@article{Toyota19, author={Koudai Toyota and Zoltan Jurek and Sang-Kil Son and Hironobu Fukuzawa and Kiyoshi Ueda and Nora Berrah and Benedikt Rudek and Daniel Rolles and Artem Rudenko and Robin Santra}, title={\emph{xcalib}: a focal spot calibrator for intense X-ray free-electron laser pulses based on the charge state distributions of light atoms}, journal={J. Synchrotron Radiat.}, volume={26}, pages={1017--1030}, year={2019}, keywords={XCALIB; XATOM; Ar; CFEL; DESY; XFEL; LCLS; SACLA;}, url={https://doi.org/10.1107/S1600577519003564}, doi={10.1107/S1600577519003564}
}