Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch
arXiv:2010.05715 · doi:10.1103/PhysRevAccelBeams.24.011301
Abstract
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.
arXiv comment11 pages, 8 figures
References in corpus (21)
- Acceleration of electrons in the plasma wakefield of a proton bunch
- Proton Driven Plasma Wakefield Acceleration
- Self-modulation instability of a long proton bunch in plasmas
- BDSIM: An Accelerator Tracking Code with Particle-Matter Interactions
- Phase velocity and particle injection in a self-modulated proton-driven plasma wakefield accelerator
- Plasma Wakefield Acceleration with a Modulated Proton Bunch
- Experimental observation of proton bunch modulation in a plasma, at varying plasma densities
- Experimental observation of plasma wakefield growth driven by the seeded self-modulation of a proton bunch
- AWAKE readiness for the study of the seeded self-modulation of a 400\,GeV proton bunch
- The ion motion in self-modulated plasma wakefield accelerators
- Physics of beam self-modulation in plasma wakefield accelerators
- FLASHForward: Plasma-wakefield accelerator science for high-average-power applications
- Hosing Instability Suppression in Self-Modulated Plasma Wakefields
- Electron trapping and acceleration by the plasma wakefield of a self-modulating proton beam
- Ion motion in the wake driven by long particle bunches in plasmas
- Long-term evolution of broken wakefields in finite radius plasmas
- Interferometer-based high-accuracy white light measurement of neutral rubidium density and gradient at AWAKE
- A magnetic spectrometer to measure electron bunches accelerated at AWAKE
- Response of narrow cylindrical plasmas to dense charged particle beams
- First fully kinetic three-dimensional simulation of the AWAKE baseline scenario
- Accelerating field enhancement due to ion motion in plasma wakefield accelerators