MULTIBEAM LASER DEFLECTION MEASUREMENTS OF REDUCED DENSITY CHANNELS CREATED BY ELECTRON-BEAMS PROPAGATING IN NEAR-ATMOSPHERIC-PRESSURE AIR

Properties of reduced density channels created by energy deposition fr om electron beams propagating in air are presented. A multi-beam laser deflection technique used to diagnose the channels is described, as a re representative examples of density channels formed in multi-pulse p ropagation experiments performed at the Advanced Test Accelerator at t he Lawrence Livermore National Laboratory.