{
  "abstract": "The Simons Observatory (SO) is a ground-based Cosmic Microwave Background (CMB) experiment that is located in the Atacama plateau. The Small Aperture Telescopes (SATs) of SO are optimized for polarimetry on the degree scale. Atmospheric $1/f$ contamination of the CMB signal poses a significant challenge for observations at this angular scale. In order to control the $1/f$ noise, the SATs utilize a Cryogenic Half-Wave Plate (CHWP) in their optics. The CHWP modulates the polarization signal to a higher frequency to separate it from the unpolarized atmospheric noise. Precision measurements of the CHWP rotation angle are required to successfully recover the target polarized signals. We present a method to reconstruct the CHWP rotation angle that achieves a noise level of 0.16 $μ\\mathrm{rad\\sqrt{s}}$, meeting our requirement.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.00265",
  "author_total": 8,
  "authors": [
    {
      "name": "Junna Sugiyama"
    },
    {
      "name": "Kyohei Yamada"
    },
    {
      "name": "Bryce Bixler"
    },
    {
      "name": "Daichi Sasaki"
    },
    {
      "name": "Yuki Sakurai"
    },
    {
      "name": "Kam Arnold"
    },
    {
      "name": "Nicholas Galitzki"
    },
    {
      "name": "Akito Kusaka"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/182jgfymdw608.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.00265",
  "fulltext_url": null,
  "id": "182jgfymdw608",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.00265",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.IM"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.00265",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/182jgfymdw608.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:06Z",
      "native_id": "2607.00265",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.00265"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    }
  ],
  "title": "The Simons Observatory: Overview of the Cryogenic Half-wave Plate Polarization Modulators",
  "title_text": "The Simons Observatory: Overview of the Cryogenic Half-wave Plate Polarization Modulators",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:06Z",
  "url": "https://research.draconitic.com/paper/182jgfymdw608",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1117/12.3101389",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}