{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:NRCHVKKXU7EFC3WC267W6UGPXC","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":"4e6dd588cea65e29f5f8649a4b7644c1ed7a216c4d85dfcf93d3f64e84475050","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-27T21:02:20Z","title_canon_sha256":"45e74bf36ce7ee1e6dc9901cfacbdb4038698cd5cad592a834cea37720398a6b"},"schema_version":"1.0","source":{"id":"1311.7153","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.7153","created_at":"2026-05-18T02:57:17Z"},{"alias_kind":"arxiv_version","alias_value":"1311.7153v1","created_at":"2026-05-18T02:57:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.7153","created_at":"2026-05-18T02:57:17Z"},{"alias_kind":"pith_short_12","alias_value":"NRCHVKKXU7EF","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"NRCHVKKXU7EFC3WC","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"NRCHVKKX","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:6971b5a93ebac87cad7cef8819944daad18dcbd0208831336ada2a851e91301f","target":"graph","created_at":"2026-05-18T02:57:17Z","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":"We investigate \"hot\" regions with anomalous high field dissipation in bulk niobium superconducting radio frequency cavities for particle accelerators by using low energy muon spin rotation (LE-$\\mu$SR) on corresponding cavity cutouts. We demonstrate that superconducting properties at the hot region are well described by the non-local Pippard/BCS model for niobium in the clean limit with a London penetration depth $\\lambda_\\mathrm{L} = 23 \\pm 2$ nm. In contrast, a cutout sample from the 120$^\\circ$C baked cavity shows a much larger $\\lambda > 100$ nm and a depth dependent mean free path, likely","authors_text":"A. Grassellino, A. Romanenko, A. Suter, F. Barkov, T. Prokscha, Z. Salman","cross_cats":["physics.acc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-27T21:02:20Z","title":"Strong Meissner screening change in superconducting radio frequency cavities due to mild baking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.7153","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:b06266afbd05777373770fbcf9462e1f064e050c6e72c2d08beab5aeabf00d44","target":"record","created_at":"2026-05-18T02:57:17Z","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":"4e6dd588cea65e29f5f8649a4b7644c1ed7a216c4d85dfcf93d3f64e84475050","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-27T21:02:20Z","title_canon_sha256":"45e74bf36ce7ee1e6dc9901cfacbdb4038698cd5cad592a834cea37720398a6b"},"schema_version":"1.0","source":{"id":"1311.7153","kind":"arxiv","version":1}},"canonical_sha256":"6c447aa957a7c8516ec2d7bf6f50cfb8b31e1ae25d7e5bb2c9450dc0976cdc0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c447aa957a7c8516ec2d7bf6f50cfb8b31e1ae25d7e5bb2c9450dc0976cdc0e","first_computed_at":"2026-05-18T02:57:17.202305Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:57:17.202305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rxq2Q0WZ7eVYt/T2tEaUelh6GDGkSIJIaSCSTFYOWj9F2t5y3GU17CxqydigFrWqRX50au3G8eQQNhdsE4y1Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:57:17.202694Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.7153","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b06266afbd05777373770fbcf9462e1f064e050c6e72c2d08beab5aeabf00d44","sha256:6971b5a93ebac87cad7cef8819944daad18dcbd0208831336ada2a851e91301f"],"state_sha256":"d706595784a041da3e09e9405c9642b6fa558c5a008cd11b0aa9d41f4242b9d4"}