  We investigate the pulse partitioning of a 6.3 mJ, 450 fs pulse at 1030 nm to
produce plasma channels. At such moderate energies, splitting the energy into
several sub-pulses reduces the ionization efficiency and thus does not extend
the plasma lifetime. We numerically show that when sufficient energy to produce
multifilamentation is available, splitting the pulse temporally in a pulse
train increases the gas temperature compared to a filament bundle of the same
energy. This could improve the mean free path of the free electrons, therefore
enhancing the efficiency of discharge triggering.
