A mode-locked tunable Ti:Sapphire oscillator has been synchronized with the time structure of a storage ring and used to study the photoionization of noble gases. In multi-bunch operation of the ring the setup permits the observation of the dynamics from a few nanoseconds down to the tens of picoseconds range. The characteristics of the setup are demonstrated by following the two-color ionization of helium (via the 1s3p
1P
o state) and argon (via the 3p
5 (
2P
3/2) 3d state). In the CW mode we have also examined the two-color ionization of neon via the 2p
5 (
2P
1/2) 3d′ state. In neon the
nf′ Rydberg series was followed up to
n![not, vert, similar not, vert, similar](http://www.sciencedirect.com/scidirimg/entities/223c.gif)
50, and the quantum defect was determined.