{
  "FILE_FORMAT": 1, 
  "FILE_HEADER_LINES": 11, 
  "X1_FACTOR": 0.001, 
  "Y1_FACTOR": 1e-06, 
  "YEAR_FABRICATION": null, 
  "SURFACE_SHAPE": "elliptical", 
  "FUNCTION": "plane elliptical mirror for horizontal focusing at CXI-Station at LCLS",
  "LENGTH": 0.350, 
  "WIDTH": null,
  "THICK": null,
  "LENGTH_OPTICAL": 0.350, 
  "SUBSTRATE": null, 
  "COATING": null, 
  "FACILITY": "Helmholtz Zentrum Berlin", 
  "INSTRUMENT": null, 
  "POLISHING": null, 
  "ENVIRONMENT": null, 
  "SCAN_DATE": null, 
  "PLOT_TITLE_X1": "x(mm)", 
  "PLOT_TITLE_Y1": "Slope (urad)",
  "CALC_HEIGHT_RMS": null,
  "CALC_HEIGHT_RMS_FACTOR": null, 
  "CALC_SLOPE_RMS": 0.06, 
  "CALC_SLOPE_RMS_FACTOR": 1e-6,
  "ELLIPSE_DESIGN_P": 420.0,
  "ELLIPSE_DESIGN_Q": 0.9,
  "ELLIPSE_DESIGN_THETA": 3.052e-3,
  "USER_REFERENCE": "design parameter of ellipse: entrance arm: 420000mm; exit arm: 900mm; angle of incidence 3.052mrad",
  "USER_ADDED_BY": "Frank Siewert",
  "USER_EXAMPLE": "This is an example of user keyword"
}