Darmstadt 2016 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 13: PWA, DLA, Thomson and Compton Scattering

AKBP 13.4: Vortrag

Donnerstag, 17. März 2016, 14:45–15:00, S1/05 24

Application of dielectric laser acceleration technique for temporal and spatial characterization of charged particle beams — •Martin Kozák, Joshua McNeur, Norbert Schönenberger, Alex Tafel, Ang Li, and Peter Hommelhoff — Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstrasse 1, 91058 Erlangen, Germany, EU

In this contribution we show the use of dielectric laser acceleration for sub-optical cycle temporal gating and transverse streaking of free electrons at sub-relativistic energies (25-30 keV). Utilizing the inverse Smith-Purcell effect [1,2], the energy and/or transverse momentum of electrons are modulated by the interaction with near-fields of a dielectric nanostructure. The sub-cycle temporal structure of the femtosecond laser pulse is transferred to the electron beam. Combined with high-pass energy filtering of accelerated electrons, this allows us to achieve temporal resolution of 1.3 fs. This technique can have direct applications in ultrafast diffraction and microscopy or as a tool for temporal characterization of attosecond particle bunches, potentially offering 10 as temporal resolution. Moreover, the sub-wavelength spatial decay of optical near-fields at the nanostructure can be used for beam position monitoring applications with spatial resolution better than 500 nm.

[1] J. Breuer, and P. Hommelhoff, Phys. Rev. Lett. 111, 134803 (2013). [2] E. A. Peralta, et al. Nature 503, 91-94 (2013).