Latest round of design tweaks + some slow motion footage:
omg, the quality of track in the beggining is the same i saw in the museum ! i can't believe it ! it's really a true joy to see this spectacle! the uranium ore seems to be alive ! it's so exciting ! the track which we look are electron, and alpha which dont go far away. But i don't know what kind of particle are the thinier track, thick as an hair ? maybe electron which don't go much in the supersaturated layer+
how much alcohol did you pour in the bottom? do you know the temperature near the fiber glass ?at 2:04, is it some black sponge in the top of container ?congrats !!!
didn't poor any alcohol on the bottom – it just pools there on its own after a few minutes.
fiberglass itself is about -40f – not sure about the air above it.
I think the "black sponge" is actually felt (that segment of the video is from a slightly different setup than the one pictured – where I had some alcohol soaked felt on the sides as opposed to the round felt pads)
Why need two different peltier elements? If top and bottom are same – chamber not works?
@anonymous – it can work with identical peltiers – just it works better if the top pelt is less powerful. the top pelt -must- be run at a lower voltage (around 5v vs 12v) for stuff to work. this has to do with excess heat generated causing a cascade (bottom pelt has to pump all heat generated by top pelt)
Hmm … I cant understand – Why?Diffusion chamber can overcooled?Or problem is power source? – in "How to build" is words "At least 8 Amps" but in Peltier datasheet for 12709 is "max 9 Amps". When connected paralel two Peltiers its may be 18 Amps … Power source have only 8 Amps. Possibly it is problem?Or temperature lover -15 farenheit is to cold?
colder is better. the problem is using the same size pelts at same voltage will result in less cooling than a single pelt.
pelts both pump and create heat – they are not perfectly efficient.
so top pelt can pump X amount of heat – but also makes Y amount of heat.
so – the bottom pelt has to pump X+Y amount of heat. so – it has to be larger than the top pelt (or at least run at a higher voltage).
it took me a while to figure this out…
Ok, my sixth sense say – You right. To more cold we need remove all heat of top element warm side move out.
In "how to build" is "static source – styrofoam cup" – how it works?
lots of cloud chambers specify a high voltage source – this seems to help clear ions from the chamber – and especially helps see alpha particles
i've found rubbing a styrofoam cup or ballon in your hair – then placing it atop the chamber provides the same effect – and is easier / cheaper to setup (a real high voltage source may work better)
Polarity of high voltage is any?I can placed charged beer can (metalic)? This piece usuly is charged positive (some plastic in my cheap friction experiments charge negative).Or one of polarity ("+" or "-") is recommended?
i think either + or – is better – forget which.
balloons and styrofoam work well though!
If turn some power wire turns (5…10) around camera – magnetic field bend particle tracks?
@Anonymousyes – magnets will bend some of the tracks.- but the effect is somewhat small. you may want to use are larger neodynium magnet
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