Speaker
Description
Recent developments in ultra-low emittance electron beam generation offer compact, high-quality particle sources for future high-energy physics and free-electron laser applications. Measuring such excellent emittances poses a significant challenge.
Here we present a new, laser-based technique which modulates the electron phase-space ponderomotively, achieving sub-0.1 mm mrad emittance resolution. We report the first experimental validation of this approach using a laser wakefield accelerator. Our results are in agreement with emittance and source size values of prior studies using different methods such as quadrupole scans. Additionally, we demonstrate that the "laser-grating" method provides upper limits on emittance and source size, even under conditions of low signal-to-noise ratio and uncertainties in laser-grating parameters.
