{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:NBIUDY7LT2VHXF45N4SZEFQX6I","short_pith_number":"pith:NBIUDY7L","canonical_record":{"source":{"id":"2405.05451","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-05-08T23:00:02Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"2fc5243846bf3057799f481abc582e2b0e217ea7cb957326ee405db52bdcdaf0","abstract_canon_sha256":"361697bd62c43c4751ec44b3c2fa01abefdeebddebc1acd0fcbf1c33625598dc"},"schema_version":"1.0"},"canonical_sha256":"685141e3eb9eaa7b979d6f25921617f23654d5b99411b7054b3d5f29fc889648","source":{"kind":"arxiv","id":"2405.05451","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.05451","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"arxiv_version","alias_value":"2405.05451v1","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.05451","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"pith_short_12","alias_value":"NBIUDY7LT2VH","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"pith_short_16","alias_value":"NBIUDY7LT2VHXF45","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"pith_short_8","alias_value":"NBIUDY7L","created_at":"2026-07-05T09:08:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:NBIUDY7LT2VHXF45N4SZEFQX6I","target":"record","payload":{"canonical_record":{"source":{"id":"2405.05451","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-05-08T23:00:02Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"2fc5243846bf3057799f481abc582e2b0e217ea7cb957326ee405db52bdcdaf0","abstract_canon_sha256":"361697bd62c43c4751ec44b3c2fa01abefdeebddebc1acd0fcbf1c33625598dc"},"schema_version":"1.0"},"canonical_sha256":"685141e3eb9eaa7b979d6f25921617f23654d5b99411b7054b3d5f29fc889648","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:08:25.496891Z","signature_b64":"3h2ZuommTSL/vS3oJaT+0lQAI2586IoHiO3Fbnou4UevGINeaNsy5StqUn67UbnxzgvY8PrTLiLUFhshxTxICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"685141e3eb9eaa7b979d6f25921617f23654d5b99411b7054b3d5f29fc889648","last_reissued_at":"2026-07-05T09:08:25.496268Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:08:25.496268Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2405.05451","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:08:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ii0GaWB8tikArdzIqwXGx66Ua6uG4TDisvDpds2Y6ut2p4JQVfwNkkyr466JuJgiCtxvC2Ub5sr1b5TRWr5uCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T16:54:58.568383Z"},"content_sha256":"6767a94130c9e727c088a2df7a4ba82982a0fca70609b96dc5dc296e24247fc0","schema_version":"1.0","event_id":"sha256:6767a94130c9e727c088a2df7a4ba82982a0fca70609b96dc5dc296e24247fc0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:NBIUDY7LT2VHXF45N4SZEFQX6I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.supr-con","authors_text":"Derek Fujimoto, Edward Thoeng, Gerald D. Morris, John O. Ticknor, Md. Asaduzzaman, Philipp Kolb, Robert E. Laxdal, Robert F. Kiefl, Ruohong Li, Ryan M. L. McFadden, Sarah R. Dunsiger, Suresh Saminathan, Tobias Junginger, Victoria L. Karner, W. Andrew MacFarlane","submitted_at":"2024-05-08T23:00:02Z","abstract_excerpt":"We report direct measurements of the magnetic field screening at the limits of the Meissner phase for two superconducting Nb samples. The samples are processed with two different surface treatments that have been developed for superconducting radio-frequency cavity applications -- a \"baseline\" treatment and an oxygen-doping (\"O-doping\") treatment. The measurements show: 1) that the screening length is significantly longer in the \"O-doping\" sample compared to the \"baseline\" sample; 2) that the screening length near the limits of the Meissner phase increases with applied field; 3) the evolution "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.05451","kind":"arxiv","version":1},"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/2405.05451/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":"2026-07-05T09:08:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aQc32WsNa1dP1CHegGfc68P+Xp4aFMxAKuubXJfAYoPxf+nzHsmHna8yYMnybQBrv8NPeR9U+wZR+Es3KJ4zDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T16:54:58.568950Z"},"content_sha256":"1a8016a9ddaa80fdd9a0000e9d99f48dca659a2f837d229024fd332f9095409a","schema_version":"1.0","event_id":"sha256:1a8016a9ddaa80fdd9a0000e9d99f48dca659a2f837d229024fd332f9095409a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NBIUDY7LT2VHXF45N4SZEFQX6I/bundle.json","state_url":"https://pith.science