Synchronization of a mode-locked Ar+ laser with the synchrotron radiation: application to the two-photon ionization (VUV + visible) of heliumL. Nahon, J. Lacoursière, M. Meyer, M. Larzillière and P. MorinAnn. Phys. Fr., 19 (1994) C1-161-C1-162DOI: https://doi.org/10.1051/anphys/1994035