Thema der Dissertation:
A high-repetition-rate ultrafast electron diffraction setup with direct detection for solid-state samples
A high-repetition-rate ultrafast electron diffraction setup with direct detection for solid-state samples
Abstract: Ultrafast electron diffraction (UED) is a cutting-edge technique that enables unique spatial and temporal resolution of photo-induced dynamic processes in condensed matter. This work presents an in-depth description and analysis of the optical configuration and commissioning of a high repetition rate, keV- UED instrument with single electron sensitivity. The setup features a stable, high-performance electron beam and a direct electron detector equipped with an advanced correction algorithm, allowing for precise, time-resolved investigations of atomic-scale structural changes. Experiments demonstrate the instrument’s ability to track, with excellent temporal and spatial resolution, a wide range of ultrafast processes as photo-induced plasma lensing, electron-phonon dynamics in nonthermal lattice distortion in metallic thin-film. Furthermore, a radio-frequency electron-pulse compression system was integrated to further enhance timing precision, supporting robust studies of rapid structural changes in materials.
Zeit & Ort
16.01.2026 | 15:00
Hörsaal B (0.1.01)
(Fachbereich Physik, Arnimallee 14, 14195 Berlin)