The RICH detector consists of 30 modules each with 8 windows. The detector is displayed unfolded in a flat plane even though it is to first order a cylinder. The active area of the windows is shown in yellow (or orange). The blue rectangles are hits and in the "3-D" view the height of the green line (one for each blue rectangle) is proportional to the pulse height.
Cherenkov image of a track striking
a plane LiF radiator.
Cherenkov image of a track striking
a sawtooth LiF radiator.