Here is a video of our high power plasma rifle in action
Step 1: Constructing the plasma rifle
Simply watch the embedded video for instructions
Step 2: Construction tips
Basically the whole point is to short circuit the capacitors across the steel wool inside of the barrel. For a low power cannon, the electrodes can simply be 2 wires stuck into the back of the barrel. Higher power cannons will require stronger construction techniques. Beyond a couple joules, wires cant really be used as the electrodes because they will begin to vaporize along with the steel wool. In a larger version i used 2 stainless steel rods approximately 3/16" thick. i ground the bottom of the rods to a nearly flat surface, then i drilled a 3/16" hole through a block of teflon that transects a .3" hole for the aluminum barrel. I sealed the breach with a lexan plate and a neoprene gasket. the 2 steel rods were inserted into their respective holes and were connected to 8 gauge copper wires running directly to the capacitor bank.