{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:A2LHFD5V2CJZSU7PKZAG7RAQIT","short_pith_number":"pith:A2LHFD5V","canonical_record":{"source":{"id":"2312.06529","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2023-12-11T17:05:58Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.supr-con"],"title_canon_sha256":"2c5cd6e34cc9e497d725ca7b56d26e54edc458d59aa8c9d7631aa16224b6e5e3","abstract_canon_sha256":"384afb7e8b308a9ba3d44779cb3c4364dfa9269e5c379ed1d7321b8e9006b4bd"},"schema_version":"1.0"},"canonical_sha256":"0696728fb5d0939953ef56406fc41044d58d2c2a72f73bea913be986744a09bf","source":{"kind":"arxiv","id":"2312.06529","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2312.06529","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"arxiv_version","alias_value":"2312.06529v2","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2312.06529","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"pith_short_12","alias_value":"A2LHFD5V2CJZ","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"pith_short_16","alias_value":"A2LHFD5V2CJZSU7P","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"pith_short_8","alias_value":"A2LHFD5V","created_at":"2026-07-05T09:53:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:A2LHFD5V2CJZSU7PKZAG7RAQIT","target":"record","payload":{"canonical_record":{"source":{"id":"2312.06529","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2023-12-11T17:05:58Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.supr-con"],"title_canon_sha256":"2c5cd6e34cc9e497d725ca7b56d26e54edc458d59aa8c9d7631aa16224b6e5e3","abstract_canon_sha256":"384afb7e8b308a9ba3d44779cb3c4364dfa9269e5c379ed1d7321b8e9006b4bd"},"schema_version":"1.0"},"canonical_sha256":"0696728fb5d0939953ef56406fc41044d58d2c2a72f73bea913be986744a09bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:53:39.716387Z","signature_b64":"dAGVZCA6LlVan5/OECScrc7X5FzFrDj8Fd6w4SGrUHcbbEjueNvQWkAletoRZzU5BN4OTrf9ZooELllN4EbwAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0696728fb5d0939953ef56406fc41044d58d2c2a72f73bea913be986744a09bf","last_reissued_at":"2026-07-05T09:53:39.715880Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:53:39.715880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2312.06529","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":"2026-07-05T09:53:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uVBQ+MPj0YkggvzEd1REAcj5Loaih1eC6TsdXPihhMZ9DN7t01Yk0swRzJp2UIhiuMeV1gxuqqmOpBmoKJSeBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T01:43:59.392401Z"},"content_sha256":"755570a88dbdec99d45ab2ae0f8580d72e82ee9a5fe61dfeb45e462cc8b10129","schema_version":"1.0","event_id":"sha256:755570a88dbdec99d45ab2ae0f8580d72e82ee9a5fe61dfeb45e462cc8b10129"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:A2LHFD5V2CJZSU7PKZAG7RAQIT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"In-situ Synchrotron X-Ray Photoelectron Spectroscopy Study of Medium-Temperature Baking of Niobium for SRF Application","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","cond-mat.supr-con"],"primary_cat":"physics.acc-ph","authors_text":"Alena Prudnikava, Anna Makarova, Dmitry Smirnov, Jens Knobloch, Yegor Tamashevich","submitted_at":"2023-12-11T17:05:58Z","abstract_excerpt":"In the present work the chemical composition of niobium surface upon 200-400 {\\deg}C baking similar to \"medium-temperature baking\" and \"furnace baking\" of cavities is explored in-situ by synchrotron X-ray photoelectron spectroscopy (XPS). Our findings imply that below the critical thickness of $Nb_2O_5$ layer (about 1 nm) niobium starts to interact actively with surface impurities, such as carbon and phosphorus. By studying the kinetics of the native oxide reduction, the activation energy and the rate-constant relation have been determined and used for the calculation of the oxygen-concentrati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2312.06529","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/2312.06529/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":"2026-07-05T09:53:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wPRvlJVoWcM+3zAj/tkomjAqmekxInRrbLJQJ+KIkL4lRls6+cANsPq6NFMQD4PO65SBgy4rLNHIT+ublodNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T01:43:59.392931Z"},"content_sha256":"b29d9dab67ce9230ffceb4e061e03c3367d25d7e604a75877c2e5234b4a24783","schema_version":"1.0","event_id":"sha256:b29d9dab67ce9230ffceb4e061e03c3367d25d7e604a75877c2e5234b4a24783"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT/bundle.json","state_url":"https://