Based on an H-bridge technique, four branches of power HexaFETs form a two by two switch. The raster air-core magnet is located at the center of H-bridge. A high voltage power supply powers the two far rails of the switch. By switching the HexaFETs in the right order and at the right frequency, a triangular current waveform is generated. The timing property of the switch is determined by the H-Bridge controller. The magnetic field of the raster magnets follow the shape of the current waveform and this steers the beam using a triangular waveform rather than a sinusoidal waveform.