7.8 aperture_data

• type: setup command.
• function: specify a file from which to take x and y aperture data vs s.
• note: this command is also available under the name aperture_input.
• Command syntax, including use of equations and subcommands, is discussed in 7.2.

• 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.
• persistent — If non-zero, the aperture data persists across subsequent run_setup commands. By default, the aperture data is forgotten when a new run_setup command is seen.
• disable — If non-zero, the command is ignored.