Detects high-energy particles passing through a supersaturated vapor,each particle ionizes molecules along its path and small droplets condense on them to produce a visible track.

• 观察高能粒子穿过饱和蒸汽，每个粒子沿着自己的路径电离分子浓缩在其上的小滴能产生一个明显的轨迹。