Triggering and guiding electric discharge by a train of UV picosecond   pulses combined with a long UV pulse
  Non-self-sustained electric discharge and electric breakdown were triggered and guided by a train of picosecond UV pulses overlapped with a long free-running UV pulse of a hybrid Ti:Sapphire-KrF laser facility. Photocurrent sustained by this train is two orders of magnitude higher, and electric breakdown distance is twice longer than those for the discharge triggered by the long UV pulse only. 
A. A. Ionin, S. I. Kudryashov, A. O. Levchenko, L. V. Seleznev, A. V.   Shutov, D. V. Sinitsyn, I. V. Smetanin, N. N. Ustino...
physics.optics physics.plasm-ph