DOUBLE IONIZATION DYNAMICS OF LASER-DRIVEN HELIUM

Daniel Dundas, K.T. Taylor, Jonathan S. Parker and Edward S. Smyth

Department of Applied Mathematics and Theoretical Physics,  
The Queen's University of Belfast,
Belfast, BT7 1NN, N. Ireland.

We report a new method allowing sequential and non-sequential double
ionization rates in laser-driven helium to be distinguished and separately
calculated. The method is applied to calculate such rates for various
laser pulses.