Göttingen 2025 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 4: AKBP Posters
AKBP 4.3: Poster
Dienstag, 1. April 2025, 16:30–18:00, ZHG Foyer 1. OG
Towards three-dimensional confinement of the electron beam inside dielectric laser accelerators — •Manuel Konrad1, Julian Freier1, Stefanie Kraus1, Leon Brückner1, Julian Litzel1, Tomas Chlouba1,2, Roy Shiloh1,3, and Peter Hommelhoff1,4 — 1Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen — 2Center for Nanophotonics, AMOLF, 1098 XG Amsterdam — 3Institute of Applied Physics, Hebrew University of Jerusalem (HUJI), Jerusalem, Israel — 4Department Physik, Ludwig-Maximilians-Universität München (LMU), 80799 München
Dielectric laser accelerators are the optical counterpart to classical RF-accelerators. Here, nanophotonic dielectric structures are illuminated by ultrashort laser pulses to create the accelerating modes. Alternating phase focusing (APF) is employed to confine the electron beam inside the acceleration channel [1]. After we successfully applied this concept to gain phase space control over the electrons in the longitudinal and one transverse direction [2], we have recently shown acceleration of electrons in combination with APF. By keeping the beam confined in a 500 µm long structure, we accelerated the electrons from 28.4 to 40.7 keV in a scanning electron microscope [3]. We will show how the APF scheme can be expanded to full 3D confinement and discuss how it is affected by illuminating the structure from the top.
[1] Niedermayer et al., PRL 121, 214801 (2018) [2] Shiloh et al., Nature 597, 498 (2021) [3] Chlouba et al., Nature, 622, 476 (2023)
Keywords: Dielectric; Laser; nanophotonic; Alternating phase focusing; Confinement