Fig. 1. Overall layout of 1.2 MeV/10 mA electrostatic accelerator

Fig. 2. Schematic plot of X scanning (a) and Y scanning (b)

Fig. 3. Schematic diagram of the action principle of scanning magnet

Fig. 4. Theoretical calculation (a) and magnetic measurement (b) results of integral field error

Fig. 5. 3D plot of scanning magnet

Fig. 6. Waveform of excitation current of scanning magnet on oscilloscope(a) X direction, (b) Y direction

Fig. 7. Structure diagram of beam scanning nonuniformity measuring device (a) and detail structure of 1/9 unit (b)

Fig. 8. Panel display of voltage distribution (a) and beam scanning nonuniformity distribution at 0.1 mA and 1 mA under different energies (b)