Professor Siwick has made a series of pioneering contributions to ultrafast electron diffraction, scattering (UED/S) and microscopy, and the application of these methods to diverse problems in materials physics. Specifically, Siwick was responsible for generating the insights that overcame the space-charge problem previously preventing high-brightness UED/S experiments with femtosecond time resolution, performing the first femtosecond time resolution “molecular movie” in 2003. Since that time he has been continuously developing new instrumentation technologies based on ultrashort electron pulses, including the application of RF cavity-based electron pulse compression methods to lab-scale UED/S. In 2010 Siwick co-founded (with Prof. R.J.D. Miller) the Banff Meeting on Structural Dynamics, which has become a major international forum for ultrafast science using x-rays and electrons. He is currently Associate Editor of ‘Structural Dynamics’, which focuses on the recent developments in experimental/theoretical methods and techniques that provide a visualization of the electronic and geometric structural changes in real time of chemical, biological, and condensed-matter systems.
Tentative Talk Title: Time and Momentum-Resolved Phonon Population Dynamics with Ultrafast Electron Diffuse Scattering
Group website: http://www.physics.mcgill.ca/~siwick/