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.