https://doi.org/10.1051/epjconf/201920508015
Robust sub-50 fs cavity-laser phase stabilization for ultra-fast electron diffraction instruments
1 Department of Physics, Center for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec, Canada H3A 2T8
2 Department of Chemistry, McGill University, 801 Sherbrooke Street W, Montreal, Quebec, Canada H3A 0B8
* e-mail: bradley.siwick@mcgill.ca
Published online: 16 April 2019
A novel laser-RF cavity synchronization scheme was developed for ultrafast electron diffraction instruments. The approach directly generates a synchronized microwave tone by retrieving a phase-locked high-harmonic by photodetection. The radio-frequency cavity which performs electron pulse compression is detuning compensated using an active phase stabilization loop. Timing stability improved from 100 fs to 5 fs RMS and long-term time-zero stability improved to below our measurement resolution of 50 fs determined by pulse streaking.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
