Figure A.7: Central plane of the measured magnetic field (a) and central field profiles (b) along the x -(blue) and y -(orange) axes. Values for y > 7 . 5 cm are not displayed due to the presence of the magnet yoke. Figure A.8: Measured beam profiles at the distal edge of the collimators. (a) Exemplary 2D beam profile for 180 MeV and (b) central line profiles for different energies between 80 and 180 MeV. Profiles were measured with an EBT3 film dosimeter attached to the back of the last collimator, perpendicular to the beam. Figure A.9: Measured beam deflection in z - (a) and y -direction (b) on the scintillation detector after transmission through the magnet air gap without phantom. Positions of beam profile maxima with (orange) and without (blue) the magnet in place are displayed. (a) (b) (a) (b) 16 (a) (b)