DEVICE AND METHOD FOR CONTROLLING A RASTER SCANNER IN ION-BEAM THERAPY

摘要

The invention relates to a device and a method for controlling a raster scanner used in ion-beam therapy. Such a device for controlling a raster scanner comprises power supply units for supplying a magnetic current to ion - beam scanner magnets which deflect horizontally and vertically in relation t o the ion-beam centre. The power supply units are controlled by control and re ad- out modules for the scanner magnets. The device further comprises a position - sensitive detector for position measurements, which is controlled via a control and read-out module. A sequence-control device controls the control and read-out process of the different apparatus of the device. A circuit in the sequence-control device comprises a feedback loop between the control an d read-out modules for the control magnets and the control and read-out module of the position-sensitive detector. In addition, the control and read-out modules for the scanner magnets and the control and read-out module of the position-sensitive detector are arranged in the sequence-control device in such a way, as regards circuit connections and sequence control, that the control and read-out modules for the scanner magnets are series-connected downstream of the control and read-out module of the position-sensitive detector.