Short manual on how to use the field conversion code "Poisson_To_TRACK" on this page: http://www.phy.anl.gov/atlas/TRACK/Trackv39/Windows/Field-Conversion/Poisson_To_TRACK/ I recommed that you use the full geometry in Poisson, not 1/2 or 1/4 assuming symmetry. The lines in the input file "poisson_to_track.dat" are as follows: (There is a short description in front of the input value on the same line) line-1: Name of file to read = Poisson output file name line-2: Input Field type: 0:E, 1:B. This is a flag to tell the code if the field from Poisson is E or B. Later we'll add the possibility of combining two files one for E and one for B to produce a single file for elements with both fields. line-3: Input Field symmetry key in Z. This is in case the field files were generated using given symmetries in Poisson otherwise set it to 0. The possible values are 0: No symmetry in Z 1: Odd symmetry for the input field in the Z direction: F(-z) = -F(z). 2: Even symmetry for the input field in the Z direction: F(-z) = F(z). But you better calculate the full geometry with Poisson and use 0 to avoid confusion. line-4: Track Field file number: 1,2,... This is the extension or the number "nn" of the output file eh_EMS.#nn = TRACK input. line-5: Track Field file format: 0, 1 or 2. Now we have only the binary format available, that is 0. We'll add other formats later. line-6: Track Field symmetry keys in X, Y & Z. If the geometry is symmetric we can take advantage of that to have a finer field grid in TRACK. But you better use 0,0,0 to avoid confusion. line-7: Element/Field length in cm. This is the field length in cm to consider in the output file. This allows some flexibility to adjust the element length in TRACK. line-8: Element/Field aperture in cm. This is the field aperture in cm to consider in the output file. This allows some flexibility to adjust the element aperture in TRACK. line-9: Electric field normalization for Emax=1. This is a scaling factor to normalize the max E field to 1. The real field strength should be input in the corresponding element line in the "sclinac.dat" file when runing TRACK. line-10: Magnetic field normalization for Bmax=1. This is the same as line-9 but for B field. Please let me know if there is a problem with the code, or if you run into trouble when using symmetries for the input or output field files. This Example: A Solenoid field file generated by Poisson using Z symmetry.