I have successfully done my first experiments with vacuum and gas discharge.. It was quite simple, the vacuum pump is much powerful I expected.. I work only with air, I have no noble gas available yet.. There is a short video I made today. First, I turned on a HV power supply, then the pump is turned on, as the pressure in a glass bottle gets lower, the glow changes..
Common glass bottle, one hole for air-evacuation tube, one for cathode wire, all sealed by hot glue. I used the lid as an anode.