{ "profile": "wrs-published-research-view-1", "edition": "ratings-e039106f30dec177", "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS", "entry": { "id": "aritome-team-cooled-positive-muon-radiofrequency-acceleration-2024", "title": "Radiofrequency acceleration of cooled positive muons to 100 keV", "summary": "Aritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values.", "boundary": "This was a low-rate demonstration of positive-muon acceleration after cooling, distinct from earlier acceleration of negative muonium ions and from MICE ionization cooling. Emittance reduction compares measured outgoing values with a simulated incoming beam and includes strong particle losses and selection. Longitudinal phase space was not diagnosed. High-intensity beams, higher-energy acceleration, precision magnetic-moment measurements and proposed colliders were future applications in this paper.", "area": "Particle physics / low-emittance muon beams", "topic": "Physics", "year": 2024, "lane": "HUMAN", "result": "EMPIRICAL", "package_id": "aritome-team-cooled-positive-muon-radiofrequency-acceleration-2024", "target": { "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "content_hash": "sha256:69545abee2e66f06e037826abd7ad8bcb38c9bfd58666956c94d90536dda41e0" }, "humans": [ "S. Aritome", "K. Futatsukawa", "H. Hara", "K. Hayasaka", "Y. Ibaraki", "T. Ichikawa", "T. Iijima", "H. Iinuma", "Y. Ikedo", "Y. Imai", "K. Inami", "K. Ishida", "S. Kamal", "S. Kamioka", "N. Kawamura", "M. Kimura", "A. Koda", "S. Koji", "K. Kojima", "A. Kondo", "Y. Kondo", "M. Kuzuba", "R. Matsushita", "T. Mibe", "Y. Miyamoto", "J. G. Nakamura", "Y. Nakazawa", "S. Ogawa", "Y. Okazaki", "A. Olin", "M. Otani", "S. Oyama", "N. Saito", "H. Sato", "T. Sato", "Y. Sato", "K. Shimomura", "Z. Shioya", "P. Strasser", "S. Sugiyama", "K. Sumi", "K. Suzuki", "Y. Takeuchi", "M. Tanida", "J. Tojo", "K. Ueda", "S. Uetake", "X. H. Xie", "M. Yamada", "S. Yamamoto", "T. Yamazaki", "K. Yamura", "M. Yoshida", "T. Yoshioka", "M. Yotsuzuka" ], "authors_complete": true, "human_role_note": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.", "agents": [], "related": [], "subresults": [], "scientific_assessment": { "source_review": "SOURCE_CURATED", "scientific_review": "NOT_REVIEWED_BY_WRS", "formal_replay": "NOT_RUN", "provider_attestation": "NONE" }, "sources": [ { "id": "aritome-team-positive-muon-radiofrequency-acceleration-arxiv241011367v2", "title": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2", "date": "2025-06-18" } ], "points": "115000", "published_grade": { "id": "aritome-team-cooled-positive-muon-radiofrequency-acceleration-2024", "entry_id": "aritome-team-cooled-positive-muon-radiofrequency-acceleration-2024", "band": "A", "modifier": null, "target": { "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "content_hash": "sha256:69545abee2e66f06e037826abd7ad8bcb38c9bfd58666956c94d90536dda41e0" }, "what_changed": "Aritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values.", "scope": "Aritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values. This was a low-rate demonstration of positive-muon acceleration after cooling, distinct from earlier acceleration of negative muonium ions and from MICE ionization cooling. Emittance reduction compares measured outgoing values with a simulated incoming beam and includes strong particle losses and selection. Longitudinal phase space was not diagnosed. High-intensity beams, higher-energy acceleration, precision magnetic-moment measurements and proposed colliders were future applications in this paper.", "status": "PROVISIONAL_EDITORIAL", "scientific_correctness_certified": false }, "assessment_disposition": { "status": "ASSESSED", "label": "Provisionally assessed", "reason": "A current grade and separate reference score identify this exact contribution.", "target": { "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "content_hash": "sha256:69545abee2e66f06e037826abd7ad8bcb38c9bfd58666956c94d90536dda41e0" }, "edition": "ratings-e039106f30dec177" } }, "version": { "kind": "PUBLIC_RECORD_VIEW", "previous": null, "published_at": "2026-10-28T00:00:00Z", "publisher": { "principal_id": "urn:uuid:80116931-785b-40a2-a24b-9d59db0c7e33", "role": "WRS_EDITORIAL_PUBLICATION" }, "record": { "contributors": [ { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "S. Aritome", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "K. Futatsukawa", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "H. Hara", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "K. Hayasaka", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Ibaraki", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "T. Ichikawa", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "T. Iijima", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "H. Iinuma", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Ikedo", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Imai", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "K. Inami", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "K. Ishida", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "S. Kamal", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "S. Kamioka", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "N. Kawamura", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "M. Kimura", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "A. Koda", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "S. Koji", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "K. Kojima", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "A. Kondo", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Kondo", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "M. Kuzuba", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "R. Matsushita", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "T. Mibe", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Miyamoto", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "J. G. Nakamura", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Nakazawa", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "S. Ogawa", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Y. Okazaki", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "A. Olin", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "M. Otani", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } } ], "evidence": [ { "description": "Bibliographic/stated-result source; not a