A pump-probe XFEL particle injector for hydrated samples
Abstract
We have developed a liquid jet injector system that can be used for hydrated sample delivery at X-ray Free Electron Laser (XFEL) sources and 3rd generation synchrotron sources. The injector is based on the Gas Dynamic Virtual Nozzle (GDVN), which generates a liquid jet with diameter ranging from 300 nm to 20 {\mu}m without the clogging problems associated with conventional Rayleigh jets. An improved nozzle design is presented here. A differential pumping system protects the vacuum chamber and an in-vacuum microscope allows observation of the liquid jet for diagnostics while it is being exposed to the X-ray beam. A fiber optically coupled pump laser illuminating the jet is incorporated for pump-probe experiments. First results with this injector system have been obtained at the LCLS.
Keywords
Cite
@article{arxiv.1105.2104,
title = {A pump-probe XFEL particle injector for hydrated samples},
author = {U. Weierstall and R. B. Doak and J. C. H. Spence},
journal= {arXiv preprint arXiv:1105.2104},
year = {2011}
}
Comments
16 pages, 15 figures