{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"312e5b7111e71a4ee7a0715a42e5697ba0eecb96972df0b775714c75686bc7a6","created":"2026-10-03T07:17:50Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"6427db5d0624ff81373ea84a6ed825a5c531d46695a25b06d3ce0bb3d9d54746","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"beams.nb3sn-cavities","field":"beams","n":"1","review_cite":"S. Posen, D. L. Hall, Nb3Sn superconducting radiofrequency cavities: fabrication, results, properties, and prospects, Superconductor Science and Technology, 2017","review_link":"https://doi.org/10.1088/1361-6668/30/3/033004","review_verified":"true","summary":"Nb3Sn is a superconductor that could work at higher temperature and reach twice the field of niobium. Real Nb3Sn cavities reach well under half of that predicted field, for reasons not fully known.","title":"Performance gap of Nb3Sn cavities","topic_ref":null,"why":"Nb3Sn cavities would allow compact accelerators cooled by simple cryocoolers and higher gradients for large linacs."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"73a350cdcc5f735b0cb472211fcfb487c1e4da9b53f0fa2340cf5e90142abf8f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"866d3bc7137498ac787504508b1b7968629eb163f5bda3aed7a1e1908de845a4","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"JrWOuMrp5UxAThYK0Y1IrQwdozyouT6N_fu7oWfE34vwhgvEJ0qbzRaMjS5oh1TsMQKb-ujZX6HwcxZcihKMDQ"},"schema":"pubphys.envelope/1"},"record_hash":"73a350cdcc5f735b0cb472211fcfb487c1e4da9b53f0fa2340cf5e90142abf8f","leaf_index":69}