Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma.



Batsch, F, Muggli, P, Agnello, R, Ahdida, CC, Amoedo Goncalves, MC, Andrebe, Y, Apsimon, O, Apsimon, R, Bachmann, A-M, Baistrukov, MA
et al (show 88 more authors) (2021) Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma. Physical review letters, 126 (16).

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Abstract

We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4)  MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2π) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated.

Item Type: Article
Uncontrolled Keywords: AWAKE Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 17 May 2021 10:29
Last Modified: 14 Oct 2021 12:09
DOI: 10.1103/physrevlett.126.164802
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3123038