{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"3840c8a08f8fa6fd8e2ec8e83ec8ec8b19148e1d3c7356503c01dc5431c6a908","created":"2026-10-03T07:17:50Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"8e1ad10c6d4a8d98b61b2906fce9795ebd54fb558894f84dc3af9cf1222fa17b","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"beams.muon-ionization-cooling","field":"beams","n":"1","review_cite":"MICE collaboration, Demonstration of cooling by the Muon Ionization Cooling Experiment, Nature, 2020","review_link":"https://doi.org/10.1038/s41586-020-1958-9","review_verified":"true","summary":"Muons live only two microseconds, so a muon beam must be shrunk very fast by passing it through matter that slows it down and then re-accelerating it. Doing this in all six position and momentum directions down to collider size has never been done.","title":"Six-dimensional ionization cooling of muons","topic_ref":null,"why":"Six-dimensional cooling is the main unproven step toward a multi-TeV muon collider."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"cf06ea9df973fe3a057c03ab62554e74eaac4ddf41416780bfff92f0d24ef951","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"0be1b9ff9c2baff7dea5c28f981a39dfc73901cb335bfeafd4c34bce99f730d4","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"BXYhuSCvD9tKrthj95KOpl9KloxXUi7cdl7f4ZAMM_9FQHH5YZaRZuCgWnonZeYRqqR-8PiAeaPe0XczzJXhDQ"},"schema":"pubphys.envelope/1"},"record_hash":"cf06ea9df973fe3a057c03ab62554e74eaac4ddf41416780bfff92f0d24ef951","leaf_index":68}