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Experimental study of wakefields driven by a self-modulating proton bunch in plasma

Turner, M; Muggli, P; Adli, E; Agnello, R; Aladi, M; Andrebe, Y; Apsimon, O; ... Della Porta, GZ; + view all (2020) Experimental study of wakefields driven by a self-modulating proton bunch in plasma. Physical Review Accelerators and Beams , 23 (8) , Article 081302. 10.1103/PhysRevAccelBeams.23.081302. Green open access

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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).

Type: Article
Title: Experimental study of wakefields driven by a self-modulating proton bunch in plasma
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevAccelBeams.23.081302
Publisher version: https://doi.org/10.1103/PhysRevAccelBeams.23.08130...
Language: English
Additional information: © 2020 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10108697
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