The ion motion in self-modulated plasma wakefield accelerators

Abstract

The effects of plasma ion motion in self-modulated plasma based accelerators is examined. An analytical model describing ion motion in the narrow beam limit is developed, and confirmed through multi-dimensional particle-in-cell simulations. It is shown that the ion motion can lead to the early saturation of the self-modulation instability, and to the suppression of the accelerating gradients. This can reduce the total energy that can be transformed into kinetic energy of accelerated particles. For the parameters of future proton-driven plasma accelerator experiments, the ion dynamics can have a strong impact. Possible methods to mitigate the effects of the ion motion in future experiments are demonstrated.

11 pages, 3 figures, accepted for publication in Phys. Rev. Lett

References in corpus (5)

• One-to-one direct modeling of experiments and astrophysical scenarios: pushing the envelope on kinetic plasma simulations
• Self-modulation instability of a long proton bunch in plasmas
• Growth and phase velocity of self-modulated beam-driven plasma waves
• Phase velocity and particle injection in a self-modulated proton-driven plasma wakefield accelerator
• Transverse self-modulation of ultra-relativistic lepton beams in the plasma wakefield accelerator

Cited by in corpus (30)

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• Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch
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• Non-linear Ion-wake Excitation by Ultra-relativistic Electron Wakefields
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