Witness emittance growth caused by driver density fluctuations in plasma wakefield accelerators
arXiv:1807.04423 · doi:10.1063/1.5048263
Abstract
We discovered a novel effect that can cause witness emittance growth in plasma wakefield accelerators. The effect appears in linear or moderately nonlinear plasma waves. The witness experiences a time-varying focusing force and loses quality during the time required for the drive beam to reach transverse equilibrium with the plasma wave. The higher the witness charge, the lower the emittance growth rate because of additional focusing of the witness by its own wakefield. However, the witness head always degrades, and the boundary between degraded and intact parts gradually propagates backward along the witness bunch.
arXiv comment7 pages 13 figures
References in corpus (16)
- Developments in laser-driven plasma accelerators
- Acceleration of electrons in the plasma wakefield of a proton bunch
- Self-modulation instability of a long proton bunch in plasmas
- Exact phase space matching for staging plasma and traditional accelerator components using longitudinally tailored plasma profiles
- AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN
- Experimental observation of proton bunch modulation in a plasma, at varying plasma densities
- Path to AWAKE: Evolution of the concept
- AWAKE readiness for the study of the seeded self-modulation of a 400\,GeV proton bunch
- Physics of beam self-modulation in plasma wakefield accelerators
- LCODE: a parallel quasistatic code for computationally heavy problems of plasma wakefield acceleration
- A Rubidium Vapor Source for a Plasma Source for AWAKE
- Emittance preservation of an electron beam in a loaded quasi-linear plasma wakefield
- Excitation of two-dimensional plasma wakefields by trains of equidistant particle bunches
- Electron trapping and acceleration by the plasma wakefield of a self-modulating proton beam
- Optimum angle for side injection of electrons into linear plasma wakefields
- Radial equilibrium of relativistic particle bunches in plasma wakefield accelerators