Peltier Cloud Chamber

   HI,

This is the Cloud Chamber I have built in about 2 weeks, I tried to keep it as simple as possible without using dry ice. This runs on 12 volts Dc 6.5-7amps , ice water, 50% alcohol mixed with 50% H2O on felt inside the top of the chamber, and high voltage DC set to 600 VDC to help clear the chamber but not needed.

·         PELTIER

CP1-12730

Imax 30(A),Umax 15.4(V),Tmax 68, Qmax 270.5

62.0mm x 62.0mm x 3.8 m

Used thermal silicone compound

·         HEAT SINK

5"X4"X2" High

With (4) .250 dia. Holes drilled thru under where the peltier sits also the holes are spot drilled,.5 deep .312 dia. For tubing and manifold. No room for fittings, the copper tubes for the manifold are pressed in, super glued and Epoxied, it makes a very tight solid seal with no leaks.

A cold plate sits on the top of the Peltier.,Insulation is built up to 3/8" above the Peltier.and all copper and heat sink is wrapped with foil insulation to keep the heat sink as cool as possible.

·         The Chamber

3.5" x 3.5" x 4" High with copper plate on top.

·         The Pump

To circulate the ice water, I'm using a garden pump

250 GPH with 5/8" inside dia. Output to feed the (4) .250 dia. Holes.

Here are the Latest Temperatures:

·       Water

-4 Degrees Celsius Next time I will add a little Na CI to the water to see if I can achieve a lower temp.

·       Top of Chamber

Copper Plate 21 Degrees Celsius

Cold plate top with a layer of black electrical tape, Ice water circulating, no chamber, and no power to Peltier 0 Degrees Celsius.

Cold plate top same as above ,Except power added 12 Vdc 7 amps after 20 minutes -54  Celsius ,- 65 Degrees Fahrenheit and no chamber.

·       Cold plate top

As above But under load  (with chamber) -38 Degrees Celsius

·       Radium watch hand

When I ran the test I seen Ionizing trails within 8 minutes

.

I will continue to test this chamber for improvements and post them. I would like to thank everyone for their help especially Markus, Eric and Geo.

Regards,

Jim & Jeannette.