{
  "abstract": "We present the design and performance of an optical cryostat for testing silicon photomultipliers (SiPMs) with vacuum-ultraviolet (VUV) light. The cryostat operates within a temperature range of 120 to 340 K, achieving a temperature stability of 1.2 mK, measured in a rolling 10-minute window once settled within a liquid nitrogen fill-cycle, and 13.8 mK over a complete fill-cycle including the refill transient. The cryostat includes a VUV-transparent CaF$_2$ viewport with a 142 mm diameter clear aperture, which limits the optically accessible sample area to 158 cm$^2$. The viewport is integrated into a sealed dark box and optical table to facilitate light delivery. VUV illumination is achieved using a custom xenon scintillation lamp or a xenon flash lamp, with a motorized two-axis linear rail system ensuring precise light positioning over the sample. This paper details the cryostat and optical system design, as well as commissioning current-voltage (IV) measurements using Hamamatsu VUV-sensitive SiPMs from 165 to 295 K and a measurement of the photodetection efficiency at 165 K.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.05840",
  "author_total": 11,
  "authors": [
    {
      "name": "Lucas Darroch"
    },
    {
      "name": "Riya Rai"
    },
    {
      "name": "Soud Al Kharusi"
    },
    {
      "name": "David Gallacher"
    },
    {
      "name": "Megan Marquis"
    },
    {
      "name": "Sebastian Eppelt"
    },
    {
      "name": "Iskender Isikbay"
    },
    {
      "name": "Xiao Shang"
    },
    {
      "name": "Tsvetelin Totev"
    },
    {
      "name": "Naman Walia"
    },
    {
      "name": "Thomas Brunner"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cfav0qz9z9v6r.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.05840",
  "fulltext_url": null,
  "id": "cfav0qz9z9v6r",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.05840",
  "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.ins-det"
    ],
    [
      "openalex",
      "3108|Radiation Detection and Scintillator Technologies"
    ]
  ],
  "openalex": "W7212015413",
  "pdf_url": "https://arxiv.org/pdf/2609.05840",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cfav0qz9z9v6r.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.05840",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.05840"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    }
  ],
  "title": "An optical cryostat for automated testing of silicon photomultipliers with vacuum-ultraviolet light",
  "title_text": "An optical cryostat for automated testing of silicon photomultipliers with vacuum-ultraviolet light",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/cfav0qz9z9v6r",
  "venue": "arXiv",
  "versions": []
}