Please note that this is a prototype and not a final version.
This is a compressor cooled (like a fridge) cloud chamber.

Visible area is 32x18 cm. It can works for hours without any assistance. There is a magnetic field under the surface which deflect the light particles. You can see that when an electron makes a spiral.

www.cloudylabs.fr

After 8 h run:    • after8hofrun