Third-order double-achromat bunch compressors for broadband beams

Jonas Björklund Svensson,Sara Thorin,Olle Lundh,Tessa K Charles

doi:10.1103/physrevaccelbeams.22.104401

Abstract

Many state-of-the-art applications for linear accelerators, such as free-electron lasers (FELs) and plasma-wakefield accelerators (PWFAs), require small normalized emittances, and PWFAs in particular are very sensitive to transverse slice offsets along the beam. Dispersive systems, such as bunch compressors, can cause different chromatic aberrations, one of which yields transverse slice offsets. In this paper, we show a design approach to double-achromat bunch compressors which greatly reduces different chromatic aberrations and mitigates coherent synchrotron radiation effects.

Highlights

Bunch compressors (BCs) are an essential part of many linear electron accelerators and are vital for most state-ofthe-art applications, such as free-electron lasers (FELs), linear colliders (LCs) and beam-driven plasma-wakefield accelerators (PWFAs)
We show a design approach to double-achromat bunch compressors which greatly reduces different chromatic aberrations and mitigates coherent synchrotron radiation effects
Therein it is shown that controlled plasma density tapers, which are useful for matching the beam parameters from vacuum to plasma [8,9], are useful for mitigating hosing, and are likely to be implemented in future plasmawakefield accelerators (PWFAs) experiments

Summary

Introduction

Bunch compressors (BCs) are an essential part of many linear electron accelerators and are vital for most state-ofthe-art applications, such as free-electron lasers (FELs), linear colliders (LCs) and beam-driven plasma-wakefield accelerators (PWFAs). Dispersive systems, such as bunch compressors, can cause different chromatic aberrations, one of which yields transverse slice offsets.

Results

Conclusion