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Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch

Journal Article · · Physical Review Accelerators and Beams
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Plasma wakefield dynamics over timescales up to 800 ps, approximately 100 plasma periods, are studied experimentally at the Advanced Wakefield Experiment (AWAKE). The development of the longitudinal wakefield amplitude driven by a self-modulated proton bunch is measured using the external injection of witness electrons that sample the fields. In simulation, resonant excitation of the wakefield causes plasma electron trajectory crossing, resulting in the development of a potential outside the plasma boundary as electrons are transversely ejected. Trends consistent with the presence of this potential are experimentally measured and their dependence on wakefield amplitude are studied via seed laser timing scans and electron injection delay scans.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
European Research Council (ERC); German Federal Ministry of Education and Research; German Research Foundation (DFG); Leverhulme Trust; National Research Foundation of Korea; National Science Foundation (NSF); Portuguese Foundation for Science and Technology (FCT); Russian Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Contributing Organization:
AWAKE Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1768253
Journal Information:
Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Journal Issue: 1 Vol. 24; ISSN 2469-9888
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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