Würzburg 2018 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 8: Poster session
AKBP 8.13: Poster
Mittwoch, 21. März 2018, 18:00–19:30, NW-Bau - HS2
Intensity limits of DLA grating structures at relativistic energies — •Thilo Egenolf1, Uwe Niedermayer1, and Oliver Boine-Frankenheim1,2 — 1TEMF, TU Darmstadt, Schloßgartenstraße 8, 64289 Darmstadt, Germany — 2GSI, Planckstraße 1, 64291 Darmstadt, Germany
Dielectric Laser Acceleration (DLA) is an advanced electron accelerator concept reaching gradients significantly larger than conventional RF cavities. Recent experiments using dielectric nanostructures have demonstrated acceleration gradients of about 690 MeV/m. Due to the extremely small apertures, intensity effects caused by space charge and wakefields are critical limitations. To estimate the intensity limits at relativistic energies, we present simulations of the longitudinal wakefield for different DLA grating geometries and bunch properties. Based on these simulations, we calculate the beam loading intensity limit, where the energy loss equals the external energy gain. Additionally, we simulate the transverse wakefield for beam stability analysis. Furthermore, we outline the integration of a wake kick in our simplified 6D particle tracking code to study the beam dynamics in DLA gratings. The required single particle wake function is obtained by fitting analytical solutions of similar metallic geometries. For verification, we compare the tracking results to Particle-In-Cell simulations with commercial software.