Dischharges in gases

I prepared this simple nixie tube, because I would like to show how shining of tube depends on pressure and kind of gas.

Pressures and kind of gas
10-5 Torr -air
5x10-2 Torr- air
0,1 Torr- neon

1 Torr neon
25 Torr neon
100 Torr neon

There is film about discharges in gases:
Discharges in gases- mov file (ca. 10MB)

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