Emittance preservation in a plasma-wakefield accelerator

Abstract

Radio-frequency particle accelerators are engines of discovery, powering high-energy physics and photon science, but are also large and expensive due to their limited accelerating fields. Plasma-wakefield accelerators (PWFAs) provide orders-of-magnitude stronger fields in the charge-density wave behind a particle bunch travelling in a plasma, promising particle accelerators of greatly reduced size and cost. However, PWFAs can easily degrade the beam quality of the bunches they accelerate. Emittance, which determines how tightly beams can be focused, is a critical beam quality in for instance colliders and free-electron lasers, but is particularly prone to degradation. We demonstrate, for the first time, emittance preservation in a high-gradient and high-efficiency PWFA while simultaneously preserving charge and energy spread. This establishes that PWFAs can accelerate without degradation$\unicode{x2014}$essential for energy boosters in photon science and multistage facilities for compact high-energy particle colliders.

9 pages, 4 figures, 11 supplementary figures

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Cited by in corpus (5)

• Energy Depletion and Re-Acceleration of Driver Electrons in a Plasma-Wakefield Accelerator
• Plasma lens for focusing attosecond pulses
• Slice Emittance Preservation and Focus Control in a Passive Plasma Lens
• A dump leakage calorimeter to measure the flux of high-energy electrons and photons
• Deployment and validation of predictive 6-dimensional beam diagnostics through generative reconstruction with standard accelerator elements