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    "title": "Longitudinal and transverse compression of stopped positive muons in helium gas",
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        "date": "2014-02-11"
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        "title": "Demonstration of Muon-Beam Transverse Phase-Space Compression (arXiv2003.11986v2)",
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        "domain": "Particle physics / dissipative muon-beam compression"
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      "statement": "# Longitudinal and transverse compression of stopped positive muons in helium gas\n\nThe muCool team demonstrated separate longitudinal and transverse compression stages for positive muons stopped in helium gas. Bao and colleagues used electric fields to concentrate the stopping distribution along a magnetic field. Antognini and colleagues later used a cryogenic density gradient and crossed fields to obtain transverse convergence. Decay-positron time spectra, control conditions and collision simulations supported both demonstrations. The inferred final sizes and compression times were obtained through those models rather than direct complete beam tomography.\n\n## Scientific scope\n\nThe two experiments tested separate stages under different gas and injection conditions. Their proposed combined ten-order phase-space improvement required subsequent integration, extraction and reacceleration. Small final dimensions, efficiencies and momentum spreads include simulation assumptions, decay losses, detector acceptance and fitted alignment or impurity effects. This family does not establish a completed six-dimensional cooling and acceleration chain or directly measured universal compression factors.\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\nYu Bao; Aldo Antognini; Wilhelm Bertl; Malte Hildebrandt; Kim Siang Khaw; Klaus Kirch; Angela Papa; Claude Petitjean; Florian M. Piegsa; Stefan Ritt; Kamil Sedlak; Alexey Stoykov; David Taqqu; N. J. Ayres; I. Belosevic; V. Bondar; A. Eggenberger; R. Iwai; D. M. Kaplan; A. Knecht; T. J. Phillips; N. Ritjoho; G. Wichmann\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- [Muon cooling: longitudinal compression (arXiv1402.2418v1)](https://arxiv.org/pdf/1402.2418v1)\n- [Demonstration of Muon-Beam Transverse Phase-Space Compression (arXiv2003.11986v2)](https://arxiv.org/pdf/2003.11986v2)\n",
      "summary": "The muCool team demonstrated separate longitudinal and transverse compression stages for positive muons stopped in helium gas. Bao and colleagues used electric fields to concentrate the stopping distribution along a magnetic field. Antognini and colleagues later used a cryogenic density gradient and crossed fields to obtain transverse convergence. Decay-positron time spectra, control conditions and collision simulations supported both demonstrations. The inferred final sizes and compression times were obtained through those models rather than direct complete beam tomography.",
      "title": "Longitudinal and transverse compression of stopped positive muons in helium gas"
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    "title": "Longitudinal and transverse compression of stopped positive muons in helium gas",
    "context": "Particle physics / dissipative muon-beam compression",
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    "what_changed": "The muCool team demonstrated separate longitudinal and transverse compression stages for positive muons stopped in helium gas. Bao and colleagues used electric fields to concentrate the stopping distribution along a magnetic field. Antognini and colleagues later used a cryogenic density gradient and crossed fields to obtain transverse convergence. Decay-positron time spectra, control conditions and collision simulations supported both demonstrations. The inferred final sizes and compression times were obtained through those models rather than direct complete beam tomography.",
    "scope": "The muCool team demonstrated separate longitudinal and transverse compression stages for positive muons stopped in helium gas. Bao and colleagues used electric fields to concentrate the stopping distribution along a magnetic field. Antognini and colleagues later used a cryogenic density gradient and crossed fields to obtain transverse convergence. Decay-positron time spectra, control conditions and collision simulations supported both demonstrations. The inferred final sizes and compression times were obtained through those models rather than direct complete beam tomography. The two experiments tested separate stages under different gas and injection conditions. Their proposed combined ten-order phase-space improvement required subsequent integration, extraction and reacceleration. Small final dimensions, efficiencies and momentum spreads include simulation assumptions, decay losses, detector acceptance and fitted alignment or impurity effects. This family does not establish a completed six-dimensional cooling and acceleration chain or directly measured universal compression factors.",
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