{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:44MELFUNJWZHEVB3RDWIU6PMBF","short_pith_number":"pith:44MELFUN","canonical_record":{"source":{"id":"2504.11731","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-04-16T03:10:54Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"68a980a6137bdd40a95f8d1845274d8dab19e6c47d93eaeded398d7ee5798901","abstract_canon_sha256":"e653e057e3c6fc85f9076ebd6ea9a211e68d2e78dea329f3ba2d340c6185eb5d"},"schema_version":"1.0"},"canonical_sha256":"e71845968d4db272543b88ec8a79ec094557340a57fda61e9363bd493ddb04cc","source":{"kind":"arxiv","id":"2504.11731","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.11731","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"arxiv_version","alias_value":"2504.11731v1","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.11731","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"pith_short_12","alias_value":"44MELFUNJWZH","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"pith_short_16","alias_value":"44MELFUNJWZHEVB3","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"pith_short_8","alias_value":"44MELFUN","created_at":"2026-07-05T10:49:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:44MELFUNJWZHEVB3RDWIU6PMBF","target":"record","payload":{"canonical_record":{"source":{"id":"2504.11731","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-04-16T03:10:54Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"68a980a6137bdd40a95f8d1845274d8dab19e6c47d93eaeded398d7ee5798901","abstract_canon_sha256":"e653e057e3c6fc85f9076ebd6ea9a211e68d2e78dea329f3ba2d340c6185eb5d"},"schema_version":"1.0"},"canonical_sha256":"e71845968d4db272543b88ec8a79ec094557340a57fda61e9363bd493ddb04cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:49:56.568894Z","signature_b64":"rqjrVjGVcikFRrjOhBKmT8CPO5OTwFrmHtA/kGzBIGwjzPPA/cNNoDDy/oKLTIzPWYaz176oga5u5x6ilT2oAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e71845968d4db272543b88ec8a79ec094557340a57fda61e9363bd493ddb04cc","last_reissued_at":"2026-07-05T10:49:56.568447Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:49:56.568447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.11731","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":"2026-07-05T10:49:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QRzd1pWESMo3RJv8zCJ26Wev0YzZHK7FkvpXtj3055lp3PzJPUCT5Pcip1T/5PX3yl9tm7JOsrXHQkxBsCu8BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T02:25:53.936197Z"},"content_sha256":"be06c90ec0d861cab445eb7cff67d8e2aad3c52fbb34cc940b4f59945e5bbebd","schema_version":"1.0","event_id":"sha256:be06c90ec0d861cab445eb7cff67d8e2aad3c52fbb34cc940b4f59945e5bbebd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:44MELFUNJWZHEVB3RDWIU6PMBF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bayesian Optimization for Ion Beam Centroid Correction","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.acc-ph","authors_text":"Alexander Katrusiak, Defne Tanyer, Emma Ghelfi, Giordano Kogler Anele, Oliver Kester, Olivier Shelbaya, Rick Baartman, Wojtek Fedorko","submitted_at":"2025-04-16T03:10:54Z","abstract_excerpt":"An activity of the TRIUMF automatic beam tuning program, the Bayesian optimization for Ion Steering, BOIS, method has been developed to perform corrective centroid steering of beams at the TRIUMF ISAC facility. BOIS exclusively controls the steerers for centroid correction after the transverse optics have been set according to theory. The method is fully online, easy to deploy, and has been tested in low energy and postaccelerated beams at ISAC, achieving results comparable to human operators. scaleBOIS and boundBOIS are naive proof of concept solutions to preferably select beam paths with min"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.11731","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/2504.11731/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":"2026-07-05T10:49:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bpHyLmrXhVsM7aGpcROW6Ff2/B1K3PZFAvhH+ARANyrF3GzKYakOdoi0jbvlRQcjtFBPIwd505YuoNGLb1WaDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T02:25:53.937010Z"},"content_sha256":"1370dfdbb9232158a990638d9237b211f7dad601b820e95e8628a17ed4188d16","schema_version":"1.0","event_id":"sha256:1370dfdbb9232158a990638d9237b211f7dad601b820e95e8628a17ed4188d16"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/44MELFUNJWZHEVB3RDWIU6PMBF/bundle.json","state_