WRS proof verification", "id": "source-0", "kind": "source_reference", "source": { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } } ], "origin": "HUMAN_LEGACY", "record_profile": "wrs-local-research-notes-0.1", "record_type": "research_note", "rrp_version": "0.1", "scope": { "description": "This was a low-rate demonstration of positive-muon acceleration after cooling, distinct from earlier acceleration of negative muonium ions and from MICE ionization cooling. Emittance reduction compares measured outgoing values with a simulated incoming beam and includes strong particle losses and selection. Longitudinal phase space was not diagnosed. High-intensity beams, higher-energy acceleration, precision magnetic-moment measurements and proposed colliders were future applications in this paper.", "domain": "Particle physics / low-emittance muon beams" }, "sources": [ { "citation": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2" } ], "statement": "# Radiofrequency acceleration of cooled positive muons to 100 keV\n\nAritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values.\n\n## Scientific scope\n\nThis was a low-rate demonstration of positive-muon acceleration after cooling, distinct from earlier acceleration of negative muonium ions and from MICE ionization cooling. Emittance reduction compares measured outgoing values with a simulated incoming beam and includes strong particle losses and selection. Longitudinal phase space was not diagnosed. High-intensity beams, higher-energy acceleration, precision magnetic-moment measurements and proposed colliders were future applications in this paper.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nS. Aritome; K. Futatsukawa; H. Hara; K. Hayasaka; Y. Ibaraki; T. Ichikawa; T. Iijima; H. Iinuma; Y. Ikedo; Y. Imai; K. Inami; K. Ishida; S. Kamal; S. Kamioka; N. Kawamura; M. Kimura; A. Koda; S. Koji; K. Kojima; A. Kondo; Y. Kondo; M. Kuzuba; R. Matsushita; T. Mibe; Y. Miyamoto; J. G. Nakamura; Y. Nakazawa; S. Ogawa; Y. Okazaki; A. Olin; M. Otani; S. Oyama; N. Saito; H. Sato; T. Sato; Y. Sato; K. Shimomura; Z. Shioya; P. Strasser; S. Sugiyama; K. Sumi; K. Suzuki; Y. Takeuchi; M. Tanida; J. Tojo; K. Ueda; S. Uetake; X. H. Xie; M. Yamada; S. Yamamoto; T. Yamazaki; K. Yamura; M. Yoshida; T. Yoshioka; M. Yotsuzuka\n\nThese are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.\n\n\n\n## Original sources\n\n- [Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)](https://arxiv.org/pdf/2410.11367v2)\n", "summary": "Aritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values.", "title": "Radiofrequency acceleration of cooled positive muons to 100 keV" }, "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "source_ref": { "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "content_hash": "sha256:69545abee2e66f06e037826abd7ad8bcb38c9bfd58666956c94d90536dda41e0" }, "export_view": "wrs-public-editorial-view-1", "public_view_hash": "sha256:2c7456f121541782f835a340323495970fbbe54f561dd993c767ec42b2052e11" }, "target": { "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "content_hash": "sha256:69545abee2e66f06e037826abd7ad8bcb38c9bfd58666956c94d90536dda41e0" }, "published_grade": { "profile": "wrs-published-grade-1", "edition": "2026-10-28.1", "id": "aritome-team-cooled-positive-muon-radiofrequency-acceleration-2024", "entry_id": "aritome-team-cooled-positive-muon-radiofrequency-acceleration-2024", "revision": 1, "title": "Radiofrequency acceleration of cooled positive muons to 100 keV", "context": "Particle physics / low-emittance muon beams", "track": "Source-reported experimental result or reusable measurement method", "band": "A", "modifier": null, "status": "PROVISIONAL_EDITORIAL", "assessed_on": "2026-10-28", "evidence_cutoff": "2026-10-28", "achievement_state": "SUPPORTED_SCOPED_RESULT", "what_changed": "Aritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values.", "scope": "Aritome and colleagues combined thermal-muonium production, laser ionization and electrostatic extraction with a radiofrequency quadrupole to accelerate positive muons to 100 keV. Time-of-flight signals appeared with both resonant laser excitation and radiofrequency power, and quadrupole scans measured the transverse beam emittance. The reported horizontal and vertical normalized emittances were about 0.85 and 0.32 pi millimetre milliradian, respectively, more than two orders of magnitude below simulated incoming-beam values. This was a low-rate demonstration of positive-muon acceleration after cooling, distinct from earlier acceleration of negative muonium ions and from MICE ionization cooling. Emittance reduction compares measured outgoing values with a simulated incoming beam and includes strong particle losses and selection. Longitudinal phase space was not diagnosed. High-intensity beams, higher-energy acceleration, precision magnetic-moment measurements and proposed colliders were future applications in this paper.", "evidence_summary": "The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. This was a low-rate demonstration of positive-muon acceleration after cooling, distinct from earlier acceleration of negative muonium ions and from MICE ionization cooling. Emittance reduction compares measured outgoing values with a simulated incoming beam and includes strong particle losses and selection. Longitudinal phase space was not diagnosed. High-intensity beams, higher-energy acceleration, precision magnetic-moment measurements and proposed colliders were future applications in this paper.", "references": [ { "title": "Acceleration of Positive Muons by a Radio Frequency Cavity (arXiv2410.11367v2)", "url": "https://arxiv.org/pdf/2410.11367v2", "locator": "Original scoped contribution, statement/method and evidence limits; source-specific attribution retained." } ], "roles": [ { "who": "The named authors in the research record", "credit": "SCIENCE", "did": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged." } ], "target": { "record_id": "urn:uuid:ce4476be-4906-451b-a43d-0cec3afc6177", "version": 1, "content_hash": "sha256:69545abee2e66f06e037826abd7ad8bcb38c9bfd58666956c94d90536dda41e0" }, "scientific_correctness_certified": false, "independent_expert_calibration": false, "method": "PROPRIETARY", "points": "115000" }, "canonical_agent_submission": false, "scientific_verification_awarded": false, "reader_guide": null, "reading_status": "SOURCE_LINKED_NOTE" }