{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IF5B4DL54NKAHL562WB35IDGTX","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":"e2bff6705b7b05cbf25877884c1683f3eace7c42ac6984968494edd94cbb9bc1","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-06-23T22:47:48Z","title_canon_sha256":"34536a1bb28b9228360c2b5674373ba666de1ee204d6081e199121ea85a6ed89"},"schema_version":"1.0","source":{"id":"1106.4851","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4851","created_at":"2026-05-18T04:12:10Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4851v1","created_at":"2026-05-18T04:12:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4851","created_at":"2026-05-18T04:12:10Z"},{"alias_kind":"pith_short_12","alias_value":"IF5B4DL54NKA","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IF5B4DL54NKAHL56","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IF5B4DL5","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:1abbe59c4f929ab9f6412bb1f88a741bad760a06b8d0c90e080859808716a703","target":"graph","created_at":"2026-05-18T04:12:10Z","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":"A wide range of nucleon and nuclear structure experiments in Jefferson Lab's Hall A require precise, continuous measurements of the polarization of the electron beam. In our Compton polarimeter, electrons are scattered off photons in a Fabry-Perot cavity; by measuring an asymmetry in the integrated signal of the scattered photons detected in a GSO crystal, we can make non-invasive, continuous measurements of the beam polarization. Our goal is to achieve 1% statistical error within two hours of running. We discuss the design and commissioning of an upgrade to this apparatus, and report prelimin","authors_text":"B. Quinn, D. Parno, F. Benmokhtar, G. Franklin, M. Friend, P. Souder, R. Michaels, S. Nanda","cross_cats":["hep-ex","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-06-23T22:47:48Z","title":"Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4851","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":"sha256:511edcab0ae36236f47c135b8be0d48400650b484ec337c5985070e71a1047f4","target":"record","created_at":"2026-05-18T04:12:10Z","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":"e2bff6705b7b05cbf25877884c1683f3eace7c42ac6984968494edd94cbb9bc1","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2011-06-23T22:47:48Z","title_canon_sha256":"34536a1bb28b9228360c2b5674373ba666de1ee204d6081e199121ea85a6ed89"},"schema_version":"1.0","source":{"id":"1106.4851","kind":"arxiv","version":1}},"canonical_sha256":"417a1e0d7de35403afbed583bea0669dd8881f18b35af2a0b60689a131e56606","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"417a1e0d7de35403afbed583bea0669dd8881f18b35af2a0b60689a131e56606","first_computed_at":"2026-05-18T04:12:10.202946Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:10.202946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m/zS7hj25j/iCDqipiV3wNkUtLYt0MnLVCfEO5QUTJ6Cw6st/BZ6VUCxgQNgatp+z5WeBTzrf1v63wFAJ2ZdCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:10.203772Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.4851","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:511edcab0ae36236f47c135b8be0d48400650b484ec337c5985070e71a1047f4","sha256:1abbe59c4f929ab9f6412bb1f88a741bad760a06b8d0c90e080859808716a703"],"state_sha256":"c32826e63846c02b4c299eb82b179c34fa5b6e36b7f320745cd3ade42b019d8f"}