{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:VBQGBIJV3QJSCFZFU4GMFDY6HC","short_pith_number":"pith:VBQGBIJV","canonical_record":{"source":{"id":"1510.07203","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-10-25T03:58:38Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"5d047e49526c526015077015fd0067b88dcb5937dbaf28e9df132a05670e5b85","abstract_canon_sha256":"0b7707c5366736041328ba5ac8fb5bc94ea68094c0d1ae941f4d9752cbadd30a"},"schema_version":"1.0"},"canonical_sha256":"a86060a135dc13211725a70cc28f1e38848f56c82bd95ea35059db04ae316f60","source":{"kind":"arxiv","id":"1510.07203","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07203","created_at":"2026-05-18T01:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07203v1","created_at":"2026-05-18T01:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07203","created_at":"2026-05-18T01:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"VBQGBIJV3QJS","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"VBQGBIJV3QJSCFZF","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"VBQGBIJV","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:VBQGBIJV3QJSCFZFU4GMFDY6HC","target":"record","payload":{"canonical_record":{"source":{"id":"1510.07203","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-10-25T03:58:38Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"5d047e49526c526015077015fd0067b88dcb5937dbaf28e9df132a05670e5b85","abstract_canon_sha256":"0b7707c5366736041328ba5ac8fb5bc94ea68094c0d1ae941f4d9752cbadd30a"},"schema_version":"1.0"},"canonical_sha256":"a86060a135dc13211725a70cc28f1e38848f56c82bd95ea35059db04ae316f60","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:01:00.966196Z","signature_b64":"f9MOB+u8CDpleVdKkhxDP63MZ8iug4fA220EticgBxyrxvayCHZD7J2yN7f4/+GUC5mmty1X5SHy5lIqlII5Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a86060a135dc13211725a70cc28f1e38848f56c82bd95ea35059db04ae316f60","last_reissued_at":"2026-05-18T01:01:00.965524Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:01:00.965524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.07203","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":"2026-05-18T01:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eVMs/7TZqt/+/2myyKu2+f7/dsroSeq9U/1ks9zk8Z6CjH9xaLAegWLup8+jMGpJET/eWS11IdALfeIP/k8cAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:10:19.564620Z"},"content_sha256":"74f688da2302683ebca2e3bf458a4fa19934100574a86f7759a55581534de9d2","schema_version":"1.0","event_id":"sha256:74f688da2302683ebca2e3bf458a4fa19934100574a86f7759a55581534de9d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:VBQGBIJV3QJSCFZFU4GMFDY6HC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Status and Outlook of CHIP-TRAP: the Central Michigan University High Precision Penning Trap","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"Curtis Hunt, Ishara S. Ratnayake, Lance Sharp, Matthew Redshaw, Nadeesha D. Gamage, Paul Hawks, Rathnayake M. E. B. Kandegedara, Richard A. Bryce","submitted_at":"2015-10-25T03:58:38Z","abstract_excerpt":"At Central Michigan University we are developing a high-precision Penning trap mass spectrometer (CHIP-TRAP)that will focus on measurements with long-lived radioactive isotopes. CHIP-TRAP will consist of a pair of hyperbolic precision-measurement Penning traps, and a cylindrical capture/filter trap in a 12 T magnetic field. Ions will be produced by external ion sources, including a laser ablation source, and transported to the capture trap at low energies enabling ions of a given m=q ratio to be selected via their time-of-flight. In the capture trap, contaminant ions will be removed with a