Formation of Temporally Shaped Electron Bunches for Beam-Driven Collinear Wakefield Accelerators

TL;DR

This paper proposes a novel method to generate temporally shaped electron bunches with asymmetric profiles and energy chirp, enhancing the efficiency and repetition rate of beam-driven collinear wakefield accelerators.

Contribution

A new approach for producing tailored electron bunches without collimators, supported by particle tracking simulations, advancing the practical application of CWAs.

Findings

Achieved desired particle distribution in phase space

Eliminated the need for collimators in bunch shaping

Supported by particle tracking simulations

Abstract

Beam-driven collinear wakefield accelerators (CWAs) that operate by using slow-wave structures or plasmas hold great promise toward reducing the size of contemporary accelerators. Sustainable acceleration of charged particles to high energies in the CWA relies on using field-generating relativistic electron bunches with a highly asymmetric peak current profile and a large energy chirp. A new approach to obtaining such bunches has been proposed and illustrated with the accelerator design supported by particle tracking simulations. It has been shown that the required particle distribution in the longitudinal phase space can be obtained without collimators, giving CWAs an opportunity for employment in applications requiring a high repetition rate of operation.