWib76KdwNc4yu70JEOyfzBeKsXPS7dSPQciooqyl19u0GWVbYhj8vDwXL9KJE1M0qmfxOCEnZSAw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:31:29.098783Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.07560","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3edf17b23ce0fbd92071f50d3c24474797a4dd65eb4da015e363ce700998a55","sha256:09aeeaabcc7a8c989bcaaa40d217245d2c7d08c89bd8c7010ab33261318ae837"],"state_sha256":"b1c5f66ff9426a1968ffe413cd180d0b80e8e2042e6964c0c12ef46dabfcbaf4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2EeWQ9AuRYR9B+gT0AmqlemGkurfzGQkfNC2yO2PLFj3Xnk59hkKQwY4ebLH5ngZ2lgLMOCTQM95mhS1VtsbCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T12:36:27.068877Z","bundle_sha256":"1a36055710e9ee0a066dd0fd9b8ce397d7b399ed81f3c7642aaf89ab1c4b5270"}}