pith.science/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT/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":"2026-08-21T01:43:59Z","links":{"resolver":"https://pith.science/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT","bundle":"https://pith.science/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT/bundle.json","state":"https://pith.science/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A2LHFD5V2CJZSU7PKZAG7RAQIT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:A2LHFD5V2CJZSU7PKZAG7RAQIT","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":"384afb7e8b308a9ba3d44779cb3c4364dfa9269e5c379ed1d7321b8e9006b4bd","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2023-12-11T17:05:58Z","title_canon_sha256":"2c5cd6e34cc9e497d725ca7b56d26e54edc458d59aa8c9d7631aa16224b6e5e3"},"schema_version":"1.0","source":{"id":"2312.06529","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2312.06529","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"arxiv_version","alias_value":"2312.06529v2","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2312.06529","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"pith_short_12","alias_value":"A2LHFD5V2CJZ","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"pith_short_16","alias_value":"A2LHFD5V2CJZSU7P","created_at":"2026-07-05T09:53:39Z"},{"alias_kind":"pith_short_8","alias_value":"A2LHFD5V","created_at":"2026-07-05T09:53:39Z"}],"graph_snapshots":[{"event_id":"sha256:b29d9dab67ce9230ffceb4e061e03c3367d25d7e604a75877c2e5234b4a24783","target":"graph","created_at":"2026-07-05T09:53:39Z","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/2312.06529/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In the present work the chemical composition of niobium surface upon 200-400 {\\deg}C baking similar to \"medium-temperature baking\" and \"furnace baking\" of cavities is explored in-situ by synchrotron X-ray photoelectron spectroscopy (XPS). Our findings imply that below the critical thickness of $Nb_2O_5$ layer (about 1 nm) niobium starts to interact actively with surface impurities, such as carbon and phosphorus. By studying the kinetics of the native oxide reduction, the activation energy and the rate-constant relation have been determined and used for the calculation of the oxygen-concentrati","authors_text":"Alena Prudnikava, Anna Makarova, Dmitry Smirnov, Jens Knobloch, Yegor Tamashevich","cross_cats":["cond-mat.mtrl-sci","cond-mat.supr-con"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2023-12-11T17:05:58Z","title":"In-situ Synchrotron X-Ray Photoelectron Spectroscopy Study of Medium-Temperature Baking of Niobium for SRF Application"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2312.06529","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":"sha256:755570a88dbdec99d45ab2ae0f8580d72e82ee9a5fe61dfeb45e462cc8b10129","target":"record","created_at":"2026-07-05T09:53:39Z","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":"384afb7e8b308a9ba3d44779cb3c4364dfa9269e5c379ed1d7321b8e9006b4bd","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.supr-con"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.acc-ph","submitted_at":"2023-12-11T17:05:58Z","title_canon_sha256":"2c5cd6e34cc9e497d725ca7b56d26e54edc458d59aa8c9d7631aa16224b6e5e3"},"schema_version":"1.0","source":{"id":"2312.06529","kind":"arxiv","version":2}},"canonical_sha256":"0696728fb5d0939953ef56406fc41044d58d2c2a72f73bea913be986744a09bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0696728fb5d0939953ef56406fc41044d58d2c2a72f73bea913be986744a09bf","first_computed_at":"2026-07-05T09:53:39.715880Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:53:39.715880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dAGVZCA6LlVan5/OECScrc7X5FzFrDj8Fd6w4SGrUHcbbEjueNvQWkAletoRZzU5BN4OTrf9ZooELllN4EbwAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:53:39.716387Z","signed_message":"canonical_sha256_bytes"},"source_id":"2312.06529","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:755570a88dbdec99d45ab2ae0f8580d72e82ee9a5fe61dfeb45e462cc8b10129","sha256:b29d9dab67ce9230ffceb4e061e03c3367d25d7e604a75877c2e5234b4a24783"],"state_sha256":"9c987c0e95f7105c39547b71d3f7f5667709c25d872da3c3d031c8700f253d00"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B/4fGucJCGjwNPZ60npCZuvHTSasKNjbZYqC6Mkn9CVdg3Jxr3u5ox+gjISuzqPZyvk4RGJx2M8ecprgABM/Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T01:43:59.397370Z","bundle_sha256":"0a32619ab32d453de99eee04671cc68a28236eacae1c3dcca81bbf1288f23396"}}