{
  "abstract": "Pushing the brightness limit of electron sources requires simultaneously minimizing the intrinsic emittance and maximizing the accelerating field. Alkali-antimonide photocathodes exhibit excellent properties at low fields, yet their high-field photoemission physics remains poorly understood owing to acute vacuum sensitivity. Here, we demonstrate robust photoemission from alkali-antimonide photocathodes in a radio-frequency gun at peak fields exceeding 100 MV/m, with quantum efficiency maintained above 1% for more than two weeks, enabling the first systematic measurements of their high-field brightness limits. The measured field dependence of the intrinsic emittance provides direct insight into photoemission physics at high fields. Near-threshold photoemission further reduces the intrinsic emittance, increasing the attainable brightness, and reveals constraints imposed by surface roughness. This work opens the high-field regime for advanced photocathodes, extending the brightness limits of electron sources.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.01398",
  "author_total": 9,
  "authors": [
    {
      "name": "Peng-Wei Huang"
    },
    {
      "name": "Zhiyuan Wang"
    },
    {
      "name": "Xinlong Cao"
    },
    {
      "name": "Zhuoxuan Liu"
    },
    {
      "name": "Lianmin Zheng"
    },
    {
      "name": "Yingchao Du"
    },
    {
      "name": "Wenhui Huang"
    },
    {
      "name": "Chuanxiang Tang"
    },
    {
      "name": "Renkai Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7hmc05qgkhtvz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.01398",
  "fulltext_url": null,
  "id": "7hmc05qgkhtvz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.01398",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.acc-ph"
    ],
    [
      "openalex",
      "2204|Photocathodes and Microchannel Plates"
    ]
  ],
  "openalex": "W7216425438",
  "pdf_url": "https://arxiv.org/pdf/2610.01398",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7hmc05qgkhtvz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:45Z",
      "native_id": "2610.01398",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.01398"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.acc-ph",
      "subfield": "applied-instrumentation"
    }
  ],
  "title": "High-Field Brightness Limits of Alkali-Antimonide Photocathodes",
  "title_text": "High-Field Brightness Limits of Alkali-Antimonide Photocathodes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:45Z",
  "url": "https://research.draconitic.com/paper/7hmc05qgkhtvz",
  "venue": "arXiv",
  "versions": []
}