{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:NRCHVKKXU7EFC3WC267W6UGPXC","short_pith_number":"pith:NRCHVKKX","schema_version":"1.0","canonical_sha256":"6c447aa957a7c8516ec2d7bf6f50cfb8b31e1ae25d7e5bb2c9450dc0976cdc0e","source":{"kind":"arxiv","id":"1311.7153","version":1},"attestation_state":"computed","paper":{"title":"Strong Meissner screening change in superconducting radio frequency cavities due to mild baking","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, A. Suter, F. Barkov, T. Prokscha, Z. Salman","submitted_at":"2013-11-27T21:02:20Z","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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1311.7153","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-11-27T21:02:20Z","cross_cats_sorted":["physics.acc-ph"],"title_canon_sha256":"45e74bf36ce7ee1e6dc9901cfacbdb4038698cd5cad592a834cea37720398a6b","abstract_canon_sha256":"4e6dd588cea65e29f5f8649a4b7644c1ed7a216c4d85dfcf93d3f64e84475050"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:57:17.202694Z","signature_b64":"Rxq2Q0WZ7eVYt/T2tEaUelh6GDGkSIJIaSCSTFYOWj9F2t5y3GU17CxqydigFrWqRX50au3G8eQQNhdsE4y1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c447aa957a7c8516ec2d7bf6f50cfb8b31e1ae25d7e5bb2c9450dc0976cdc0e","last_reissued_at":"2026-05-18T02:57:17.202305Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:57:17.202305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Strong Meissner screening change in superconducting radio frequency cavities due to mild baking","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, A. Suter, F. Barkov, T. Prokscha, Z. Salman","submitted_at":"2013-11-27T21:02:20Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.7153","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1311.7153","created_at":"2026-05-18T02:57:17.202369+00:00"},{"alias_kind":"arxiv_version","alias_value":"1311.7153v1","created_at":"2026-05-18T02:57:17.202369+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.7153","created_at":"2026-05-18T02:57:17.202369+00:00"},{"alias_kind":"pith_short_12","alias_value":"NRCHVKKXU7EF","created_at":"2026-05-18T12:27:52.871228+00:00"},{"alias_kind":"pith_short_16","alias_value":"NRCHVKKXU7EFC3WC","created_at":"2026-05-18T12:27:52.871228+00:00"},{"alias_kind":"pith_short_8","alias_value":"NRCHVKKX","created_at":"2026-05-18T12:27:52.871228+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC","json":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC.json","graph_json":"https://pith.science/api/pith-number/NRCHVKKXU7EFC3WC267W6UGPXC/graph.json","events_json":"https://pith.science/api/pith-number/NRCHVKKXU7EFC3WC267W6UGPXC/events.json","paper":"https://pith.science/paper/NRCHVKKX"},"agent_actions":{"view_html":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC","download_json":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC.json","view_paper":"https://pith.science/paper/NRCHVKKX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1311.7153&json=true","fetch_graph":"https://pith.science/api/pith-number/NRCHVKKXU7EFC3WC267W6UGPXC/graph.json","fetch_events":"https://pith.science/api/pith-number/NRCHVKKXU7EFC3WC267W6UGPXC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC/action/storage_attestation","attest_author":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC/action/author_attestation","sign_citation":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC/action/citation_signature","submit_replication":"https://pith.science/pith/NRCHVKKXU7EFC3WC267W6UGPXC/action/replication_record"}},"created_at":"2026-05-18T02:57:17.202369+00:00","updated_at":"2026-05-18T02:57:17.202369+00:00"}