{
  "annotation_id": "1109b871-9623-4839-abc5-81db7700d69e",
  "date_created": "2026-03-02T18:00:45.833000Z",
  "date_modified": "2026-03-02T18:00:45.833000Z",
  "file_hash": "ac34a53d206f10f6399ea20781bb970f27a8c0064f7ccf64e4a43bd7fa9bdc81",
  "private": false,
  "record": {
    "abstract": "Production of antihydrogen atoms by mixing antiprotons with a cold, confined,\npositron plasma depends critically on parameters such as the plasma density and\ntemperature. We discuss non-destructive measurements, based on a novel,\nreal-time analysis of excited, low-order plasma modes, that provide\ncomprehensive characterization of the positron plasma in the ATHENA\nantihydrogen apparatus. The plasma length, radius, density, and total particle\nnumber are obtained. Measurement and control of plasma temperature variations,\nand the application to antihydrogen production experiments are discussed.",
    "arxiv_id": "physics/0307151",
    "authors": [
      "ATHENA Collaboration",
      "M. Amoretti",
      "C. Amsler",
      "G. Bonomi",
      "A. Bouchta",
      "P. D. Bowe",
      "C. Carraro",
      "C. L. Cesar",
      "M. Charlton",
      "M. Doser",
      "V. Filippini",
      "A. Fontana",
      "M. C. Fujiwara",
      "R. Funakoshi",
      "P. Genova",
      "J. S. Hangst",
      "R. S. Hayano",
      "L. V. Jorgensen",
      "V. Lagomarsino",
      "R. Landua",
      "D. Lindelof",
      "E. Lodi Rizzini",
      "M. Macri\u0027",
      "N. Madsen",
      "G. Manuzio",
      "P. Montagna",
      "H. Pruys",
      "C. Regenfus",
      "A. Rotondi",
      "G. Testera",
      "A. Variola",
      "D. P. van der Werf"
    ],
    "categories": [
      "physics.plasm-ph",
      "hep-ex",
      "nucl-ex"
    ],
    "doi": "10.1103/PhysRevLett.91.055001",
    "journal_ref": "Phys.Rev.Lett.91:055001,2003",
    "title": "Positron plasma diagnostics and temperature control for antihydrogen   production",
    "url": "https://arxiv.org/abs/physics/0307151"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8bcbc4c7-149e-4ee3-9fbc-44b92c478951",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}