Speaker
Description
Diamond Light Source has, since the start of operation, run with both single bunch and multi bunch injection. Due to limitations in functionality and jitter in multi bunch mode, Diamond has been running with an upgraded gun pulser for the past 3 years. This pulser enables flexible modulation of the gun cathode in multi bunch mode by generating voltage waveforms from an arbitrary waveform generator (AWG). Single bunch operation was implemented using a separate supply to replicate the old pulser, allowing simple injection while providing scope for development of the multi bunch circuit. Leveraging the flexibility of the new pulser, fill patterns can be selected and injected with fewer shots and improved repeatability, leading to, among other things, faster fill times. Details of the functionality, design, and operation will be presented, along with results and issues related to reproducibility.
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