{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"84c34d51c0cee7b11200f15abd0bd7c49b36301c627e56a39d2636f75bd7c710","created":"2026-10-03T07:17:52Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"55940daf259fd2f95ddc0464461d4cff0563d210361149874437440d1570bae8","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"plasma.stellarator-optimization","field":"plasma","n":"1","review_cite":"M. Landreman, E. Paul, Magnetic fields with precise quasisymmetry for plasma confinement, Physical Review Letters, 2022","review_link":"https://arxiv.org/abs/2108.03711","review_verified":"true","summary":"A stellarator holds plasma with twisted external magnets instead of a plasma current, so it cannot disrupt, but its 3D shape lets particles drift out unless the field is very carefully designed. Computer optimization now finds excellent shapes, and the open question is how many goals can be met together with buildable magnets.","title":"Limits of stellarator optimization","topic_ref":null,"why":"Stellarators are a leading steady-state reactor concept, and their design is now limited by optimization trade-offs."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"ea827242773f8b9fc91ff7ca2acb740fcd017fdea46fc2cbf3a53387d9b527bc","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"806db1e5e9ea56a87b85b8f66ae326fa98f51cfbfd267ad34ff21c16551c972f","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"QtIZ-dRi3SvUxyk5lzXLGP6d1u0oq8t5xf9rrU1uH0kRVO7_wJmwKphJmrMZYTwLFS-uAEhqowuUnzQBYiw2Aw"},"schema":"pubphys.envelope/1"},"record_hash":"ea827242773f8b9fc91ff7ca2acb740fcd017fdea46fc2cbf3a53387d9b527bc","leaf_index":307}