{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:5FTI7QDJOI56CLJJOYJT5UZXE6","short_pith_number":"pith:5FTI7QDJ","canonical_record":{"source":{"id":"1606.03151","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-06-10T00:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"d4a89683caa780fe1f99cdaaf9ffdf61744097eee3d3a6c1dcdf498fd8f3a637","abstract_canon_sha256":"034b6a9cdbb88bc7f51cc9993de8c4c0ff5779eeb24002cd072cb0a020a1a6ec"},"schema_version":"1.0"},"canonical_sha256":"e9668fc069723be12d2976133ed33727a4ae1c3225e71805721bfbada4858454","source":{"kind":"arxiv","id":"1606.03151","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.03151","created_at":"2026-05-18T01:08:40Z"},{"alias_kind":"arxiv_version","alias_value":"1606.03151v2","created_at":"2026-05-18T01:08:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.03151","created_at":"2026-05-18T01:08:40Z"},{"alias_kind":"pith_short_12","alias_value":"5FTI7QDJOI56","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5FTI7QDJOI56CLJJ","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5FTI7QDJ","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:5FTI7QDJOI56CLJJOYJT5UZXE6","target":"record","payload":{"canonical_record":{"source":{"id":"1606.03151","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-06-10T00:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"d4a89683caa780fe1f99cdaaf9ffdf61744097eee3d3a6c1dcdf498fd8f3a637","abstract_canon_sha256":"034b6a9cdbb88bc7f51cc9993de8c4c0ff5779eeb24002cd072cb0a020a1a6ec"},"schema_version":"1.0"},"canonical_sha256":"e9668fc069723be12d2976133ed33727a4ae1c3225e71805721bfbada4858454","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:40.442881Z","signature_b64":"j6OzeNOghMFGN2+SBlwQdM+gyjKUzYMjoLsuNDwjOfgwlmkz3+/m/RpyNCP4o9JxnPIJIV+h7ZN4F68vF5r2BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9668fc069723be12d2976133ed33727a4ae1c3225e71805721bfbada4858454","last_reissued_at":"2026-05-18T01:08:40.442400Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:40.442400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.03151","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:08:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+SfceGD7ar4F4AS2S9x9YBuS9XPkajIhViho7ChRyRKDLEmEPgWSZZRpcQmKYiBKcjOd89Gfn8Js/s91FHrCAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:23:39.997753Z"},"content_sha256":"ca126c2d7d6376173271b91abbffc48d33f36ab1c1c56dcef25379c7dc05d91d","schema_version":"1.0","event_id":"sha256:ca126c2d7d6376173271b91abbffc48d33f36ab1c1c56dcef25379c7dc05d91d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:5FTI7QDJOI56CLJJOYJT5UZXE6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Onion-peeling inversion of stellarator images","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"F. A. Volpe, K. C. Hammond, R. Diaz-Pacheco, Y. Kornbluth, Y. Wei","submitted_at":"2016-06-10T00:58:44Z","abstract_excerpt":"An onion-peeling technique is developed for inferring the emissivity profile of a stellarator plasma from a two-dimensional image acquired through a CCD or CMOS camera. Each pixel in the image is treated as an integral of emission along a particular line-of-sight. Additionally, the flux surfaces in the plasma are partitioned into discrete layers, each of which is assumed to have uniform emissivity. If the topology of the flux surfaces is known, this construction permits the development of a system of linear equations that can be solved for the emissivity of each layer. We present initial resul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.03151","kind":"arxiv","version":2},"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":"2026-05-18T01:08:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Len2bCaPh8wDSfPNJRrSV+m6BL/6QOv6symoWpZ3h3ThuiIpmOTLY7MJB0Wuao0XO99xYgCRshg7GZk+NfN0DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:23:39.998293Z"},"content_sha256":"2f2e55c314f9ea6bba89dd9818ba68c1ad70eafcbcac70a93e95d8d033f51be6","schema_version":"1.0","event_id":"sha256:2f2e55c314f9ea6bba89dd9818ba68c1ad70eafcbcac70a93e95d8d033f51be6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5FTI7QDJOI56CLJJOYJT5UZXE6/bundle.json","state_url":"https://pith.science/pith/5FTI7QDJOI56CLJJOYJT5UZXE6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5FTI7QDJOI56CLJJOYJT5UZXE6/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":"2026-06-04T23:23:39Z","links":{"resolver":"https://pith.science/pith/5FTI7QDJOI56CLJJOYJT5UZXE6","bundle":"https://pith.science/pith/5FTI7QDJOI56CLJJOYJT5UZXE6/bundle.json","state":"https://pith.science/pith/5FTI7QDJOI56CLJJOYJT5UZXE6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5FTI7QDJOI56CLJJOYJT5UZXE6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5FTI7QDJOI56CLJJOYJT5UZXE6","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":"034b6a9cdbb88bc7f51cc9993de8c4c0ff5779eeb24002cd072cb0a020a1a6ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-06-10T00:58:44Z","title_canon_sha256":"d4a89683caa780fe1f99cdaaf9ffdf61744097eee3d3a6c1dcdf498fd8f3a637"},"schema_version":"1.0","source":{"id":"1606.03151","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.03151","created_at":"2026-05-18T01:08:40Z"},{"alias_kind":"arxiv_version","alias_value":"1606.03151v2","created_at":"2026-05-18T01:08:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.03151","created_at":"2026-05-18T01:08:40Z"},{"alias_kind":"pith_short_12","alias_value":"5FTI7QDJOI56","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5FTI7QDJOI56CLJJ","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5FTI7QDJ","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:2f2e55c314f9ea6bba89dd9818ba68c1ad70eafcbcac70a93e95d8d033f51be6","target":"graph","created_at":"2026-05-18T01:08:40Z","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":"An onion-peeling technique is developed for inferring the emissivity profile of a stellarator plasma from a two-dimensional image acquired through a CCD or CMOS camera. Each pixel in the image is treated as an integral of emission along a particular line-of-sight. Additionally, the flux surfaces in the plasma are partitioned into discrete layers, each of which is assumed to have uniform emissivity. If the topology of the flux surfaces is known, this construction permits the development of a system of linear equations that can be solved for the emissivity of each layer. We present initial resul","authors_text":"F. A. Volpe, K. C. Hammond, R. Diaz-Pacheco, Y. Kornbluth, Y. Wei","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-06-10T00:58:44Z","title":"Onion-peeling inversion of stellarator images"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.03151","kind":"arxiv","version":2},"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:ca126c2d7d6376173271b91abbffc48d33f36ab1c1c56dcef25379c7dc05d91d","target":"record","created_at":"2026-05-18T01:08:40Z","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":"034b6a9cdbb88bc7f51cc9993de8c4c0ff5779eeb24002cd072cb0a020a1a6ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-06-10T00:58:44Z","title_canon_sha256":"d4a89683caa780fe1f99cdaaf9ffdf61744097eee3d3a6c1dcdf498fd8f3a637"},"schema_version":"1.0","source":{"id":"1606.03151","kind":"arxiv","version":2}},"canonical_sha256":"e9668fc069723be12d2976133ed33727a4ae1c3225e71805721bfbada4858454","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9668fc069723be12d2976133ed33727a4ae1c3225e71805721bfbada4858454","first_computed_at":"2026-05-18T01:08:40.442400Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:40.442400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j6OzeNOghMFGN2+SBlwQdM+gyjKUzYMjoLsuNDwjOfgwlmkz3+/m/RpyNCP4o9JxnPIJIV+h7ZN4F68vF5r2BA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:40.442881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.03151","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca126c2d7d6376173271b91abbffc48d33f36ab1c1c56dcef25379c7dc05d91d","sha256:2f2e55c314f9ea6bba89dd9818ba68c1ad70eafcbcac70a93e95d8d033f51be6"],"state_sha256":"b4764a610f94c8db9cd061bf478d1a4034d024c780729e49a9fbb20e3eb036d3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k9uN6grmn9XTu4L+XVauSGo+Wk/iyCiQr45v13fBq0dbj7htSiZBXJB/gaKjAE9uMC0Gfz5H4z4DeUYKD8fzCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T23:23:40.001026Z","bundle_sha256":"bfe51b32e5b8e0232c51cb6052ea000531ad521d5b2006df784d4b20dd906a8f"}}