Towards sub-10 meV energy resolution STEM-EELS

Magnetic circular dichroism in EELS: towards 10 nm resolution.

We describe a new experimental setup for the detection of magnetic circular dichroism with fast electrons (EMCD). As compared to earlier findings the signal is an order of magnitude higher, while the probed area could be significantly reduced, allowing a spatial resolution of better than 40 nm. A simplified analysis of the experimental results is based on the decomposition of the mixed dynamic ...

Recent Applications of Sub-20 meV Monochromated STEM-EELS : from Phonon to Core Losses in Real and Momentum Spaces

Atomic resolution mapping of phonon excitations in STEM-EELS experiments.

Atomically resolved electron energy-loss spectroscopy experiments are commonplace in modern aberration-corrected transmission electron microscopes. Energy resolution has also been increasing steadily with the continuous improvement of electron monochromators. Electronic excitations however are known to be delocalized due to the long range interaction of the charged accelerated electrons with th...

Exploring Phonon Signals by High Energy / High Spatial Resolution EELS

1 Nion Co., 1102 Eight St, Kirkland, WA 98033, USA 2 Center for Solid State Science, Arizona State University, Tempe, AZ 85287, USA 3 Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA 4 School for Engineering of Matter, Transport and Energy, ASU, Tempe, AZ 85287, USA 5 Department of Physics, ASU, Tempe, AZ 85287, USA 6 Department of Physics, University of ...

Energy device for monitoring 4-10 MeV industrial electron accelerators

The electron beam energy is one of the critical parameters of electron accelerators since it can affect the dose distribution inside the body or in products to be irradiated with a beam of energetic electrons. A device has been developed for monitoring small variations in the electron beam energy that is easy-to-use during an irradiation run. It involves measurement of currents (or charges) col...