High efficiency uniform wakefield acceleration of a positron beam using stable asymmetric mode in a hollow channel plasma

Abstract

Plasma wakefield acceleration in the blowout regime is particularly promising for high-energy acceleration of electron beams because of its potential to simultaneously provide large acceleration gradients and high energy transfer efficiency while maintaining excellent beam quality. However, no equivalent regime for positron acceleration in plasma wakes has been discovered to-date. We show that after a short propagation distance, an asymmetric electron beam drives a stable wakefield in a hollow plasma channel that can be both accelerating and focusing for a positron beam. A high charge positron bunch placed at a suitable distance behind the drive bunch can beam-load or flatten the longitudinal wakefield and enhance the transverse focusing force, leading to high-efficiency and narrow energy spread acceleration of the positrons. Three-dimensional quasi-static particle-in-cell (PIC) simulations show that over 30% energy extraction efficiency from the wake to the positrons and 1% level energy spread can be simultaneously obtained, and further optimization is feasible.

References in corpus (4)

• Acceleration of electrons in the plasma wakefield of a proton bunch
• Positron acceleration by plasma wake fields driven by a hollow electron beam
• Measurement of transverse wakefields induced by a misaligned positron bunch in a hollow channel plasma accelerator
• Crunch-in regime - Non-linearly driven hollow-channel plasma

Cited by in corpus (6)

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• Self-stabilizing positron acceleration in a plasma column
• High efficiency uniform positron beam loading in a hollow channel plasma wakefield accelerator
• Acceleration and focusing of positron bunch in a dielectric waveguide accelerator with homogeneous plasma in transport channel
• Flat bubble regime and laminar plasma flow in a plasma wake field accelerator
• Generation of arbitrarily polarized muon pairs via polarized $e^{-}{e}^{+}$ collision