url":"https://pith.science/pith/44MELFUNJWZHEVB3RDWIU6PMBF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/44MELFUNJWZHEVB3RDWIU6PMBF/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":"2026-08-23T02:25:53Z","links":{"resolver":"https://pith.science/pith/44MELFUNJWZHEVB3RDWIU6PMBF","bundle":"https://pith.science/pith/44MELFUNJWZHEVB3RDWIU6PMBF/bundle.json","state":"https://pith.science/pith/44MELFUNJWZHEVB3RDWIU6PMBF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/44MELFUNJWZHEVB3RDWIU6PMBF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:44MELFUNJWZHEVB3RDWIU6PMBF","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":"e653e057e3c6fc85f9076ebd6ea9a211e68d2e78dea329f3ba2d340c6185eb5d","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-04-16T03:10:54Z","title_canon_sha256":"68a980a6137bdd40a95f8d1845274d8dab19e6c47d93eaeded398d7ee5798901"},"schema_version":"1.0","source":{"id":"2504.11731","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.11731","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"arxiv_version","alias_value":"2504.11731v1","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.11731","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"pith_short_12","alias_value":"44MELFUNJWZH","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"pith_short_16","alias_value":"44MELFUNJWZHEVB3","created_at":"2026-07-05T10:49:56Z"},{"alias_kind":"pith_short_8","alias_value":"44MELFUN","created_at":"2026-07-05T10:49:56Z"}],"graph_snapshots":[{"event_id":"sha256:1370dfdbb9232158a990638d9237b211f7dad601b820e95e8628a17ed4188d16","target":"graph","created_at":"2026-07-05T10:49:56Z","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/2504.11731/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"An activity of the TRIUMF automatic beam tuning program, the Bayesian optimization for Ion Steering, BOIS, method has been developed to perform corrective centroid steering of beams at the TRIUMF ISAC facility. BOIS exclusively controls the steerers for centroid correction after the transverse optics have been set according to theory. The method is fully online, easy to deploy, and has been tested in low energy and postaccelerated beams at ISAC, achieving results comparable to human operators. scaleBOIS and boundBOIS are naive proof of concept solutions to preferably select beam paths with min","authors_text":"Alexander Katrusiak, Defne Tanyer, Emma Ghelfi, Giordano Kogler Anele, Oliver Kester, Olivier Shelbaya, Rick Baartman, Wojtek Fedorko","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-04-16T03:10:54Z","title":"Bayesian Optimization for Ion Beam Centroid Correction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.11731","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:be06c90ec0d861cab445eb7cff67d8e2aad3c52fbb34cc940b4f59945e5bbebd","target":"record","created_at":"2026-07-05T10:49:56Z","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":"e653e057e3c6fc85f9076ebd6ea9a211e68d2e78dea329f3ba2d340c6185eb5d","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2025-04-16T03:10:54Z","title_canon_sha256":"68a980a6137bdd40a95f8d1845274d8dab19e6c47d93eaeded398d7ee5798901"},"schema_version":"1.0","source":{"id":"2504.11731","kind":"arxiv","version":1}},"canonical_sha256":"e71845968d4db272543b88ec8a79ec094557340a57fda61e9363bd493ddb04cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e71845968d4db272543b88ec8a79ec094557340a57fda61e9363bd493ddb04cc","first_computed_at":"2026-07-05T10:49:56.568447Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:49:56.568447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rqjrVjGVcikFRrjOhBKmT8CPO5OTwFrmHtA/kGzBIGwjzPPA/cNNoDDy/oKLTIzPWYaz176oga5u5x6ilT2oAA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:49:56.568894Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.11731","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be06c90ec0d861cab445eb7cff67d8e2aad3c52fbb34cc940b4f59945e5bbebd","sha256:1370dfdbb9232158a990638d9237b211f7dad601b820e95e8628a17ed4188d16"],"state_sha256":"51fb62b33e4db8a14fdedb5838e25b314b0c112fa7c457b8a109bfd5b3878878"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ProIMTL55Ki/N40rIC2wlMSauWmgIUszcTlGS9NNuze/hTCGbl0NXYhgq+i0fezykJRdsvCz0wZu5otDuuM9DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T02:25:53.942792Z","bundle_sha256":"2fe4abb811d4108d347fa1253142635895d42b395b07c0682c09446fe8d44dde"}}