Today I began fabricating the Langmuir probe.
I am using a tungsten light bulb filament as the probe tip:
The rest is just ceramic tubing to hold it in place. The filament is so thin and so fragile.
I use insulating varnish to hold it all together. I have to let this cure over night:
This will attach to the feedthrough:
The Langmuir probe will show the floating potential of the plasma… The dependent variable in the Sydney Experiment.