Few-femtosecond Electron Beam with THz-frequency Wakefield-driven Compression

Abstract

We propose and demonstrate a novel method to produce few-femtosecond electron beam with relatively low timing jitter. In this method a relativistic electron beam is compressed from about 150 fs (rms) to about 7 fs (rms, upper limit) with the wakefield at THz frequency produced by a leading drive beam in a dielectric tube. By imprinting the energy chirp in a passive way, we demonstrate through laser-driven THz streaking technique that no additional timing jitter with respect to an external laser is introduced in this bunch compression process, a prominent advantage over the conventional method using radio-frequency bunchers. We expect that this passive bunching technique may enable new opportunities in many ultrashort-beam based advanced applications such as ultrafast electron diffraction and plasma wakefield acceleration.

arXiv comment5 pages, 4 figures

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Cited by in corpus (6)

• Femtosecond compression dynamics and timing jitter suppression in a terahertz-driven electron bunch compressor
• Ultrafast Relativistic Electron Nanoprobes
• Bunch Shaping in Electron Linear Accelerators
• Parallel-Plate Waveguides for Terahertz-Driven MeV Electron Bunch Compression
• Longitudinal phase space synthesis with tailored 3D-printable dielectric-lined waveguides
• Longitudinal current profile reconstruction from wakefield response in plasmas and structures