Long pulse excimer lasers are of interest as a means for increasing, with constant energy, the impulse coupled to a target. The reduced power associated with the long pulse width also increases the laser optics damage threshold. A direct e-beam pumped XeC1 laser has been operated with a 5 p's pulse length. The e-beam pump is a cold cathode, large area diode which has operated up to 10 μs pulse width. Fuel burn-up of the halogen donor occurs at approximately the same specific pump energy (J/ℓ ) observed with microsecond pulse lengths.