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- Title
Characteristics of betatron radiation in AWAKE Run 2 experiment.
- Authors
Liang, Linbo; Saberi, Hossein; Xia, Guoxing; Farmer, John Patrick; Pukhov, Alexander
- Abstract
The oscillating relativistic electrons in the accelerating/focusing wakefields of plasma accelerators emit electromagnetic radiation known as betatron radiation (BR). The proton-driven plasma wakefield acceleration has been demonstrated in the Advanced Wakefield Experiment (AWAKE) at CERN; however, its accompanying radiation emission is less explored compared with those in the laser- and electron beam-driven plasma accelerators. In this paper, a detailed simulation study of BR in the AWAKE is presented. Considering the new set-up of the AWAKE Run 2 (2021–), the radiation emission from both the witness electron beam and the seeding electron beam is investigated using particle-in-cell simulations. The influence of radial size mismatch and misaligned off-axis injection on the witness beam dynamics, as well as the spectral features of the relevant BR are studied. These non-ideal electron injections are likely to occur in experiment. The proton self-modulation stage is also investigated with a close look at the seeding electron beam dynamics and its BR. As a footprint of the emitting particles, BR can provide valuable information about the beam dynamics. Some practical challenges to implement the betatron diagnostic in the AWAKE Run 2 experiment are also addressed.
- Subjects
EUROPEAN Organization for Nuclear Research; BEAM dynamics; BETATRONS; RADIATION; ELECTROMAGNETIC radiation; PLASMA accelerators; ELECTRON beams
- Publication
Journal of Plasma Physics, 2023, Vol 89, Issue 3, p1
- ISSN
0022-3778
- Publication type
Article
- DOI
10.1017/S0022377823000491