WARNING: The following describes an older (beta) version of FLY2. FLY2 is currently supported in SIMION 8. Refer to the SIMION 8 manual for the latest FLY2 specification.

Figure: Randomized ions generated from a FLY2 file.

--A much more flexible way to generate initial particle parameters than .FLY files.

The FLY2 format is the successor to the FLY format of SIMION 7.0. Like the FLY format, FLY2 format makes it easy to specify initial ion parameters for a large number of ions without defining each ion individually (as in SIMION's ION format). However, FLY2 overcomes many limitations of FLY and is much more flexible. FLY2 files can be converted into ION files for use in SIMION 6.0 or above.

.FLY2 Tutorial and Reference (START HERE)
Online FLY2 to ION file converter - Try it out!

Example .FLY2 file (for figure shown above):

-- Particles in random position, direction, and energies.
standard_beam_define {
  n = 100,
  x = gaussian_distribution {mean = 0, stdev = 1},
  y = gaussian_distribution {mean = 0, stdev = 1},
  z = gaussian_distribution {mean = 0, stdev = 1},
  ke = gaussian_distribution {mean = 10, stdev = 5},
  direction = cone_distribution {
    axis_direction = {1, 1, 1},
    vertex_angle = 180
  }
}

For any questions, contact us (attn: David Manura) or use the form below.

The SIMION .FLY2 Particle Definition File