Phase velocity and particle injection in a self-modulated proton-driven plasma wakefield accelerator

Abstract

It is demonstrated that the performance of the self-modulated proton driver plasma wakefield accelerator (SM-PDPWA) is strongly affected by the reduced phase velocity of the plasma wave. Using analytical theory and particle-in-cell simulations, we show that the reduction is largest during the linear stage of self-modulation. As the instability nonlinearly saturates, the phase velocity approaches that of the driver. The deleterious effects of the wake's dynamics on the maximum energy gain of accelerated electrons can be avoided using side-injections of electrons, or by controlling the wake's phase velocity by smooth plasma density gradients.

References in corpus (2)

• Self-modulation instability of a long proton bunch in plasmas
• Control of laser wake field acceleration by plasma density profile

Cited by in corpus (33)

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