Speaker
Description
Generation and control of two electron bunches to achieve desired drive and witness quality is crucial for plasma-wakefield acceleration (PWFA) experiments. One scheme to generate two electron beams with desired spacing is to apply two laser pulses with ps delay on the photocathode and co-accelerated two electron beams in the same RF bucket. Such a method is used in e.g. two-color FEL and PWFA experiments.
We will talk about the dynamic, operation, and control aspects of the photocathode two-bunches configuration with nC bunch charge, asymmetric bunch charge ratio, kA peak current, and multi-stage compression. We will talk about experimental performance, and benchmark it against simulation and analytic theory incorporating wakefield effect. We demonstrate excellent longitudinal simulation-experiment agreement using XTCAV measurements, and show that photocathode two bunches provide sufficient flexibility and tunability for various advanced accelerator applications.
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