München 2019 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 15: Poster session
AKBP 15.2: Poster
Donnerstag, 21. März 2019, 16:30–18:00, Durchgangshalle
Wakefield Tracking in Dielectric Laser Acceleration Grating Structures — •Thilo Egenolf1, Uwe Niedermayer1, and Oliver Boine-Frankenheim1,2 — 1Institut für Teilchenbeschleunigung und elektromagnetische Felder, TU Darmstadt, Schloßgartenstraße 8, 64289 Darmstadt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
Dielectric laser accelerators contain nanostructures, where electrons are accelerated in the near field of a laser. The features of such grating structures are in the submicrometer range in order to fulfill the constraints given by the optical wavelength of the drive laser. This limits also the feasible bunch length and aperture size leading to critical intensity effects caused by wakefields. To investigate these effects on relativistic electron bunches, we present tracking results of our simplified particle tracking code DLAtrack6D with recently added non-linear wakefield kicks. Longitudinal effects associated with energy loss as well as transverse effects are analyzed and quantitative intensity limits given by beam loading or transverse beam breakup are calculated. These tracking results of three-dimensional bunch distributions are compared to analytical estimations of a centered linecharge. Furthermore, we verify the underlying wakefield simulation results by scaled experimental data of SwissFEL at the Paul Scherrer Institute.