Short manual on how to use the field conversion code "Superfish_To_TRACK" on this page: http://www.phy.anl.gov/atlas/TRACK/Trackv39/Windows/Field-Conversion/Superfish_To_TRACK/ I recommed that you use the full geometry in Superfish, not 1/2 or 1/4 assuming symmetry. The lines in the input file "superfish_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 = Superfish output file name line-2: 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 electric field in the Z direction: E(-z) = -E(z) and even symmetry for the magnetic field B(-z)=E(z). 2: Even symmetry for the electric field in the Z direction: E(-z) = E(z) and odd symmetry for magnetic field B(-z)=-B(z). But you better calculate the full geometry with Poisson and use 0 to avoid confusion. line-3: Track Field file number: 1,2,... This is the extension or the number "nn" of the output file eh_MWS.#nn = TRACK input. line-4: 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-5: 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-6: Cavity/Field frequency in Hz. This is the design frequency used only to check the consistency of the field components by verifying Maxwell equations, see log file line-7: Cavity/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: Cavity/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: Invert(1)/Not(0) the Z axis. This is a flag to invert or not the Z axis of the field. This is useful when there is no Z symmetry and the cavity could be put on the beam line tail first. In SNS for example, some cavities were alternating: head-tail then tail-head. line-10: Electric field normalization for Emax=E0. This is a scaling factor to normalize the max E field to the maximum value E0 the cavity could deliver. There is also the possibility to set the field strength in the "cav" input line in the "sclinac.dat" file when runing TRACK. Note the same factor applies to 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: An RF cavity field file calculated with Superfish using Z symmetry.