{
  "schema": "semiagora.vacuum-gas-source-spine.v1",
  "version": "2026-08-28-vacuum-gas-v1",
  "experimentId": "SA-EQP-VAC-GAS-009",
  "generatedAt": "2026-08-28T00:00:00.000Z",
  "sources": [
    {
      "id": "cern-vacuum-systems-2024",
      "label": "II.8 - Vacuum Systems",
      "publisher": "CERN Yellow Reports: School Proceedings",
      "url": "https://cds.cern.ch/record/2929324",
      "sourceType": "official-laboratory-open-training-monograph",
      "rightsStatus": "link-only; record declares CC BY 4.0 for the publication",
      "use": "Pressure, gas density, mean free path, throughput, conductance, pumping speed, effective pumping speed, outgassing, and instrumentation ownership vocabulary.",
      "numericUse": "none",
      "artifactUse": "none"
    },
    {
      "id": "cern-vacuum-superconducting-devices",
      "label": "Vacuum Technology for Superconducting Devices",
      "publisher": "CERN Accelerator School",
      "url": "https://cds.cern.ch/record/1974068",
      "sourceType": "official-laboratory-school-paper",
      "rightsStatus": "link-only; CERN record and paper rights notices apply",
      "use": "Pump throughput, capture probability, nominal versus effective pumping speed, and conductance-limited system vocabulary.",
      "numericUse": "none",
      "artifactUse": "no table, coefficient, geometry, or worked example copied"
    },
    {
      "id": "cern-vacuum-principles",
      "label": "Introduction to the Principles of Vacuum Physics",
      "publisher": "CERN Accelerator School",
      "url": "https://cds.cern.ch/record/582156",
      "sourceType": "official-laboratory-school-paper",
      "rightsStatus": "link-only",
      "use": "Kinetic-theory, pressure, density, mean-free-path, conductance, temperature, and gas-flow scope.",
      "numericUse": "none",
      "artifactUse": "none"
    },
    {
      "id": "cern-molflow-paper",
      "label": "Introduction to the Latest Version of the Test-particle Monte Carlo Code Molflow+",
      "publisher": "CERN Document Server / IPAC",
      "url": "https://cds.cern.ch/record/1967008",
      "sourceType": "primary-open-software-method-paper",
      "rightsStatus": "link-only; record declares CC BY for the publication",
      "use": "Test-particle Monte Carlo, molecular-flow geometry, source-to-pump trajectories, conductance, pressure-profile, and time-dependent model boundaries.",
      "numericUse": "none",
      "artifactUse": "no source code, geometry, equation, screenshot, tutorial result, or output copied"
    },
    {
      "id": "cern-molflow-2023-note",
      "label": "Molflow+ Software for Molecular Flow Simulations",
      "publisher": "CERN Physics Beyond Colliders",
      "url": "https://cds.cern.ch/record/2865274",
      "sourceType": "official-laboratory-technical-note",
      "rightsStatus": "link-only; CERN record rights apply",
      "use": "Molecular-flow applicability, neglected intermolecular collisions, event-driven wall interactions, and linear superposition boundary.",
      "numericUse": "none",
      "artifactUse": "no geometry, source term, trajectory, result, or figure copied"
    },
    {
      "id": "nist-pressure-vacuum-measurements",
      "label": "Pressure and Vacuum Measurements",
      "publisher": "National Institute of Standards and Technology",
      "url": "https://www.nist.gov/system/files/documents/calibrations/pmc-2.pdf",
      "sourceType": "official-government-measurement-guide",
      "rightsStatus": "link-only; NIST and embedded-material notices apply",
      "use": "Static expansion, dynamic expansion, conductance-limited flow, gauge interaction, and uncertainty ownership vocabulary.",
      "numericUse": "none",
      "artifactUse": "no equation, diagram, table, procedure, or calibration value copied"
    },
    {
      "id": "nist-pressure-vacuum-calibrations",
      "label": "Pressure/Vacuum Calibrations",
      "publisher": "National Institute of Standards and Technology",
      "url": "https://www.nist.gov/programs-projects/pressurevacuum-calibrations",
      "sourceType": "official-government-program-page",
      "rightsStatus": "link-only",
      "use": "Traceability, calibration range ownership, primary and transfer standards, and time-dependent pressure measurement scope.",
      "numericUse": "none",
      "artifactUse": "none"
    },
    {
      "id": "nist-gas-flow-standards",
      "label": "Gas Flow Standards and Their Uncertainty",
      "publisher": "National Institute of Standards and Technology",
      "url": "https://www.nist.gov/publications/gas-flow-standards-and-their-uncertainty",
      "sourceType": "primary-government-publication-record",
      "rightsStatus": "link-only; journal and NIST rights notices apply",
      "use": "Flow-standard families, uncertainty budgets, calibration ownership, and measurement-method boundaries.",
      "numericUse": "none",
