An ion beam facility has a first ion beam system for a first ion type that contains
a first ion beam generator and a first ion transport line with at least one first
ion switch for one of at least two first irradiation stations and has a second
ion beam system for a second ion species with a second ion transport line or is
fashioned expandable therewith. At least one of the first irradiation stations
also can be operated with the second ion type or the ion transport lines are arranged
proceeding essentially parallel to one another. For the expansion, the first ion
transport line is conducted along a wall of a building of the ion beam facility
and the wall is prepared for openings, so that at least one of the first irradiation
stations also can be operated with the second ion type via the subsequently installable,
second ion transport line at the other side of the wall, or space is reserved behind
the wall for at least the second, subsequently installable ion transport line.
