Two electron atoms in strong field

We present a method to describe the interaction between a two-electron atom s and a strong laser field. In a first part, we calculate the atomic struct ure by expanding the radial part of atomic wave functions on a B-splines ba sis. We then evaluate the ionisation and the excitation by solving the time dependent Schrodinger equation. Results are shown for the helium atom as w ell as the H+ ion.