Cosmic Ray Detectors Built from Household Materials for Educational Purposes

Particle detectors like cloud chambers and spark chambers provide a direct and engaging way to visualize ionizing particles and cosmic rays, but the high cost, complexity, and perceived lack of reliability limits their use in education and outreach. This project aims to design and construct low-cost and accessible versions of both detectors for outreach and educational activities in experimental particle physics. We have therefore developed several different types of "household" cosmic ray detectors—including several types of cloud chambers and a spark chamber—using easily accessible low-cost materials. Validation tests have been performed to assess ease of use, and reliability, and we are presently assessing educational impact. Ultimately, this project seeks to lower barriers to experimental particle physics by providing open-source, hands-on tools for learners and educators.