{
  "abstract": "A dedicated data acquisition (DAQ) system has been developed for the SUB-Millicharge ExperimenT (SUBMET) at the Japan Proton Accelerator Research Complex (J-PARC), a search for particles carrying a fractional electric charge $Q = εe$ with $ε$ below $\\mathcal{O}(10^{-3})$, hereafter referred to as millicharged particles (mCPs). Because such particles are expected to produce at most a few scintillation photons, the system is optimized for single-photoelectron detection from the photomultiplier tubes (PMTs), combining high-speed waveform digitization with precise timing. To capture eight consecutive proton bunches of the 30 GeV J-PARC beam within a single trigger, the eight channels of the Domino Ring Sampler 4 (DRS4) chip are cascaded in groups of four to form two readout inputs, each sampling 4096 points continuously at 820.5 MHz over an effective time window of 5 us. After calibration, timing differences between channels are within 1 ns on the same DRS4 chip, 2 ns on the same board, and 8 ns across different boards, well within the 30 ns coincidence window of the experiment. The front-end electronics achieve an RMS noise below 0.4 mV. The baseline is deliberately offset upward such that the negative-going pulses span a larger fraction of the digitizer range, improving voltage resolution and dynamic range. A trigger control board aggregates data from multiple readout boards and sustains the data-transfer rate required for beam operation. The measured performance confirms that the DAQ system meets the timing, noise, and throughput requirements of the experiment.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08427",
  "author_total": 23,
  "authors": [
    {
      "name": "Claudio Campagnari"
    },
    {
      "name": "Sungwoong Cho"
    },
    {
      "name": "Suyong Choi"
    },
    {
      "name": "Seokju Chung"
    },
    {
      "name": "Matthew Citron"
    },
    {
      "name": "Albert De Roeck"
    },
    {
      "name": "Martin Gastal"
    },
    {
      "name": "Seungkyu Ha"
    },
    {
      "name": "Andy Haas"
    },
    {
      "name": "Christopher Scott Hill"
    },
    {
      "name": "Insung Hwang"
    },
    {
      "name": "Hoyong Jeong"
    },
    {
      "name": "Jaebak Kim"
    },
    {
      "name": "Jeonghwa Kim"
    },
    {
      "name": "Hyunki Moon"
    },
    {
      "name": "Ryan Schmitz"
    },
    {
      "name": "David Stuart"
    },
    {
      "name": "Eunil Won"
    },
    {
      "name": "Jae Hyeok Yoo"
    },
    {
      "name": "Jinseok Yoo"
    },
    {
      "name": "Ayman Youssef"
    },
    {
      "name": "Ahmad Zaraket"
    },
    {
      "name": "Haitham Zaraket"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/72gx68j46d1va.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08427",
  "fulltext_url": null,
  "id": "72gx68j46d1va",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08427",
  "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",
      "hep-ex"
    ],
    [
      "arxiv",
      "physics.ins-det"
    ],
    [
      "openalex",
      "3106|Particle Detector Development and Performance"
    ]
  ],
  "openalex": "W7212033503",
  "pdf_url": "https://arxiv.org/pdf/2609.08427",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/72gx68j46d1va.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:49Z",
      "native_id": "2609.08427",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08427"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Readout electronics for SUBMET",
  "title_text": "Readout electronics for SUBMET",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:49Z",
  "url": "https://research.draconitic.com/paper/72gx68j46d1va",
  "venue": "arXiv",
  "versions": []
}