How Do You Measure Subatomic Particles in a Glacier?

A cubic kilometer of ice to measure sub atomic particles that are coming from many, many, many millions of light years away. How do you go about putting the censurs one thousand, 500 metrs, r whatever down into a glacier? Yes, there is actually a special drill that was built to build ice cube. And it works by heating up water and then a shooting it superfast and in a very controlled way, down glacier. So we basically sample this light as its being produced along the trajectory of these secondary particles. That's what our censors tell us. We can therefore sort of track back, instead of trace back, ok? Here there wasa her here there was