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

, AWAKE Collaboration (2021) Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma. Physical review letters, 126 (16). ISSN 1079-7114

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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:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
155165
Deposited By:
Deposited On:
11 Jun 2021 10:25
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Jul 2021 06:22