Speaker
Description
The AWAKE experiment harnesses the 400 GeV proton beam from the CERN SPS to drive plasma wakefields, which in turn accelerate a witness bunch of electrons to high energy. Upgrades are currently being carried out to facilitate the experimental programme of Run 2c, which includes control of the witness bunch quality during acceleration. We here present the first full simulations of the beam–plasma interaction for AWAKE Run 2c, including self-modulation of the proton drive beam and the acceleration of the witness bunch in the wakefields of the resulting train of driver microbunches. We demonstrate that the length of the proton drive beam has a significant impact on the transverse wakefield dynamics which impact the quality of the accelerated electron witness. These simulations inform the choice of parameters for the experiment.
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