Multi-Dimensional Phase Space Manipulation for Attosecond Electron Bunch Compression

TL;DR

This paper introduces a new method combining THz-driven energy chirping and multidimensional phase-space manipulation to achieve attosecond electron bunch compression with high timing precision, advancing ultrafast science capabilities.

Contribution

The authors develop a robust technique for compressing electron bunches to attosecond durations using multidimensional phase-space manipulation, demonstrated in an MeV electron diffraction setup.

Findings

Compressed 50 fs electron bunches to 810 as duration

Achieved 850 as arrival-time jitter

Retained 6 fC of charge after compression

Abstract

Attosecond electron beams are essential for investigating ultrafast structural and electronic dynamics in matter with atomic-scale resolution. We propose a novel method that enables robust attosecond-level electron bunch compression. This method employs THz-driven linear energy chirping and multidimensional phase-space manipulation, effectively compressing the electron bunch and suppressing its arrival timing jitter. Implemented in an MeV ultrafast electron diffraction beamline, this method compresses a 3~MeV, 0.1~pC electron beam from an initial duration of 50~fs to 810~as while retaining 6~fC of charge, with 850~as arrival-time jitter. This approach enables unprecedented timing resolution in ultrafast sciences and offers significant potential for other accelerator applications involving attosecond-scale electron beams.