{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:EEGOJI64SD7BOUNPHFGBUN5YSI","short_pith_number":"pith:EEGOJI64","canonical_record":{"source":{"id":"1804.07123","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-19T12:49:57Z","cross_cats_sorted":[],"title_canon_sha256":"24ac283510d8952673f87ff1fd9a15dd7d84bd906ff3bb0708794ca75f7163fe","abstract_canon_sha256":"86813b10f5d6b33b9f53b91455ce240ce8f39f19f1ce78dff4282b7d4929ef79"},"schema_version":"1.0"},"canonical_sha256":"210ce4a3dc90fe1751af394c1a37b8922b0702905591bf2c6f0f870f90154cbe","source":{"kind":"arxiv","id":"1804.07123","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.07123","created_at":"2026-05-18T00:11:30Z"},{"alias_kind":"arxiv_version","alias_value":"1804.07123v2","created_at":"2026-05-18T00:11:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.07123","created_at":"2026-05-18T00:11:30Z"},{"alias_kind":"pith_short_12","alias_value":"EEGOJI64SD7B","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"EEGOJI64SD7BOUNP","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"EEGOJI64","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:EEGOJI64SD7BOUNPHFGBUN5YSI","target":"record","payload":{"canonical_record":{"source":{"id":"1804.07123","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-19T12:49:57Z","cross_cats_sorted":[],"title_canon_sha256":"24ac283510d8952673f87ff1fd9a15dd7d84bd906ff3bb0708794ca75f7163fe","abstract_canon_sha256":"86813b10f5d6b33b9f53b91455ce240ce8f39f19f1ce78dff4282b7d4929ef79"},"schema_version":"1.0"},"canonical_sha256":"210ce4a3dc90fe1751af394c1a37b8922b0702905591bf2c6f0f870f90154cbe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:30.173264Z","signature_b64":"6dHF6yC5gNopJa4A5JOwPjSEFukpkHadvGKwwjjIrrMNYX99p5bk37E5p2Ut7Rm/EuW+iYxm96IZAK60hotMAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"210ce4a3dc90fe1751af394c1a37b8922b0702905591bf2c6f0f870f90154cbe","last_reissued_at":"2026-05-18T00:11:30.172798Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:30.172798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.07123","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":"2026-05-18T00:11:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M4ZQquEO+SeCll2WBR3u7O52e10wYIdTBY6h3hwtbsQX3QXTTYMGBeEWh1HhcDDWnjTUK9qdUztRqrtMwevdAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:12:44.141908Z"},"content_sha256":"35e524e8bc0057cd61df28f8d1d4113872201c5f384200219c99fa8b4a8a5a3b","schema_version":"1.0","event_id":"sha256:35e524e8bc0057cd61df28f8d1d4113872201c5f384200219c99fa8b4a8a5a3b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:EEGOJI64SD7BOUNPHFGBUN5YSI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radial structure of vorticity in the plasma boundary of ISTTOK tokamak","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"A. H. Nielsen, B. Gon\\c{c}alves, C. Hidalgo, C. Silva, H. Figueiredo, I. Henriques, J.T. Mendon\\c{c}a, V. Naulin","submitted_at":"2018-04-19T12:49:57Z","abstract_excerpt":"The first experimental measurements of vorticity and vorticity flux in a fusion device were performed in tokamak ISTTOK. This is an important achievement since vorticity plays a key role in the transport of energy and particles in plasmas and fluids. The measurements were performed with a specifically designed array of Langmuir probes in the plasma edge of the small tokamak ISTTOK. The experimental results presented in this paper, allowing for the first time a direct comparison with theoretical models, show that the vorticity flux feeds into the shear flow in the tokamak plasma edge region. Th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.07123","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":"2026-05-18T00:11:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B4twqLncV9jA/rYdXXG3+FbCFZ1kDfOyz2Cl3ZlY98PZSGhbBb+eXBIQh0H4cJcTsvabWtYETHr0C9jsvF39DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:12:44.142569Z"},"content_sha256":"f3bf581acaebfbbf688a6bdcea5fc9465fd438c6a782c8375086dc6c18302371","schema_version":"1.0","event_id":"sha256:f3bf581acaebfbbf688a6bdcea5fc9465fd438c6a782c8375086dc6c18302371"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EEGOJI64SD7BOUNPHFGBUN5YSI/bundle.json","state_url":"https://pith.science/pith/EEGOJI64SD7BOUNPHFGBUN5YSI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EEGOJI64SD7BOUNPHFGBUN5YSI/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":"2026-05-28T04:12:44Z","links":{"resolver":"https://pith.science/pith/EEGOJI64SD7BOUNPHFGBUN5YSI","bundle":"https://pith.science/pith/EEGOJI64SD7BOUNPHFGBUN5YSI/bundle.json","state":"https://pith.science/pith/EEGOJI64SD7BOUNPHFGBUN5YSI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EEGOJI64SD7BOUNPHFGBUN5YSI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:EEGOJI64SD7BOUNPHFGBUN5YSI","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":"86813b10f5d6b33b9f53b91455ce240ce8f39f19f1ce78dff4282b7d4929ef79","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-19T12:49:57Z","title_canon_sha256":"24ac283510d8952673f87ff1fd9a15dd7d84bd906ff3bb0708794ca75f7163fe"},"schema_version":"1.0","source":{"id":"1804.07123","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.07123","created_at":"2026-05-18T00:11:30Z"},{"alias_kind":"arxiv_version","alias_value":"1804.07123v2","created_at":"2026-05-18T00:11:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.07123","created_at":"2026-05-18T00:11:30Z"},{"alias_kind":"pith_short_12","alias_value":"EEGOJI64SD7B","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"EEGOJI64SD7BOUNP","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"EEGOJI64","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:f3bf581acaebfbbf688a6bdcea5fc9465fd438c6a782c8375086dc6c18302371","target":"graph","created_at":"2026-05-18T00:11:30Z","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":"The first experimental measurements of vorticity and vorticity flux in a fusion device were performed in tokamak ISTTOK. This is an important achievement since vorticity plays a key role in the transport of energy and particles in plasmas and fluids. The measurements were performed with a specifically designed array of Langmuir probes in the plasma edge of the small tokamak ISTTOK. The experimental results presented in this paper, allowing for the first time a direct comparison with theoretical models, show that the vorticity flux feeds into the shear flow in the tokamak plasma edge region. Th","authors_text":"A. H. Nielsen, B. Gon\\c{c}alves, C. Hidalgo, C. Silva, H. Figueiredo, I. Henriques, J.T. Mendon\\c{c}a, V. Naulin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-19T12:49:57Z","title":"Radial structure of vorticity in the plasma boundary of ISTTOK tokamak"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.07123","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":"sha256:35e524e8bc0057cd61df28f8d1d4113872201c5f384200219c99fa8b4a8a5a3b","target":"record","created_at":"2026-05-18T00:11:30Z","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":"86813b10f5d6b33b9f53b91455ce240ce8f39f19f1ce78dff4282b7d4929ef79","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2018-04-19T12:49:57Z","title_canon_sha256":"24ac283510d8952673f87ff1fd9a15dd7d84bd906ff3bb0708794ca75f7163fe"},"schema_version":"1.0","source":{"id":"1804.07123","kind":"arxiv","version":2}},"canonical_sha256":"210ce4a3dc90fe1751af394c1a37b8922b0702905591bf2c6f0f870f90154cbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"210ce4a3dc90fe1751af394c1a37b8922b0702905591bf2c6f0f870f90154cbe","first_computed_at":"2026-05-18T00:11:30.172798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:30.172798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6dHF6yC5gNopJa4A5JOwPjSEFukpkHadvGKwwjjIrrMNYX99p5bk37E5p2Ut7Rm/EuW+iYxm96IZAK60hotMAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:30.173264Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.07123","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:35e524e8bc0057cd61df28f8d1d4113872201c5f384200219c99fa8b4a8a5a3b","sha256:f3bf581acaebfbbf688a6bdcea5fc9465fd438c6a782c8375086dc6c18302371"],"state_sha256":"da07c0f2f507ee0a528142a49e3a349853b97cdca44037d76f76814a4c51d35b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OUmFRhnHt75PXAH6h4jzDIPsn39zZ/zOnpDW0amj86MB1gsw1T5ENaZA60/YWI5ikobeSR4IyAfUN3PCI6VzAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:12:44.145638Z","bundle_sha256":"da9c6a1518d6d063cc79ef5818dbff198fde6bd3f0a1b91f279a67e7eb735276"}}