I've been building a cloud chamber for the last 2 years on and off. It's finally reached maturity and now i'd like to share a video to explain how it's done.
This video shows some good tips and tricks in home made cloud chamber design. It mainly focuses on such details I would like to have known during the building process. Other information, such as how to build a water cooling system, is already available at many computer hardware sites.
The whole rig costs about 250-300 € not including the tools to build it. During these 2 years, I must have spent well over 800 € on it, trying out different solutions to problems along the way. In the end, this design is very simple, reliable, and easily replicable.
I also have an older video with the early construction process, some failed attempts and the first iteration of a working machine: Youtube link