      "artifactUse": "no paper body, uncertainty table, hardware example, or value copied"
    },
    {
      "id": "nist-pinhole-conductance",
      "label": "Precise Conductance Measurements of a Pinhole Orifice Using a Constant-pressure Flowmeter",
      "publisher": "National Institute of Standards and Technology",
      "url": "https://www.nist.gov/publications/precise-conductance-measurements-pinhole-orifice-using-constant-pressure-flowmeter",
      "sourceType": "primary-government-publication-record",
      "rightsStatus": "link-only",
      "use": "Measured conductance, gas dependence, pressure dependence, and uncertainty ownership.",
      "numericUse": "none",
      "artifactUse": "no gas result, pressure point, apparatus detail, curve, or coefficient copied"
    },
    {
      "id": "nist-vacuum-gauge-calibration",
      "label": "Recommended Practice for Calibrating Vacuum Gauges of the Ionization Type",
      "publisher": "National Institute of Standards and Technology",
      "url": "https://www.nist.gov/publications/recommended-practice-calibrating-vacuum-gauges-ionization-type",
      "sourceType": "official-government-recommended-practice-record",
      "rightsStatus": "link-only; journal rights apply",
      "use": "Gauge comparison, SI traceability, uncertainty budgets, and reporting requirements.",
      "numericUse": "none",
      "artifactUse": "no procedure, apparatus, formula, or uncertainty value copied"
    },
    {
      "id": "nist-primary-vacuum-standard",
      "label": "NIST Demonstrates a New Primary Standard for Measuring Ultralow Pressures",
      "publisher": "National Institute of Standards and Technology",
      "url": "https://www.nist.gov/news-events/news/2023/08/nist-demonstrates-new-primary-standard-measuring-ultralow-pressures",
      "sourceType": "official-government-research-summary",
      "rightsStatus": "link-only",
      "use": "Dynamic-expansion source-removal balance and independent pressure-standard comparison vocabulary.",
      "numericUse": "none",
      "artifactUse": "none"
    },
    {
      "id": "nasa-vacuum-technology-sp105",
      "label": "Vacuum Technology and Space Simulation (NASA SP-105)",
      "publisher": "NASA Technical Reports Server",
      "url": "https://ntrs.nasa.gov/citations/19660026839",
      "sourceType": "official-government-technical-monograph",
      "rightsStatus": "link-only; U.S. government work and NTRS record notices apply",
      "use": "Distinguishing conductance between two points from pumping speed at a point, plus gas loading, outgassing, and directional-effect vocabulary.",
      "numericUse": "none",
      "artifactUse": "no equation, table, conversion factor, design rule, or operating procedure copied"
    },
    {
      "id": "nasa-low-dead-volume-inlet",
      "label": "Low-Dead-Volume Inlet for Vacuum Chamber",
      "publisher": "NASA Technical Reports Server",
      "url": "https://ntrs.nasa.gov/citations/20100019611",
      "sourceType": "official-government-technical-brief-record",
      "rightsStatus": "link-only; NTRS marks public distribution/public use",
      "use": "Dead volume, conductance limit, delayed response, and inlet transient vocabulary.",
      "numericUse": "none",
      "artifactUse": "no hardware dimension, design, drawing, or implementation instruction copied"
    },
    {
      "id": "nasa-transient-molecular-transfer",
      "label": "Transient Molecular Transfer During Vacuum Testing",
      "publisher": "NASA Technical Reports Server",
      "url": "https://ntrs.nasa.gov/citations/20110015297",
      "sourceType": "official-government-workshop-record",
      "rightsStatus": "link-only; NTRS public distribution notice applies",
      "use": "Transient release, migration, redeposition, and measurement ownership vocabulary for wall-source limitations.",
      "numericUse": "none",
      "artifactUse": "no measurement, material result, figure, or procedure copied"
    }
  ],
  "claimNodes": [
    {
      "node_id": "vacuum-throughput-inventory",
      "topic": "Gas admission, wall release, stored inventory, transfer, and removal must be kept as distinct terms in a bounded balance.",
      "source_ids": [
        "cern-vacuum-systems-2024",
        "cern-vacuum-superconducting-devices",
        "nasa-vacuum-technology-sp105"
      ],
      "boundary": "The packet uses exact integer teaching-token ledgers, not physical throughput, leak, outgassing, or pressure values."
    },
    {
      "node_id": "vacuum-conductance-versus-speed",
      "topic": "Conductance is a restriction between locations, while pumping speed is defined at a location; both constrain effective removal seen by a chamber.",
      "source_ids": [
        "cern-vacuum-systems-2024",
        "cern-vacuum-superconducting-devices",
        "nasa-vacuum-technology-sp105"
      ],
      "boundary": "Normalized series-limitation proxies do not size a line, valve, or pump and do not reproduce a source equation."
