A multi-waveform pulsed current generator for slow kicker magnets

As part of the LIU project at CERN pulsed magnet current generators for phase space painting of the PSB accelerator were developed that generate pulse to pulse programmable waveforms comprising four linear slopes of variable length. A high current generator with a peak current of 400A and a low current version with 40A were developed. Amplitude tolerance is . The waveforms are generated by connecting pre-charged capacitors to the magnet to make the current rise or fall. The final precision is controlled with a feedback loop and a linear class AB power amplifier. Special capacitor charger modules were developed that allow fast up/down voltage adjustment of the capacitors. The charger outputs are floating and tolerate voltages of ±2.5kV. An overview of the entire system is given and the main building blocks are described in detail. Measurement data is presented and the performance of the building blocks is discussed.