{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:X5KHGNON5PJ2UBGPI54JKUGITH","short_pith_number":"pith:X5KHGNON","canonical_record":{"source":{"id":"2204.02118","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-04-05T11:29:53Z","cross_cats_sorted":[],"title_canon_sha256":"ffd74854c75a30d5b5fd9ad9ee6a89793228ad036b410da2f92709b99e6a01d0","abstract_canon_sha256":"5576f9ff7d46a5881c579fab101af290a2400772435190b2d0c72e1e91e05c6d"},"schema_version":"1.0"},"canonical_sha256":"bf547335cdebd3aa04cf47789550c899d696415adc2400020ab68a09ebe74b54","source":{"kind":"arxiv","id":"2204.02118","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.02118","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"2204.02118v2","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.02118","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"X5KHGNON5PJ2","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"pith_short_16","alias_value":"X5KHGNON5PJ2UBGP","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"pith_short_8","alias_value":"X5KHGNON","created_at":"2026-07-05T05:15:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:X5KHGNON5PJ2UBGPI54JKUGITH","target":"record","payload":{"canonical_record":{"source":{"id":"2204.02118","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-04-05T11:29:53Z","cross_cats_sorted":[],"title_canon_sha256":"ffd74854c75a30d5b5fd9ad9ee6a89793228ad036b410da2f92709b99e6a01d0","abstract_canon_sha256":"5576f9ff7d46a5881c579fab101af290a2400772435190b2d0c72e1e91e05c6d"},"schema_version":"1.0"},"canonical_sha256":"bf547335cdebd3aa04cf47789550c899d696415adc2400020ab68a09ebe74b54","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:15:38.423948Z","signature_b64":"6RTWSG8Vo15YOUsDOGJklUDlKVgCDClUjlKOaUSXpKfyfAfsKEezO1YiW1mPxfDN5TTd1OdJL0O+LSdhgOezCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf547335cdebd3aa04cf47789550c899d696415adc2400020ab68a09ebe74b54","last_reissued_at":"2026-07-05T05:15:38.423468Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:15:38.423468Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2204.02118","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":"2026-07-05T05:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U3tDEhdnTgp3A5cjmLqhYPwJJfyD7VynFJIEtXqUVmBQrSVjPs2euwXCIjCicp/lSWJZv0qaofWlH1IB7IKrDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T16:24:46.925415Z"},"content_sha256":"630b333dba8f7f21060554b3b7de20f10dca663c1beaac5feaf5c085058aed97","schema_version":"1.0","event_id":"sha256:630b333dba8f7f21060554b3b7de20f10dca663c1beaac5feaf5c085058aed97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:X5KHGNON5PJ2UBGPI54JKUGITH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopic investigations of detachment on the MAST Upgrade Super-X divertor","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"Aelwyn Williams, Alexandre Fil, Andrew Thornton, Basil Duval, Bob Kool, Bruce Lipschultz, David Moulton, Fabio Federici, Geof Cunningham, James Clark, James Harrison, Kevin Verhaegh, Nick Osborne, Omkar Myatra, Peter Ryan, Rory Scannell, Stuart Henderson, the MAST Upgrade team, Thomas Bosman, Tijs Wijkamp","submitted_at":"2022-04-05T11:29:53Z","abstract_excerpt":"We present the first analysis of the atomic and molecular processes at play during detachment in the MAST-U Super-X divertor using divertor spectroscopy data. Our analysis indicates detachment in the MAST-U Super-X divertor can be separated into four sequential phases: First, the ionisation region detaches from the target at detachment onset leaving a region of increased molecular densities downstream. The plasma interacts with these molecules, resulting in molecular ions ($D_2^+$ and/or $D_2^- \\rightarrow D + D^-$) that further react with the plasma leading to Molecular Activated Recombinatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.02118","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2204.02118/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vfysd9Id24rCfl5RsOf9dUHay1XYDdSy31uFJ4Dfmn9iAEs2geCR6OP/TSyecSqOJOtc66+IEabS+km+CnMSCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T16:24:46.925788Z"},"content_sha256":"cf1737c5c49f48814450ed0a2d9fdbfc934affaebf50564b80f27299c950cbf8","schema_version":"1.0","event_id":"sha256:cf1737c5c49f48814450ed0a2d9fdbfc934affaebf50564b80f27299c950cbf8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X5KHGNON5PJ2UBGPI54JKUGITH/bundle.json","state_url":"https://pith.science/pith/X5KHGNON5PJ2UBGPI54JKUGITH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X5KHGNON5PJ2UBGPI54JKUGITH/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":"2026-07-08T16:24:46Z","links":{"resolver":"https://pith.science/pith/X5KHGNON5PJ2UBGPI54JKUGITH","bundle":"https://pith.science/pith/X5KHGNON5PJ2UBGPI54JKUGITH/bundle.json","state":"https://pith.science/pith/X5KHGNON5PJ2UBGPI54JKUGITH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X5KHGNON5PJ2UBGPI54JKUGITH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:X5KHGNON5PJ2UBGPI54JKUGITH","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":"5576f9ff7d46a5881c579fab101af290a2400772435190b2d0c72e1e91e05c6d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-04-05T11:29:53Z","title_canon_sha256":"ffd74854c75a30d5b5fd9ad9ee6a89793228ad036b410da2f92709b99e6a01d0"},"schema_version":"1.0","source":{"id":"2204.02118","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.02118","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"2204.02118v2","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.02118","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"X5KHGNON5PJ2","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"pith_short_16","alias_value":"X5KHGNON5PJ2UBGP","created_at":"2026-07-05T05:15:38Z"},{"alias_kind":"pith_short_8","alias_value":"X5KHGNON","created_at":"2026-07-05T05:15:38Z"}],"graph_snapshots":[{"event_id":"sha256:cf1737c5c49f48814450ed0a2d9fdbfc934affaebf50564b80f27299c950cbf8","target":"graph","created_at":"2026-07-05T05:15:38Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2204.02118/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first analysis of the atomic and molecular processes at play during detachment in the MAST-U Super-X divertor using divertor spectroscopy data. Our analysis indicates detachment in the MAST-U Super-X divertor can be separated into four sequential phases: First, the ionisation region detaches from the target at detachment onset leaving a region of increased molecular densities downstream. The plasma interacts with these molecules, resulting in molecular ions ($D_2^+$ and/or $D_2^- \\rightarrow D + D^-$) that further react with the plasma leading to Molecular Activated Recombinatio","authors_text":"Aelwyn Williams, Alexandre Fil, Andrew Thornton, Basil Duval, Bob Kool, Bruce Lipschultz, David Moulton, Fabio Federici, Geof Cunningham, James Clark, James Harrison, Kevin Verhaegh, Nick Osborne, Omkar Myatra, Peter Ryan, Rory Scannell, Stuart Henderson, the MAST Upgrade team, Thomas Bosman, Tijs Wijkamp","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-04-05T11:29:53Z","title":"Spectroscopic investigations of detachment on the MAST Upgrade Super-X divertor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.02118","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":"sha256:630b333dba8f7f21060554b3b7de20f10dca663c1beaac5feaf5c085058aed97","target":"record","created_at":"2026-07-05T05:15:38Z","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":"5576f9ff7d46a5881c579fab101af290a2400772435190b2d0c72e1e91e05c6d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2022-04-05T11:29:53Z","title_canon_sha256":"ffd74854c75a30d5b5fd9ad9ee6a89793228ad036b410da2f92709b99e6a01d0"},"schema_version":"1.0","source":{"id":"2204.02118","kind":"arxiv","version":2}},"canonical_sha256":"bf547335cdebd3aa04cf47789550c899d696415adc2400020ab68a09ebe74b54","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf547335cdebd3aa04cf47789550c899d696415adc2400020ab68a09ebe74b54","first_computed_at":"2026-07-05T05:15:38.423468Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:15:38.423468Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6RTWSG8Vo15YOUsDOGJklUDlKVgCDClUjlKOaUSXpKfyfAfsKEezO1YiW1mPxfDN5TTd1OdJL0O+LSdhgOezCA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:15:38.423948Z","signed_message":"canonical_sha256_bytes"},"source_id":"2204.02118","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:630b333dba8f7f21060554b3b7de20f10dca663c1beaac5feaf5c085058aed97","sha256:cf1737c5c49f48814450ed0a2d9fdbfc934affaebf50564b80f27299c950cbf8"],"state_sha256":"054d21738cb6265fb468d8a5d869a0bbba3c2b4769d4095f50bac95755233b7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VblDk28p0U6zelmOgp5DtnfU115BJXhbymojSWCHO7j6LWmFLZrKhg0r2KDh5Htcdg9GraDvtK94zl0LC9b0Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T16:24:46.927782Z","bundle_sha256":"3a20aa4da84ba145a538f2eef47253f897f80ee7a7cf03231e092fb6f1fc9e82"}}