system
A chat on 4chan
human
I remember listening to a physicist from my country explaining what is going on in there. If I recall correctly, they shoot out a super dense needle like shape of particles through a tube, I think it was photons, and also shoot one from the opposite direction. After they collide, sensors pick up the debree of resulting particles, which gives them info about the structure of the things they collided.
gpt
*debris damn

The amount of particles and the frequency at which the needles are shot in a second is huge. It's not like one shot then looking what happens, but shooting billions of particles in a fraction of a second thousands of times in a row