/pith/NBIUDY7LT2VHXF45N4SZEFQX6I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NBIUDY7LT2VHXF45N4SZEFQX6I/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":"2026-08-21T16:54:58Z","links":{"resolver":"https://pith.science/pith/NBIUDY7LT2VHXF45N4SZEFQX6I","bundle":"https://pith.science/pith/NBIUDY7LT2VHXF45N4SZEFQX6I/bundle.json","state":"https://pith.science/pith/NBIUDY7LT2VHXF45N4SZEFQX6I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NBIUDY7LT2VHXF45N4SZEFQX6I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:NBIUDY7LT2VHXF45N4SZEFQX6I","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":"361697bd62c43c4751ec44b3c2fa01abefdeebddebc1acd0fcbf1c33625598dc","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-05-08T23:00:02Z","title_canon_sha256":"2fc5243846bf3057799f481abc582e2b0e217ea7cb957326ee405db52bdcdaf0"},"schema_version":"1.0","source":{"id":"2405.05451","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.05451","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"arxiv_version","alias_value":"2405.05451v1","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.05451","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"pith_short_12","alias_value":"NBIUDY7LT2VH","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"pith_short_16","alias_value":"NBIUDY7LT2VHXF45","created_at":"2026-07-05T09:08:25Z"},{"alias_kind":"pith_short_8","alias_value":"NBIUDY7L","created_at":"2026-07-05T09:08:25Z"}],"graph_snapshots":[{"event_id":"sha256:1a8016a9ddaa80fdd9a0000e9d99f48dca659a2f837d229024fd332f9095409a","target":"graph","created_at":"2026-07-05T09:08:25Z","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/2405.05451/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report direct measurements of the magnetic field screening at the limits of the Meissner phase for two superconducting Nb samples. The samples are processed with two different surface treatments that have been developed for superconducting radio-frequency cavity applications -- a \"baseline\" treatment and an oxygen-doping (\"O-doping\") treatment. The measurements show: 1) that the screening length is significantly longer in the \"O-doping\" sample compared to the \"baseline\" sample; 2) that the screening length near the limits of the Meissner phase increases with applied field; 3) the evolution ","authors_text":"Derek Fujimoto, Edward Thoeng, Gerald D. Morris, John O. Ticknor, Md. Asaduzzaman, Philipp Kolb, Robert E. Laxdal, Robert F. Kiefl, Ruohong Li, Ryan M. L. McFadden, Sarah R. Dunsiger, Suresh Saminathan, Tobias Junginger, Victoria L. Karner, W. Andrew MacFarlane","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-05-08T23:00:02Z","title":"Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.05451","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":"sha256:6767a94130c9e727c088a2df7a4ba82982a0fca70609b96dc5dc296e24247fc0","target":"record","created_at":"2026-07-05T09:08:25Z","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":"361697bd62c43c4751ec44b3c2fa01abefdeebddebc1acd0fcbf1c33625598dc","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-05-08T23:00:02Z","title_canon_sha256":"2fc5243846bf3057799f481abc582e2b0e217ea7cb957326ee405db52bdcdaf0"},"schema_version":"1.0","source":{"id":"2405.05451","kind":"arxiv","version":1}},"canonical_sha256":"685141e3eb9eaa7b979d6f25921617f23654d5b99411b7054b3d5f29fc889648","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"685141e3eb9eaa7b979d6f25921617f23654d5b99411b7054b3d5f29fc889648","first_computed_at":"2026-07-05T09:08:25.496268Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:08:25.496268Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3h2ZuommTSL/vS3oJaT+0lQAI2586IoHiO3Fbnou4UevGINeaNsy5StqUn67UbnxzgvY8PrTLiLUFhshxTxICQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:08:25.496891Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.05451","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6767a94130c9e727c088a2df7a4ba82982a0fca70609b96dc5dc296e24247fc0","sha256:1a8016a9ddaa80fdd9a0000e9d99f48dca659a2f837d229024fd332f9095409a"],"state_sha256":"c714822178ca448c1fa3168bf0f47b49750577daa46ff79385aa31c076baf918"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cxon8vSPbtpTal5SYlT1WPPUZrnvNMdBKXds/2Q+gQj4QGyIf35tbBmg97Hlu+c51L3syqVeEXXXp4SpS3f0BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T16:54:58.574026Z","bundle_sha256":"852f78837bd2b111e6715c9d34e135497d5f1fda773539aad735279bd855bc91"}}