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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry

Debus, A. and Bussman, M. and Schramm, Ulrich and Sauerbrey, R. and Murphy, C.D. and Major, Zs. and Hörlein, R. and Veisz, L. and Gallacher, Jordan Gerard and Jaroszynski, D.A. (2010) Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry. Physical Review Letters, 104 (8). ISSN 0031-9007

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Abstract

Laser-plasma wakefield-based electron accelerators are expected to deliver ultrashort electron bunches with unprecedented peak currents. However, their actual pulse duration has never been directly measured in a single-shot experiment. We present measurements of the ultrashort duration of such electron bunches by means of THz time-domain interferometry. With data obtained using a 0.5 J, 45 fs, 800 nm laser and a ZnTe-based electro-optical setup, we demonstrate the duration of laser-accelerated, quasimonoenergetic electron bunches [best fit of 32 fs (FWHM) with a 90% upper confidence level of 38 fs] to be shorter than the drive laser pulse, but similar to the plasma period.