{
  "Name": "Example beamline apertures",
  "units": "m",
  "Apertures": {
    "DU50": {
      "type": "elliptical",
      "s":    [0.0,   205.0],
      "Xmax": [0.025, 0.025],
      "Ymax": [0.015, 0.015]
    },
    "kicker": {
      "type": "rectangular",
      "visible": false,
      "s":    [-0.4,  -0.35,  0.35,  0.4],
      "Xmax": [ 0.022, 0.018, 0.018, 0.022]
    },
    "kicker 1": {
      "definition": "kicker",
      "s_shift": 1.0
    },
    "kicker 2": {
      "definition": "kicker",
      "s_shift": 6.0
    },
    "septum": {
      "type": "rectangular",
      "visible": false,
      "s":    [ -0.4,  0.4],
      "Xmin": [-0.020,-0.020],
      "Xmax": [ 0.012, 0.012],
      "Ymax": [ 0.010, 0.010]
    },
    "Septum 1": {
      "definition": "septum",
      "s_shift": 2.0
    },
    "bend": {
      "type": "elliptical",
      "visible": false,
      "s":    [-0.5,   0.5],
      "Xmax": [0.023, 0.023],
      "Ymax": [0.013, 0.013]
    },
    "B10": {
      "definition": "bend",
      "s_shift": 3.0
    },
    "B20": {
      "definition": "bend",
      "s_shift": 5.0
    }
  }
}