{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AESTMUBZQTGPC6BLRQAX6DYUSE","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":"46e5894a21dbc284c5ec39d4ec3709f02cf959345341b765316bbffc884841df","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-11-27T15:46:47Z","title_canon_sha256":"bdf21f11f60c511a5e265908b7e9e432420df8a087d7c5fda149e20fa5a0d52d"},"schema_version":"1.0","source":{"id":"1811.11061","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.11061","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"arxiv_version","alias_value":"1811.11061v1","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.11061","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"pith_short_12","alias_value":"AESTMUBZQTGP","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AESTMUBZQTGPC6BL","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AESTMUBZ","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:39b493288e75c62ec8ec79ff3dbdeee3f12be4ba0b0297bff59d552ca3bb3e2c","target":"graph","created_at":"2026-05-17T23:50:22Z","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":"Imaging of structural defects in a material can be realized with a radio-frequency atomic magnetometer by monitoring the material's response to a radio-frequency excitation field. We demonstrate two measurement configurations that enable the increase of the amplitude and phase contrast in images that represent a structural defect in highly electrically conductive and high magnetic permeability samples. Both concepts involve the elimination of the excitation field component, orthogonal to the sample surface, from the atomic magnetometer signal. The first method relies on the implementation of a","authors_text":"P. Bevington, R. Gartman, W. Chalupczak","cross_cats":["physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-11-27T15:46:47Z","title":"Enhanced material defects imaging with a radio-frequency atomic magnetometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.11061","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":"sha256:86da80a7f6c1ea9cc0d57216782e59fe8f523e9c157beec10911ebe101cdce62","target":"record","created_at":"2026-05-17T23:50:22Z","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":"46e5894a21dbc284c5ec39d4ec3709f02cf959345341b765316bbffc884841df","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-11-27T15:46:47Z","title_canon_sha256":"bdf21f11f60c511a5e265908b7e9e432420df8a087d7c5fda149e20fa5a0d52d"},"schema_version":"1.0","source":{"id":"1811.11061","kind":"arxiv","version":1}},"canonical_sha256":"012536503984ccf1782b8c017f0f14913a638e4bd146548aa40b45261a999330","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"012536503984ccf1782b8c017f0f14913a638e4bd146548aa40b45261a999330","first_computed_at":"2026-05-17T23:50:22.766210Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:22.766210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ijQAgzGADbeZJW1iYEZsBQx/hWgq3PtqUcVKdKHBJAiuzblLtvOt+ezDkNNI95o5Led8SIDnV4P2Sl9EM9LiCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:22.766877Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.11061","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:86da80a7f6c1ea9cc0d57216782e59fe8f523e9c157beec10911ebe101cdce62","sha256:39b493288e75c62ec8ec79ff3dbdeee3f12be4ba0b0297bff59d552ca3bb3e2c"],"state_sha256":"16765f502ea3722b3dee8b9d29e9fd96fb27c87023bc2b2249188df5ba4e93bc"}