mas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07203","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":"2026-05-18T01:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wafLCKT6gdzdk06+yNSfkVUdLzjw48yJffs8E/FMEgBpkoeTXxi25JNUNkradgn2dt/HCWlrNPHck0O7XqwsBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:10:19.564964Z"},"content_sha256":"ca62a084e77c2a3c0838d0bd2ea48a9e7f036dfef5d5d2f9c0533d0c0436647d","schema_version":"1.0","event_id":"sha256:ca62a084e77c2a3c0838d0bd2ea48a9e7f036dfef5d5d2f9c0533d0c0436647d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC/bundle.json","state_url":"https://pith.science/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC/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":"2026-07-07T15:10:19Z","links":{"resolver":"https://pith.science/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC","bundle":"https://pith.science/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC/bundle.json","state":"https://pith.science/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VBQGBIJV3QJSCFZFU4GMFDY6HC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VBQGBIJV3QJSCFZFU4GMFDY6HC","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":"0b7707c5366736041328ba5ac8fb5bc94ea68094c0d1ae941f4d9752cbadd30a","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-10-25T03:58:38Z","title_canon_sha256":"5d047e49526c526015077015fd0067b88dcb5937dbaf28e9df132a05670e5b85"},"schema_version":"1.0","source":{"id":"1510.07203","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07203","created_at":"2026-05-18T01:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07203v1","created_at":"2026-05-18T01:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07203","created_at":"2026-05-18T01:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"VBQGBIJV3QJS","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"VBQGBIJV3QJSCFZF","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"VBQGBIJV","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:ca62a084e77c2a3c0838d0bd2ea48a9e7f036dfef5d5d2f9c0533d0c0436647d","target":"graph","created_at":"2026-05-18T01:01:00Z","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":"At Central Michigan University we are developing a high-precision Penning trap mass spectrometer (CHIP-TRAP)that will focus on measurements with long-lived radioactive isotopes. CHIP-TRAP will consist of a pair of hyperbolic precision-measurement Penning traps, and a cylindrical capture/filter trap in a 12 T magnetic field. Ions will be produced by external ion sources, including a laser ablation source, and transported to the capture trap at low energies enabling ions of a given m=q ratio to be selected via their time-of-flight. In the capture trap, contaminant ions will be removed with a mas","authors_text":"Curtis Hunt, Ishara S. Ratnayake, Lance Sharp, Matthew Redshaw, Nadeesha D. Gamage, Paul Hawks, Rathnayake M. E. B. Kandegedara, Richard A. Bryce","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-10-25T03:58:38Z","title":"Status and Outlook of CHIP-TRAP: the Central Michigan University High Precision Penning Trap"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07203","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":"sha256:74f688da2302683ebca2e3bf458a4fa19934100574a86f7759a55581534de9d2","target":"record","created_at":"2026-05-18T01:01:00Z","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":"0b7707c5366736041328ba5ac8fb5bc94ea68094c0d1ae941f4d9752cbadd30a","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-10-25T03:58:38Z","title_canon_sha256":"5d047e49526c526015077015fd0067b88dcb5937dbaf28e9df132a05670e5b85"},"schema_version":"1.0","source":{"id":"1510.07203","kind":"arxiv","version":1}},"canonical_sha256":"a86060a135dc13211725a70cc28f1e38848f56c82bd95ea35059db04ae316f60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a86060a135dc13211725a70cc28f1e38848f56c82bd95ea35059db04ae316f60","first_computed_at":"2026-05-18T01:01:00.965524Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:01:00.965524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f9MOB+u8CDpleVdKkhxDP63MZ8iug4fA220EticgBxyrxvayCHZD7J2yN7f4/+GUC5mmty1X5SHy5lIqlII5Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:01:00.966196Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.07203","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74f688da2302683ebca2e3bf458a4fa19934100574a86f7759a55581534de9d2","sha256:ca62a084e77c2a3c0838d0bd2ea48a9e7f036dfef5d5d2f9c0533d0c0436647d"],"state_sha256":"ef522dfc5fe8b6b392da6695ac3a555484d7072fc167b50317aeed00c95a981f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rNsyW/KoVs01AczMZ0xo9XrRZGg7z692LSqkFgf25OLz2Hs1r5iEkNioUbanq7ep/Sc+o7T5d13uQCUk2JWrBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T15:10:19.566862Z","bundle_sha256":"db348f32db69af19c54524f3574ea6de98aa8296b3cc26090958a75009babcef"}}