{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:UINEIBOPXM22MK7HWFDJJHKKJX","short_pith_number":"pith:UINEIBOP","canonical_record":{"source":{"id":"1601.05258","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-01-20T12:56:33Z","cross_cats_sorted":[],"title_canon_sha256":"013a6a941f369f92ea956c4d07cd2c813a087898ac7a9c772e876b465e1b5b99","abstract_canon_sha256":"d2951244546e9b9b2f66dcf468f8f8dcc6d2870d704e8c478563b91689a40a30"},"schema_version":"1.0"},"canonical_sha256":"a21a4405cfbb35a62be7b146949d4a4dc493a59ad836af49ab61a7247037971c","source":{"kind":"arxiv","id":"1601.05258","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.05258","created_at":"2026-05-18T01:22:15Z"},{"alias_kind":"arxiv_version","alias_value":"1601.05258v1","created_at":"2026-05-18T01:22:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.05258","created_at":"2026-05-18T01:22:15Z"},{"alias_kind":"pith_short_12","alias_value":"UINEIBOPXM22","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UINEIBOPXM22MK7H","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UINEIBOP","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:UINEIBOPXM22MK7HWFDJJHKKJX","target":"record","payload":{"canonical_record":{"source":{"id":"1601.05258","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-01-20T12:56:33Z","cross_cats_sorted":[],"title_canon_sha256":"013a6a941f369f92ea956c4d07cd2c813a087898ac7a9c772e876b465e1b5b99","abstract_canon_sha256":"d2951244546e9b9b2f66dcf468f8f8dcc6d2870d704e8c478563b91689a40a30"},"schema_version":"1.0"},"canonical_sha256":"a21a4405cfbb35a62be7b146949d4a4dc493a59ad836af49ab61a7247037971c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:15.644210Z","signature_b64":"3A9XK2NlxGzaKovxsqI9sbsUX9Xm9DAVOnsKw7VOqGN/zuzZrCa4HZA740CRu6gWXbKCYTZ9LMIxR6gAdld3DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a21a4405cfbb35a62be7b146949d4a4dc493a59ad836af49ab61a7247037971c","last_reissued_at":"2026-05-18T01:22:15.643475Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:15.643475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.05258","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":"2026-05-18T01:22:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UdTv6gTGDrq9NAfNjr27tYEWFL4ktGvbGdhqcskzuc4NIywcmdkybDqt7Kp7iYp2HLATihTUsOSytOLxMjolDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:47:10.656873Z"},"content_sha256":"edcfcd7db06604ddf2931c9529449b7c0469accb94fad98c87f6f51f62466f46","schema_version":"1.0","event_id":"sha256:edcfcd7db06604ddf2931c9529449b7c0469accb94fad98c87f6f51f62466f46"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:UINEIBOPXM22MK7HWFDJJHKKJX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multi-bunch Feedback Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"H. Schmickler (Sincrotrone Trieste), M. Lonza (Sincrotrone Trieste)","submitted_at":"2016-01-20T12:56:33Z","abstract_excerpt":"Coupled-bunch instabilities excited by the interaction of the particle beam with its surroundings can seriously limit the performance of circular particle accelerators. These instabilities can be cured by the use of active feedback systems based on sensors capable of detecting the unwanted beam motion and actuators that apply the feedback correction to the beam. Advances in electronic technology now allow the implementation of feedback loops using programmable digital systems. Besides important advantages in terms of flexibility and reproducibility, digital systems open the way to the use of n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.05258","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":""},"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":"2026-05-18T01:22:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LkjONEz0/qp76NoAjXkfEtmnHiiHnSDqerCRlElSoim1STseIRwuUDH7Ams9RReA6F0m92/babopSb/MfPwTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:47:10.657561Z"},"content_sha256":"9fb692581c55b51c0dc8e30e73c443d12b8e8dbdafa9f15b7554a1fae732c435","schema_version":"1.0","event_id":"sha256:9fb692581c55b51c0dc8e30e73c443d12b8e8dbdafa9f15b7554a1fae732c435"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UINEIBOPXM22MK7HWFDJJHKKJX/bundle.json","state