While the armature is approaching completion, we have yet to test the electron gun which it holds. As described in earlier posts, it will consist of the cathode from an electron beam welder, a piece of copper tube for an accelerator anode, and a shard of phospher screen so that we can be sure it is actually shooting electrons.
This weekend, we will test a simplified version of this design. Instead of using the welder cathode, we use the tungsten filament from a broken light bulb, as suggested by Rehan:
Instead of using the phosphor screen, we will use the langmuir probe to detect the electrons.
In preparation, I have printed holders for the ceramic light bulb socket, and the accelerator anode so that the filament and the axis of the accelerator anode are on the same line with each other and with the tip of the langmuir probe.
Hopefully, this will work as a rudimentary way to inject electrons into the center of the reactor, deepening the potential well. If it does work, and we decide that we want an even deeper well, we will continue work on the original electron gun design.