{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:P5XI7KJU3QVX7Z77NHQMS4DDXU","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":"e153729d405168bb51386108512a82e9394e817cea3e26d8411d8994c190850b","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-12-14T18:26:19Z","title_canon_sha256":"c0951108b97b569229bd945211144a0f1c9b43be4fb7df02b0d2c42bce6d3991"},"schema_version":"1.0","source":{"id":"1212.3560","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3560","created_at":"2026-05-18T03:38:24Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3560v1","created_at":"2026-05-18T03:38:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3560","created_at":"2026-05-18T03:38:24Z"},{"alias_kind":"pith_short_12","alias_value":"P5XI7KJU3QVX","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"P5XI7KJU3QVX7Z77","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"P5XI7KJU","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:56181be000f3b2fd7518c76548473e3a2580833410449fb0b56b321afd5d7d7d","target":"graph","created_at":"2026-05-18T03:38:24Z","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":"This paper proposes a new X-ray radiographic technique for measuring density uniformity of silica aerogels used as radiator in proximity-focusing ring-imaging Cherenkov detectors. To obtain high performance in a large-area detector, a key characteristic of radiator is the density (i.e. refractive index) uniformity of an individual aerogel monolith. At a refractive index of n = 1.05, our requirement for the refractive index uniformity in the transverse plane direction of an aerogel tile is |\\delta (n - 1)/(n - 1)| < 4% in a focusing dual layer radiator (with different refractive indices) scheme","authors_text":"Ichiro Adachi, Keiko Nishikawa, Makoto Tabata, Takeshi Morita, Yoshikiyo Hatakeyama","cross_cats":["hep-ex","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-12-14T18:26:19Z","title":"X-ray radiographic technique for measuring density uniformity of silica aerogel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3560","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":"sha256:2d1a83db7b52446efe5f69348920380c406bdb46740c249978223fe53ef3fb9b","target":"record","created_at":"2026-05-18T03:38:24Z","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":"e153729d405168bb51386108512a82e9394e817cea3e26d8411d8994c190850b","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-12-14T18:26:19Z","title_canon_sha256":"c0951108b97b569229bd945211144a0f1c9b43be4fb7df02b0d2c42bce6d3991"},"schema_version":"1.0","source":{"id":"1212.3560","kind":"arxiv","version":1}},"canonical_sha256":"7f6e8fa934dc2b7fe7ff69e0c97063bd2a3ee355ca6867feb84c6cfe83281a77","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7f6e8fa934dc2b7fe7ff69e0c97063bd2a3ee355ca6867feb84c6cfe83281a77","first_computed_at":"2026-05-18T03:38:24.288336Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:24.288336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JkJHv2WFcGv44D6pUqLmbJOwb9h3AK649blrG+AHaUBprkP/pqfeK+r45ddT13KzWTMpmN9TQodXJogLt3xKAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:24.288944Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.3560","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d1a83db7b52446efe5f69348920380c406bdb46740c249978223fe53ef3fb9b","sha256:56181be000f3b2fd7518c76548473e3a2580833410449fb0b56b321afd5d7d7d"],"state_sha256":"6efc2a0d68b5c5d479ee735e228de32667e200b1903062274e54eb70c2b50b44"}