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Multi-Dimensional Phase Space Manipulation for Attosecond Electron Bunch Compression
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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.
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Sub-5-fs compression and synchronization of relativistic electron bunches enabled by a high-gradient $\alpha$-magnet and low-jitter photoinjector
A tailored high-gradient alpha-magnet plus a low-jitter photoinjector simultaneously compress relativistic electron bunches to sub-5-fs rms duration and synchronize them to a laser at the few-fs level, per the authors...
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