aperture_data

• type: setup command.
• function: specify a file from which to take x and y aperture data vs s.

&aperture_data
        STRING input = NULL;
        long periodic = 1; 
        long disable = 0;
&end

• input -- Name of SDDS file supplying the aperture data. The following columns are all required, in double or float type, with units of m (meters).
  1. s -- Distance along the central trajectory.
  2. xHalfAperture -- Half aperture in the horizontal.
  3. yHalfAperture -- Half aperture in the vertical.
  4. xCenter -- Center of the aperture in the horizontal.
  5. yCenter -- Center of the aperture in the vertical.
• periodic -- If non-zero, the aperture is a periodic function of s, with period equal to the range of the data.
• disable -- If non-zero, the command is ignored.