In particular, cosmic-ray muons are created continually in the upper atmosphere, and when they enter the detector they can produce enough Cerenkov light to illuminate every photomultiplier tube.

• 尤其是宇宙射线缈子在高层大气不停产生，如果它们进入侦测器，就可以产生足够的切仑科夫光来照亮每一根光电倍增管。