    },
    {
      "node_id": "vacuum-flow-regime",
      "topic": "Continuum-like, transition-like, and molecular-like conditions require different physical models and cannot be treated as one universal flow law.",
      "source_ids": [
        "cern-vacuum-principles",
        "cern-vacuum-systems-2024",
        "cern-molflow-2023-note"
      ],
      "boundary": "The three regimes are ordinal labels with no Knudsen number, pressure, geometry, collision model, or transition criterion."
    },
    {
      "node_id": "vacuum-molflow-boundary",
      "topic": "Test-particle Monte Carlo is appropriate to declared molecular-flow problems where intermolecular collisions are neglected and geometry/wall/pump boundaries are supplied.",
      "source_ids": [
        "cern-molflow-paper",
        "cern-molflow-2023-note"
      ],
      "boundary": "The packet neither runs Molflow+ nor claims equivalence to its geometry, trajectories, pressure profiles, or validation."
    },
    {
      "node_id": "vacuum-transient-response",
      "topic": "Chamber volume, inlet dead volume, conductance, wall release, and effective pumping can produce distinct transient and settling behavior.",
      "source_ids": [
        "cern-molflow-paper",
        "nasa-low-dead-volume-inlet",
        "nasa-transient-molecular-transfer"
      ],
      "boundary": "Replay steps are ordered states, not seconds, response-time specifications, purge timing, or operating instructions."
    },
    {
      "node_id": "vacuum-wall-source",
      "topic": "Wall release and migration can remain important gas-source terms and must not be silently merged with commanded admission.",
      "source_ids": [
        "cern-vacuum-systems-2024",
        "nasa-vacuum-technology-sp105",
        "nasa-transient-molecular-transfer"
      ],
      "boundary": "No material, desorption law, sticking coefficient, cleaning condition, bake condition, contamination result, or maintenance action is modeled."
    },
    {
      "node_id": "vacuum-gas-flow-metrology",
      "topic": "Gas-flow claims require a declared standard, calibration chain, uncertainty budget, and range appropriate to the measurement method.",
      "source_ids": [
        "nist-gas-flow-standards",
        "nist-pressure-vacuum-calibrations"
      ],
      "boundary": "Normalized admitted tokens are not a flow calibration, mass-flow-controller characterization, or uncertainty result."
    },
    {
      "node_id": "vacuum-pressure-metrology",
      "topic": "Pressure traces require gauge-model ownership, calibration, traceability, location, gas response, uncertainty, and interaction review.",
      "source_ids": [
        "nist-pressure-vacuum-measurements",
        "nist-vacuum-gauge-calibration",
        "nist-primary-vacuum-standard"
      ],
      "boundary": "The chamber-pressure proxy is neither a gauge reading nor a calibrated pressure estimate."
    },
    {
      "node_id": "vacuum-conductance-measurement",
      "topic": "Conductance depends on the declared gas-flow regime, geometry, gas, pressure context, and measurement uncertainty.",
      "source_ids": [
        "nist-pinhole-conductance",
        "cern-vacuum-systems-2024",
        "cern-vacuum-principles"
      ],
      "boundary": "The conductance-state axis is ordinal and carries no measured coefficient or geometry."
    },
    {
      "node_id": "vacuum-downstream-handoff",
      "topic": "A vacuum/gas replay may hand bounded pressure-, residence-, stability-, and delivery-state labels to a separate chamber-state model only through an explicit evidence gate.",
      "source_ids": [
        "nist-pressure-vacuum-measurements",
        "nist-gas-flow-standards",
        "cern-molflow-paper"
      ],
      "boundary": "No automatic recipe, plasma condition, deposition or etch prediction, facilities action, or qualification decision is allowed."
    },
    {
      "node_id": "vacuum-replacement-evidence",
      "topic": "Operational replacement requires owned geometry, pump and conductance data, gas properties, wall-source history, calibrated pressure/flow traces, uncertainty, and independent review.",
      "source_ids": [
        "nist-pressure-vacuum-calibrations",
        "nist-gas-flow-standards",
        "nist-vacuum-gauge-calibration",
        "cern-vacuum-systems-2024"
      ],
      "boundary": "An evidence-posture label creates a replacement slot only; it never upgrades the generated teaching data."
    }
  ],
  "hardBoundary": "No source body, figure, table, equation, coefficient, geometry, pump curve, conductance value, flow value, pressure value, gas identity, chamber design, procedure, calibration row, measured trace, source code, Monte Carlo trajectory, named-tool output, vendor result, or equipment action enters the generated SemiAgora packet."
}