A practically zero horizontal magnetic field in a planar undulator used in the Tristan Super Light Facility.

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "planar undulator (synchrotron radiation facility)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "magnetic field irregularities (horizontal and vertical)",
    "undulator magnetic field measurements",
    "electron beam emittance estimates (via measured undulator spectrum)"
  ],
  "main_findings": "Precise measurements of the undulator magnetic field after synchrotron radiation experiments indicated that magnetic irregularities in both horizontal and vertical directions were negligibly small. The authors suggest this supports the correctness of prior emittance estimates based on the measured undulator spectrum.",
  "effect_direction": "no_effect",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "planar undulator",
    "synchrotron radiation",
    "magnetic field",
    "field irregularities",
    "horizontal magnetic field",
    "vertical magnetic field",
    "emittance",
    "Tristan Main Ring",
    "KEK"
  ],
  "suggested_hubs": [
    {
      "slug": "engineering-measurement",
      "weight": 0.62,
      "reason": "Engineering-focused magnetic field measurement and characterization of an undulator in a synchrotron facility."
    }
  ]
}