{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:JDIPEWUYS6XA2ONGE5BBWIEBPD","short_pith_number":"pith:JDIPEWUY","canonical_record":{"source":{"id":"1304.4516","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-04-16T16:41:43Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"f1d8b06fc1ef7024f344587a607a547ccb3e721e4d4cd9eedad119814e9735e7","abstract_canon_sha256":"7c6b3788205e729ac2c929c503c53fbdaf547be09c670f83432bfffef90f5ee5"},"schema_version":"1.0"},"canonical_sha256":"48d0f25a9897ae0d39a627421b208178c1dd83914bc5c5da659cd019fc643046","source":{"kind":"arxiv","id":"1304.4516","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.4516","created_at":"2026-05-18T01:50:32Z"},{"alias_kind":"arxiv_version","alias_value":"1304.4516v1","created_at":"2026-05-18T01:50:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4516","created_at":"2026-05-18T01:50:32Z"},{"alias_kind":"pith_short_12","alias_value":"JDIPEWUYS6XA","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JDIPEWUYS6XA2ONG","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JDIPEWUY","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:JDIPEWUYS6XA2ONGE5BBWIEBPD","target":"record","payload":{"canonical_record":{"source":{"id":"1304.4516","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-04-16T16:41:43Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"f1d8b06fc1ef7024f344587a607a547ccb3e721e4d4cd9eedad119814e9735e7","abstract_canon_sha256":"7c6b3788205e729ac2c929c503c53fbdaf547be09c670f83432bfffef90f5ee5"},"schema_version":"1.0"},"canonical_sha256":"48d0f25a9897ae0d39a627421b208178c1dd83914bc5c5da659cd019fc643046","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:32.166109Z","signature_b64":"IDPAHNB8aiFHNFzfKGKNAwTXXf4ytm1gJzVJwYdFMk9cajDRfu+pQiK9AB8nO59C0bYyUlT3LIWstmlr41ZwAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48d0f25a9897ae0d39a627421b208178c1dd83914bc5c5da659cd019fc643046","last_reissued_at":"2026-05-18T01:50:32.165570Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:32.165570Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.4516","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":"2026-05-18T01:50:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z/qx0xc+xeaWQkWT+9++IEDpiRhYFroV597wkkUvQZbtbnjNTWNaCXh7N9jHZqiT8epIC96f8ppvh7/f/MSgCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:06:59.882153Z"},"content_sha256":"282d117a845c2d07c76344c4ee3c47b63f7337ed8fe4bb94b788d6d1cd92f575","schema_version":"1.0","event_id":"sha256:282d117a845c2d07c76344c4ee3c47b63f7337ed8fe4bb94b788d6d1cd92f575"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:JDIPEWUYS6XA2ONGE5BBWIEBPD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dependence of the microwave surface resistance of superconducting niobium on the magnitude of the rf field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.acc-ph"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Grassellino, A. Romanenko","submitted_at":"2013-04-16T16:41:43Z","abstract_excerpt":"Utilizing difference in temperature dependencies we decoupled BCS and residual components of the microwave surface resistance of superconducting niobium at all rf fields up to $B_\\mathrm{rf}\\sim110$ mT. We reveal that the residual resistance decreases with field at $B_\\mathrm{rf} \\lesssim$ 40 mT and strongly increases in chemically treated niobium at $B_\\mathrm{rf} > 80$ mT. We find that BCS surface resistance is weakly dependent on field in the clean limit, whereas a strong and peculiar field dependence emerges after $120^\\circ$C vacuum baking."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4516","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":""},"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":"2026-05-18T01:50:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Iv8u/1V5RSGy0U5u8B8/05P3n4+DinuBWeMTGggf4lNl2I5tDzHHnQciL9p2ooVCjHDHSAJfwZVEV4KtwQCDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:06:59.882525Z"},"content_sha256":"72dabb4ad664dff782e8b2e859b831b5be89257737eaeeb189bcf114edd0ee4d","schema_version":"1.0","event_id":"sha256:72dabb4ad664dff782e8b2e859b831b5be89257737eaeeb189bcf114edd0ee4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD/bundle.json","state_url":"https://pith.science/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD/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":"2026-06-02T23:06:59Z","links":{"resolver":"https://pith.science/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD","bundle":"https://pith.science/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD/bundle.json","state":"https://pith.science/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JDIPEWUYS6XA2ONGE5BBWIEBPD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:JDIPEWUYS6XA2ONGE5BBWIEBPD","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":"7c6b3788205e729ac2c929c503c53fbdaf547be09c670f83432bfffef90f5ee5","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-04-16T16:41:43Z","title_canon_sha256":"f1d8b06fc1ef7024f344587a607a547ccb3e721e4d4cd9eedad119814e9735e7"},"schema_version":"1.0","source":{"id":"1304.4516","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.4516","created_at":"2026-05-18T01:50:32Z"},{"alias_kind":"arxiv_version","alias_value":"1304.4516v1","created_at":"2026-05-18T01:50:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4516","created_at":"2026-05-18T01:50:32Z"},{"alias_kind":"pith_short_12","alias_value":"JDIPEWUYS6XA","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JDIPEWUYS6XA2ONG","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JDIPEWUY","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:72dabb4ad664dff782e8b2e859b831b5be89257737eaeeb189bcf114edd0ee4d","target":"graph","created_at":"2026-05-18T01:50:32Z","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":"Utilizing difference in temperature dependencies we decoupled BCS and residual components of the microwave surface resistance of superconducting niobium at all rf fields up to $B_\\mathrm{rf}\\sim110$ mT. We reveal that the residual resistance decreases with field at $B_\\mathrm{rf} \\lesssim$ 40 mT and strongly increases in chemically treated niobium at $B_\\mathrm{rf} > 80$ mT. We find that BCS surface resistance is weakly dependent on field in the clean limit, whereas a strong and peculiar field dependence emerges after $120^\\circ$C vacuum baking.","authors_text":"A. Grassellino, A. Romanenko","cross_cats":["physics.acc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-04-16T16:41:43Z","title":"Dependence of the microwave surface resistance of superconducting niobium on the magnitude of the rf field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4516","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":"sha256:282d117a845c2d07c76344c4ee3c47b63f7337ed8fe4bb94b788d6d1cd92f575","target":"record","created_at":"2026-05-18T01:50:32Z","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":"7c6b3788205e729ac2c929c503c53fbdaf547be09c670f83432bfffef90f5ee5","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-04-16T16:41:43Z","title_canon_sha256":"f1d8b06fc1ef7024f344587a607a547ccb3e721e4d4cd9eedad119814e9735e7"},"schema_version":"1.0","source":{"id":"1304.4516","kind":"arxiv","version":1}},"canonical_sha256":"48d0f25a9897ae0d39a627421b208178c1dd83914bc5c5da659cd019fc643046","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48d0f25a9897ae0d39a627421b208178c1dd83914bc5c5da659cd019fc643046","first_computed_at":"2026-05-18T01:50:32.165570Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:32.165570Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IDPAHNB8aiFHNFzfKGKNAwTXXf4ytm1gJzVJwYdFMk9cajDRfu+pQiK9AB8nO59C0bYyUlT3LIWstmlr41ZwAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:32.166109Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.4516","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:282d117a845c2d07c76344c4ee3c47b63f7337ed8fe4bb94b788d6d1cd92f575","sha256:72dabb4ad664dff782e8b2e859b831b5be89257737eaeeb189bcf114edd0ee4d"],"state_sha256":"ba8b1badcad8cc4e7fa5ef01a8e4af3121d539f0e4c021b7b9a9e02f4de234cf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4CLAZNK1rJ88c1pgsaNUwFBw822qxXrkpzr5DKo7FQ3ZkSgAT/4MkIA4H2YoxCW2kKvoa5zNEo1I5jaIpPteAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:06:59.884485Z","bundle_sha256":"6e2db208f1698d9dd07eced5361110d4fcb546260a9908004dd99872ed5477e9"}}