3 papers
physics.app-ph2024
Influence of Photoemission Geometry on Timing and Efficiency in 4D Ultrafast Electron Microscopy
Simon A. Willis, David J. Flannigan
Broader adoption of 4D ultrafast electron microscopy (UEM) for the study of chemical, materials, and quantum systems is being driven by development of new instruments as well as co…
cond-mat.mtrl-sci2024
Relative Time-of-Flight Measurement in an Ultrafast Electron Microscope
Jialiang Chen, Simon A. Willis, David J. Flannigan
Efforts to push the spatiotemporal imaging-resolution limits of femtosecond (fs) laser-driven ultrafast electron microscopes (UEMs) to the combined angstrom-fs range will benefit f…
cond-mat.mtrl-sci2024
Wehnelt Photoemission in an Ultrafast Electron Microscope: Stability and Usability
Simon A. Willis, Wyatt A. Curtis, David J. Flannigan
We tested and compared the stability and usability of three different cathode materials and configurations in a thermionic-based ultrafast electron microscope: (1) on-axis thermion…