Direct, absolute, and in situ measurement of fast electron transport via Cherenkov emission
Related Experiment Video
Updated: Jun 14, 2026

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
Hideaki Habara1, Kazuhide Ohta, Kazuo A Tanaka
1Graduate School of Engineering, Osaka University, 2-1 Suita, 565-0871, Osaka, Japan.
Abstract:
We present direct measurements of the absolute energy distribution of relativistic electrons generated in intense, femtosecond laser interaction with a solid. Cherenkov emission radiated by these electrons in a novel prism target is spectrally dispersed to obtain yield and energy distribution of electrons simultaneously. A crucial advance is the observation of high density electron current as predicted by particle simulations and its transport as it happens inside the target. In addition, the strong sheath potential present at the rear side of the target is inferred from a comparison of the electron spectra derived from Cherenkov light observation with that from a magnet spectrometer.
Related Concept Videos
Atomic Emission Spectroscopy: Instrumentation
Fast Reactions

