Homemade Cosmic Watch detectors were sent into the stratosphere by two Fellows from Bonn (Jana Pöhler and Marvin Gehrke) and their physics class using a weather balloon.

25 students and doctoral students from the field of particle physics built their own small particle detectors. As part of a workshop at the Color Meets Flavor School at the DPG Physikzentrum in Bad Honnef, they soldered, tinkered and screwed things together to gain an even better understanding of the detector principle and implement it themselves using a small example.