The effect of array configuration on current distribution in a wire array Z-pinch

The results of experiments that changed the current distribution inside the radius of an array, or between the wires of an array, are presented. Use of a low number of wires (4), Ni wires, or the introduction of a pre-pulse current to the array all resulted in the pre-cursor plasma on axis displaying MHD like instabilities. Implosion dynamics were affected in a consistent manner, with the arrays imploding later than expected. In arrays made from alternating Al and W wires, current was initially concentrated around the Al wires. When the Al wires started to implode, current was switched to the W wires, producing a 2 stage implosion.