Related Experiment Video
Updated: May 21, 2026

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
Published on: October 23, 2018
Full characterization of RF compressed femtosecond electron pulses using ponderomotive scattering
Meng Gao1, Hubert Jean-Ruel, Ryan R Cooney
1Institute of Optical Sciences and Department of Physics and Chemistry, University of Toronto, 80 St George St, Toronto, ON M5S3H6, Canada.
Abstract:
High bunch charge, femtosecond, electron pulses were generated using a 95 kV electron gun with an S-band RF rebunching cavity. Laser ponderomotive scattering in a counter-propagating beam geometry is shown to provide high sensitivity with the prerequisite spatial and temporal resolution to fully characterize, in situ, both the temporal profile of the electron pulses and RF time timing jitter. With the current beam parameters, we determined a temporal Instrument Response Function (IRF) of 430 fs FWHM. The overall performance of our system is illustrated through the high-quality diffraction data obtained for the measurement of the electron-phonon relaxation dynamics for Si (001).
Related Concept Videos
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
Electromagnetic Waves in Matter
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore, the...
Scanning Electron Microscopy
Fundamental Principles
Accelerated...
Transmission Electron Microscopy
