Physics of beam self-modulation in plasma wakefield accelerators
K.V. Lotov
TL;DR
This paper investigates the nonlinear development of beam self-modulation in plasma wakefield accelerators, identifying optimal plasma density step parameters for stable wakefield generation using proton beams.
Contribution
It provides numerical analysis of self-modulation in uniform and stepped plasmas, revealing conditions for strongest wakefields and mechanisms for stable bunch train formation.
Findings
Optimal plasma density step parameters for maximum wakefield strength
Mechanism of stable bunch train formation identified
Nonlinear stages of beam evolution characterized
Abstract
The self-modulation instability is a key effect that makes possible the usage of nowadays proton beams as drivers for plasma wakefield acceleration. Development of the instability in uniform plasmas and in plasmas with a small density up-step is numerically studied with the focus at nonlinear stages of beam evolution. The step parameters providing the strongest established wakefield are found, and the mechanism of stable bunch train formation is identified.
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