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let me briefly introduce myself, I'm a highschool student from Indonesia, I'm currently making a cloud chamber for my science fair project, I did what the videos on youtube told me, but for some reason my cloud chamber won't work. Here are some pictures of my setup

So, I glued felt on top of my aquarium and soaked it with alcohol (95%), put about 4 kg of dry ice under my metal tray (baking tray) and I let the alcohol and dry ice do their job for about 15 minutes, it only showed some particles raining but I didn't see any tracks of muons. I used one bright flashlight ( about 8000 Lumens ) and the room was dark enough that I couldn't see my hand. I also covered the aquarium glass with black cloth to maximize the darkness. Can anyone help check what did i do wrong? ( and what kind of camera setup should I use to record the muons tracks? ) my cloud chamber setup

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closed as off-topic by Aaron Stevens, Kyle Kanos, Jon Custer, Dvij Mankad, GiorgioP May 15 at 9:30

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  • "This question appears to be about engineering, which is the application of scientific knowledge to construct a solution to solve a specific problem. As such, it is off topic for this site, which deals with the science, whether theoretical or experimental, of how the natural world works. For more information, see this meta post." – Aaron Stevens, Kyle Kanos, Dvij Mankad
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The type of light one uses seems to make a difference. When using a linear LED source, I saw nothing (not even the "snow"). Then I switched to an old-style (filament bulb) flashlight, I saw the "snow" AND a few tracks. Using a point-source LED (3rd attempt) saw nothing (again). All other parameters (chamber, temperature, source) were the same. When I changed back to the filament bulb, I saw the "snow" and a nice long track.

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