_url":"https://pith.science/pith/UINEIBOPXM22MK7HWFDJJHKKJX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UINEIBOPXM22MK7HWFDJJHKKJX/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":"2026-05-25T13:47:10Z","links":{"resolver":"https://pith.science/pith/UINEIBOPXM22MK7HWFDJJHKKJX","bundle":"https://pith.science/pith/UINEIBOPXM22MK7HWFDJJHKKJX/bundle.json","state":"https://pith.science/pith/UINEIBOPXM22MK7HWFDJJHKKJX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UINEIBOPXM22MK7HWFDJJHKKJX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:UINEIBOPXM22MK7HWFDJJHKKJX","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":"d2951244546e9b9b2f66dcf468f8f8dcc6d2870d704e8c478563b91689a40a30","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-01-20T12:56:33Z","title_canon_sha256":"013a6a941f369f92ea956c4d07cd2c813a087898ac7a9c772e876b465e1b5b99"},"schema_version":"1.0","source":{"id":"1601.05258","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.05258","created_at":"2026-05-18T01:22:15Z"},{"alias_kind":"arxiv_version","alias_value":"1601.05258v1","created_at":"2026-05-18T01:22:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.05258","created_at":"2026-05-18T01:22:15Z"},{"alias_kind":"pith_short_12","alias_value":"UINEIBOPXM22","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UINEIBOPXM22MK7H","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UINEIBOP","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:9fb692581c55b51c0dc8e30e73c443d12b8e8dbdafa9f15b7554a1fae732c435","target":"graph","created_at":"2026-05-18T01:22:15Z","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":"Coupled-bunch instabilities excited by the interaction of the particle beam with its surroundings can seriously limit the performance of circular particle accelerators. These instabilities can be cured by the use of active feedback systems based on sensors capable of detecting the unwanted beam motion and actuators that apply the feedback correction to the beam. Advances in electronic technology now allow the implementation of feedback loops using programmable digital systems. Besides important advantages in terms of flexibility and reproducibility, digital systems open the way to the use of n","authors_text":"H. Schmickler (Sincrotrone Trieste), M. Lonza (Sincrotrone Trieste)","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-01-20T12:56:33Z","title":"Multi-bunch Feedback Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.05258","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:edcfcd7db06604ddf2931c9529449b7c0469accb94fad98c87f6f51f62466f46","target":"record","created_at":"2026-05-18T01:22:15Z","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":"d2951244546e9b9b2f66dcf468f8f8dcc6d2870d704e8c478563b91689a40a30","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2016-01-20T12:56:33Z","title_canon_sha256":"013a6a941f369f92ea956c4d07cd2c813a087898ac7a9c772e876b465e1b5b99"},"schema_version":"1.0","source":{"id":"1601.05258","kind":"arxiv","version":1}},"canonical_sha256":"a21a4405cfbb35a62be7b146949d4a4dc493a59ad836af49ab61a7247037971c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a21a4405cfbb35a62be7b146949d4a4dc493a59ad836af49ab61a7247037971c","first_computed_at":"2026-05-18T01:22:15.643475Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:15.643475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3A9XK2NlxGzaKovxsqI9sbsUX9Xm9DAVOnsKw7VOqGN/zuzZrCa4HZA740CRu6gWXbKCYTZ9LMIxR6gAdld3DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:15.644210Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.05258","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edcfcd7db06604ddf2931c9529449b7c0469accb94fad98c87f6f51f62466f46","sha256:9fb692581c55b51c0dc8e30e73c443d12b8e8dbdafa9f15b7554a1fae732c435"],"state_sha256":"815702cadbca22f3c91b72c9928aa2feb67ddb0552feb7dd0bb3685d9402dcad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fJWV+iXgDGa2d+zUJ12mvV40IsOb3t1JIV0+oiiS1vCRisfTasw3JKByKPifhrufsSduAhTHWICmuZO+7cWzCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:47:10.661005Z","bundle_sha256":"66b1fb0fb6c95133bfb243c6130110e345a624e4130c7b8451530816155927ef"}}