Hannover 2010 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 27: Ultrashort Laser Pulses: Applications I
Q 27.4: Talk
Wednesday, March 10, 2010, 11:15–11:30, F 342
Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry — •Alexander Debus1, Michael Bussmann1, Ulrich Schramm1, Roland Sauerbrey1, and Stefan Karsch2 — 1Forschungzentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328 Dresden, Germany — 2Max-Planck-Institute für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany
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 0.5J, 45fs, 800nm laser and a ZnTe-based electro-optical setup we demonstrate the duration of laser-accelerated, quasi-monoenergetic electron bunches at a best fit of 32fs (FWHM) with a 90% upper confidence level of 38fs.