Migration between model elements of different model element types in a model provided within a modeling environment is described herein. Claws of the claw pole stator are an integral component of the tube, which is part of a motor housing, and the number of mounting steps is thus reduced. The roll is vertically orientated and then the lower end is immersed into a sealing compound to such a depth which will cause the sealing compound to travel up into the lower portion of the roll to a height above the height of the lower seal for the primary flutes. The second portion is reselected at predetermined intervals from among the candidates. The ion current is formed to have a linear sectional configuration, and doping is performed by moving a material to be doped in a direction substantially perpendicular to the longitudinal direction of a section of the ion current. Furthermore, the invention relates to a control program, a treatment control system, a treatment planning system and a dose measuring system.