{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:75EO6LWNSV3CU4AK5YQQJ6RZUT","short_pith_number":"pith:75EO6LWN","canonical_record":{"source":{"id":"1201.4168","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2012-01-19T20:51:23Z","cross_cats_sorted":[],"title_canon_sha256":"c860e4e87a545833307659e7b19123dce38947c0144831e204b00a8ed00fc6ea","abstract_canon_sha256":"ea3cdf8ab64acd81b2a4e09efd5462ffc2df4c52b4adc485bd3ceb7b8ccc6fb3"},"schema_version":"1.0"},"canonical_sha256":"ff48ef2ecd95762a700aee2104fa39a4ff2a95bc96ccc5798c9e143de53adc60","source":{"kind":"arxiv","id":"1201.4168","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4168","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4168v1","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4168","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"pith_short_12","alias_value":"75EO6LWNSV3C","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"75EO6LWNSV3CU4AK","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"75EO6LWN","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:75EO6LWNSV3CU4AK5YQQJ6RZUT","target":"record","payload":{"canonical_record":{"source":{"id":"1201.4168","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2012-01-19T20:51:23Z","cross_cats_sorted":[],"title_canon_sha256":"c860e4e87a545833307659e7b19123dce38947c0144831e204b00a8ed00fc6ea","abstract_canon_sha256":"ea3cdf8ab64acd81b2a4e09efd5462ffc2df4c52b4adc485bd3ceb7b8ccc6fb3"},"schema_version":"1.0"},"canonical_sha256":"ff48ef2ecd95762a700aee2104fa39a4ff2a95bc96ccc5798c9e143de53adc60","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:04:15.747178Z","signature_b64":"nR8naEuP2c4fUTq0kjcVxyhEI/jHgt8fMCrkkPYQzv/FfKvbNdwzd2+BsHPVFw2N4lrk3eewK1Og96RQJBhRCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff48ef2ecd95762a700aee2104fa39a4ff2a95bc96ccc5798c9e143de53adc60","last_reissued_at":"2026-05-18T04:04:15.746383Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:04:15.746383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.4168","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":"2026-05-18T04:04:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vuoIBesioqF3Uf3DrB21JRQIJi3sEZBA+HWf4ollvUW2j1o8yxXOGOQ9gnRr97n8E3rigKMOnGd36vjYoNJpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:14:21.272566Z"},"content_sha256":"01f65e6c54f02919f400dcabf1769de05d0356a7a111196eea050d817d5f52fe","schema_version":"1.0","event_id":"sha256:01f65e6c54f02919f400dcabf1769de05d0356a7a111196eea050d817d5f52fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:75EO6LWNSV3CU4AK5YQQJ6RZUT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transverse Instabilities in the FERMILAB Recycler","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.acc-ph","authors_text":"A. Burov, A. Shemyakin, C. M. Bhat, J. Crisp, L. R. Prost, N. Eddy","submitted_at":"2012-01-19T20:51:23Z","abstract_excerpt":"Transverse instabilities of the antiproton beam have been observed in the Recycler ring soon after its commissioning. After installation of transverse dampers, the threshold for the instability limit increased significantly but the instability is still found to limit the brightness of the antiprotons extracted from the Recycler for Tevatron shots. In this paper, we describe observations of the instabilities during the extraction process as well as during dedicated studies. The measured instability threshold phase density agrees with the prediction of the rigid beam model within a factor of 2. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4168","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":"2026-05-18T04:04:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XrYcsb8VlwlwQnrquiRzsBK1qET1hFeZGwABqJBBDLvlR2p/+CzxBdDuAq+M8yma0GP0jfBWYJnQwAvLQU5/CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:14:21.272913Z"},"content_sha256":"8297336ac09d0df3918691e67212dcc00292070f01a464428020d5c40a9c9443","schema_version":"1.0","event_id":"sha256:8297336ac09d0df3918691e67212dcc00292070f01a464428020d5c40a9c9443"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT/bundle.json","state_url":"https://pith.science/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT/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":"2026-05-28T13:14:21Z","links":{"resolver":"https://pith.science/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT","bundle":"https://pith.science/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT/bundle.json","state":"https://pith.science/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/75EO6LWNSV3CU4AK5YQQJ6RZUT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:75EO6LWNSV3CU4AK5YQQJ6RZUT","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":"ea3cdf8ab64acd81b2a4e09efd5462ffc2df4c52b4adc485bd3ceb7b8ccc6fb3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2012-01-19T20:51:23Z","title_canon_sha256":"c860e4e87a545833307659e7b19123dce38947c0144831e204b00a8ed00fc6ea"},"schema_version":"1.0","source":{"id":"1201.4168","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4168","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4168v1","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4168","created_at":"2026-05-18T04:04:15Z"},{"alias_kind":"pith_short_12","alias_value":"75EO6LWNSV3C","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"75EO6LWNSV3CU4AK","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"75EO6LWN","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:8297336ac09d0df3918691e67212dcc00292070f01a464428020d5c40a9c9443","target":"graph","created_at":"2026-05-18T04:04:15Z","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":"Transverse instabilities of the antiproton beam have been observed in the Recycler ring soon after its commissioning. After installation of transverse dampers, the threshold for the instability limit increased significantly but the instability is still found to limit the brightness of the antiprotons extracted from the Recycler for Tevatron shots. In this paper, we describe observations of the instabilities during the extraction process as well as during dedicated studies. The measured instability threshold phase density agrees with the prediction of the rigid beam model within a factor of 2. ","authors_text":"A. Burov, A. Shemyakin, C. M. Bhat, J. Crisp, L. R. Prost, N. Eddy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2012-01-19T20:51:23Z","title":"Transverse Instabilities in the FERMILAB Recycler"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4168","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":"sha256:01f65e6c54f02919f400dcabf1769de05d0356a7a111196eea050d817d5f52fe","target":"record","created_at":"2026-05-18T04:04:15Z","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":"ea3cdf8ab64acd81b2a4e09efd5462ffc2df4c52b4adc485bd3ceb7b8ccc6fb3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2012-01-19T20:51:23Z","title_canon_sha256":"c860e4e87a545833307659e7b19123dce38947c0144831e204b00a8ed00fc6ea"},"schema_version":"1.0","source":{"id":"1201.4168","kind":"arxiv","version":1}},"canonical_sha256":"ff48ef2ecd95762a700aee2104fa39a4ff2a95bc96ccc5798c9e143de53adc60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff48ef2ecd95762a700aee2104fa39a4ff2a95bc96ccc5798c9e143de53adc60","first_computed_at":"2026-05-18T04:04:15.746383Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:15.746383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nR8naEuP2c4fUTq0kjcVxyhEI/jHgt8fMCrkkPYQzv/FfKvbNdwzd2+BsHPVFw2N4lrk3eewK1Og96RQJBhRCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:15.747178Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.4168","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01f65e6c54f02919f400dcabf1769de05d0356a7a111196eea050d817d5f52fe","sha256:8297336ac09d0df3918691e67212dcc00292070f01a464428020d5c40a9c9443"],"state_sha256":"50b66738b266562a80b96026ba0ca28a4c46b9cecbfdf47439356c268f44ed38"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZyROxU6SuFLgZ18CHv3sDxrCx26P/nXnFnTBikEssd0J1o/Q3FwS1TBZ8CmjkNQe5d4n921L9EAN+3AMfSW3Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T13:14:21.274866Z","bundle_sha256":"4242bb0aed5869997a1c02aebf7b6be24c164a5c12178a3462290ffc97b67cca"}}