Darmstadt 2016 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 13: PWA, DLA, Thomson and Compton Scattering
AKBP 13.7: Vortrag
Donnerstag, 17. März 2016, 15:30–15:45, S1/05 24
Measuring of ultrashort electron bunch durations from Laser-wakefield accelerators via a broadband, single-shot spectrometer. — •Omid Zarini1,2, Jurjen Couperus1,2, Alexander Köhler1,2, Axel Jochmann1, Alexander Debus1, Arie Irman1, and Ulrich Schramm1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf — 2Technische Universität Dresden
Laser-wakefield accelerators (LWFA) feature electron bunch durations ranging from several fs to tens of fs. Due to the nonlinear nature of the injection and acceleration process in such accelerators, small changes in experimental conditions lead to the electron bunch properties which are often subject to large shot-to-shot variations. Single-shot measurement of a broadband coherent and incoherent transition radiation produced by the LWFA electron bunches is a promising way to deduce the longitudinal structure of such bunches. In this talk we present results from our recent measurement campaign by analyzing transition radiation spectra produced as LWFA electron bunches pass a metal foil. We investigate electron bunch longitudinal structure generating from different acceleration regimes, i.e., ionization-injection and self-injection. Knowledge and control of the electron bunch duration is essential for the design of future table-top and x-ray light-sources.