First experiments with cathode glow!

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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.