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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 Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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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.