This experiment had an identical wiring to the neon experiment. The main difference was the voltage settings for the DC Power Supply.

After adjusting the voltages until we were able to optimize the anode current verses the accelerating voltage graph, we ended up with these settings:

The only difference between the apparatus for neon (Fig. \ref{fig:appartus}) and argon is that an additional grounding wire was added between the filament and the accelerating voltage for argon. The lack of the wire resulted in a floating potential between these two points instead of being at the same potential. By simply adding a wire between the heater and the cathode, the problem was solved. However, the lack of connection could have possibly damaged the high voltage supply and the preamp. When we were debugging our experiment, the high voltage supply had a gain of 17V instead of 20V.