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3 Lattice description

The beamline, beam properties and physics processes are specified in the input file written in the GMAD language which is a variation of MAD-X language extended to handle sophisticated geometry and parameters relevant to radiation transport. GMAD is described in this section. Examples of input files can be found in the BDSIM distribution in the examples directory. In order to convert a MAD file into a GMAD one, a utility called mad2gmad.sh is provided in the utils directory.

The following MAD commands are not supported:

The following MAD commands:

are replaced with the marker command.

Footnotes

[1] To dump the optical properties of the lattice one can invoke bdsim with the --outline=file.txt --outline_type=optics options.

[2] To compute the coordinates of all machine elements in a global reference system one can invoke bdsim with the --outline=file.txt --outline_type=survey options