{
  "abstract": "We report on a Penning trap based on NdFeB permanent magnets operated at 4\\,K with a magnetic field strength of 280\\,mT. Reliable loading and confinement of protons, H$_2^+$ ions, and electrons was demonstrated with non-destructive single-particle detection sensitivity of protons and H$_2^+$ ions using superconducting image-current circuits. The axial frequency of individual particles reaches a shot-to-shot stability of 47 parts-per-billion comparable to that of state-of-the-art precision Penning-trap experiments. Measurements of the proton modified-cyclotron frequency show a shot-to-shot scatter of $0.14$ parts per million (p.p.m.), presently limited by millikelvin-level temperature fluctuations of the permanent-magnet assembly. We outline a route towards improving this performance by more than an order of magnitude. This development offers broad potential for axial-mode-related precision measurements and cost-efficient Penning-trap experiments, and represents an important step towards compact, scalable, and transportable antiproton-trap systems.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.26858",
  "author_total": 33,
  "authors": [
    {
      "name": "F. Völksen"
    },
    {
      "name": "K. K. Anjum"
    },
    {
      "name": "R. P. Czampiel"
    },
    {
      "name": "N. Daehnhardt"
    },
    {
      "name": "S. Gavranovic"
    },
    {
      "name": "J. Hoentges"
    },
    {
      "name": "L. Kürschner"
    },
    {
      "name": "J. D. Regier"
    },
    {
      "name": "D. Schweitzer"
    },
    {
      "name": "1"
    },
    {
      "name": "2"
    },
    {
      "name": "P. Schöps"
    },
    {
      "name": "A. M. Thomas"
    },
    {
      "name": "S. Wienhues"
    },
    {
      "name": "B. Arndt"
    },
    {
      "name": "T. Imamura"
    },
    {
      "name": "S. Endoh"
    },
    {
      "name": "B. M. Latacz"
    },
    {
      "name": "M. Leonhardt"
    },
    {
      "name": "P. Micke"
    },
    {
      "name": "J. Morgner"
    },
    {
      "name": "D. Natakala"
    },
    {
      "name": "S. Stahl"
    },
    {
      "name": "H. Yildiz"
    },
    {
      "name": "K. Blaum"
    },
    {
      "name": "J. A. Devlin"
    },
    {
      "name": "Y. Matsuda"
    },
    {
      "name": "C. Ospelkaus"
    },
    {
      "name": "W. Quint"
    },
    {
      "name": "A. Soter"
    },
    {
      "name": "J. Walz"
    },
    {
      "name": "C. Smorra"
    },
    {
      "name": "S. Ulmer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dwf1nhgvt8f2f.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26858",
  "fulltext_url": null,
  "id": "dwf1nhgvt8f2f",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26858",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.atom-ph"
    ],
    [
      "openalex",
      "3107|Atomic and Molecular Physics"
    ]
  ],
  "openalex": "W7214166179",
  "pdf_url": "https://arxiv.org/pdf/2609.26858",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dwf1nhgvt8f2f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2609.26858",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26858"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    }
  ],
  "title": "A Cryogenic Penning Trap Based on Permanent Magnets",
  "title_text": "A Cryogenic Penning Trap Based on Permanent Magnets",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/dwf1nhgvt8f2f",
  "venue": "arXiv",
  "versions": []
}