Extraction JSON

example. See also https://github.com/NMGRLData/Lusk01121/blob/master/666/extraction/81-03L.extr.json

{
  "beam_diameter": 1.25,
  "cleanup_duration": 240.0,
  "commit": "afadbe983d50e31a4821ee2e7a435b5847286752",
  "extract_device": "Fusions CO2",
  "extract_duration": 30.0,
  "extract_units": "watts",
  "extract_value": 0.2,
  "grain_polygons": [],
  "load_holder": "221-hole",
  "load_name": "C0014",
  "measured_response": "",
  "pattern": "",
  "positions": [
      {
          "is_degas": false,
          "position": "33",
          "x": null,
          "y": null,
          "z": null
      }
  ],
  "ramp_duration": 5.0,
  "ramp_rate": 0.0,
  "requested_output": "",
  "setpoint_stream": "",
  "snapshots": [],
  "tray": "",
  "videos": [],
  "weight": 0.0
}