Experimental Study of Wakefields Driven by a Self-Modulating Proton Bunch in Plasma

Abstract

We study experimentally the longitudinal and transverse wakefields driven by a highly relativistic proton bunch during self-modulation in plasma. We show that the wakefields' growth and amplitude increase with increasing seed amplitude as well as with the proton bunch charge in the plasma. We study transverse wakefields using the maximum radius of the proton bunch distribution measured on a screen downstream from the plasma. We study longitudinal wakefields by externally injecting electrons and measuring their final energy. Measurements agree with trends predicted by theory and numerical simulations and validate our understanding of the development of self-modulation. Experiments were performed in the context of the Advanced Wakefield Experiment (AWAKE).

4 figures

References in corpus (20)

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Cited by in corpus (4)

• Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma
• Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma
• Proton Bunch Self-Modulation in Plasma with Density Gradient
• Wakefield decay in a radially bounded plasma due to formation of electron halo