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Offlineplambe
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I want to build a cloud chamber with Americium-241 and an electromagnet
    #21517687 - 04/07/15 11:58 PM (9 years, 1 month ago)

Cloud chambers are chambers with saturated alcohol vapours maintained at low temperature. Anytime an ionizing particle travels through the vapours a trail is formed. Bigger particles like alpha particles leave fat short trails while beta particles (electrons, positrons) leave thinner longer trails.

So my idea is to build one such chamber and install an electromagnet inside it so that I can create a magnetic field on demand and watch it interact with the radioactive particles coming from the decay of Americium-241 which I plan on extracting from a smoke detector.

Does anyone have experience with cloud chambers. From what I've seen it seems rather simple to build one (idk why but I always thought cloud chambers are way more complex).


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Re: I want to build a cloud chamber with Americium-241 and an electromagnet [Re: plambe]
    #21518120 - 04/08/15 03:52 AM (9 years, 1 month ago)

Sounds like an air-tight container filled with ionic gas?

To make an electromagnet, just take a metal core (like a large bolt) and wrap wire around it many many times (the more coils, the more magnetism I believe). I forget the equations but that's the general idea; then you just send DC current through it in some kind of circuit.

The magnetic field will cause the electrons to shift.

They have cheap electronically controlled gas solenoid valves these days from China; you could probably play around with those >.>


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Offlineplambe
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Re: I want to build a cloud chamber with Americium-241 and an electromagnet [Re: micro]
    #21518937 - 04/08/15 10:42 AM (9 years, 1 month ago)

Nah, its simpler than that. Its not airtight, its just a glass chamber with saturated alcohol vapours cooled down to about -40°C. When an ionizng particle passes through the vapour it causes the vapour to condense leaving a linear cloud in its path. Its really cool, you can see radioactive decay in real time at home. I'll post videos when I get home.


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Offlineplambe
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Re: I want to build a cloud chamber with Americium-241 and an electromagnet [Re: plambe]
    #21519249 - 04/08/15 12:08 PM (9 years, 1 month ago)

Here is a good cloud chamber and many different sources of radiation.




Things that you need are a petri dish, black paper, isopropanol and dry ice. Of course a radioactive source would be good to have but it might be possible to observe background radiation too which is quite neat. Check out google or youtube for instructions.


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OfflineBambi
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Re: I want to build a cloud chamber with Americium-241 and an electromagnet [Re: plambe]
    #21519801 - 04/08/15 02:58 PM (9 years, 1 month ago)

That looks sick. Posting for reference and maybe to come back and do some research about when I have time. Keep us posted OP


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