Analysis of Proton Bunch Parameters in the AWAKE Experiment

Abstract

A precise characterization of the incoming proton bunch parameters is required to accurately simulate the self-modulation process in the Advanced Wakefield Experiment (AWAKE). This paper presents an analysis of the parameters of the incoming proton bunches used in the later stages of the AWAKE Run 1 data-taking period. The transverse structure of the bunch is observed at multiple positions along the beamline using scintillating or optical transition radiation screens. The parameters of a model that describes the bunch transverse dimensions and divergence are fitted to represent the observed data using Bayesian inference. The analysis is tested on simulated data and then applied to the experimental data.

References in corpus (8)

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• Proton Driven Plasma Wakefield Acceleration
• Self-modulation instability of a long proton bunch in plasmas
• AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN
• Experimental observation of proton bunch modulation in a plasma, at varying plasma densities
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• A Rubidium Vapor Source for a Plasma Source for AWAKE