My Science Fair project was to see if we could see radiation with our eyes using a cloud chamber and PELTIR cooler. I am hoping to find tiny specks or dots on a black back drop to indicate that radiation is present

1. Building a functioning cloud chamber at home with no dry ice 2. Use materials such as 99% isoprophy alcohal\, felt and a Peltier cooler to make a biome or environment that is suitable for visible radiation 3. Saturate the chamber with the vapour from the alcohol and cool it using the Peltier cooler to create a supersaturated enviorment 4. Observe the streaks or dots that formed when the radiation passed

• Several short, thin streaks appeared, moving like a living animal
• The streaks appeared randomly throughout the experiment when the device was fully powered
• The rate of particles was low but constant
• The particles were mostlikely beta particles because of the location we turned the chamber in
• No clear alpha particles were visible possibly due to the location

This experiment successfully showed that a homemade cloud chamber can visually detect radiation. We can see the beta particles appearing in the chamber, and was mostly short and thin, like dots, almost, although we could not see the alpha particles, we can tell there is some form of radiation floating all around us. No clear alpha particles were appearing, most likely because of the environment or the radiation source. In therory if we were to addradiationion source like a welding rod, alpha particles could be seen. My hypothesis is proven right because we could tell that there is diffrent particles floating all around us.

• Intro to radioactive decay, which I watched before doing this project,t and helped me understand radiation

https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:radioactive-decay/v/intro-to-radioactive-decay

• to find the inspiration for the project(Cambridge Uni)

https://www.hep.phy.cam.ac.uk/scatter/cloud.html

• Curious scientist helped me make my cloud chamber

https://curiousscientist.tech/blog/diy-cloud-chamber-with-hv-grid?rq=cloud%20chamber

• I also used Amazon for my materials buying

I acknowledge my parents for supporting me and letting me compete in the 2026 science fair I acknowledge my science teacher Mr dyck for giving me suggestions on the project