What is the specific particle detector technology used at CERN or similar Institutions. Is it essentially a big digital camera? When said particles are detected, how are they segregated, How does this physically happen? I imagine may be it is by energy, but how exactly is this achieved, are certain voltages measured, thus requiring some reverse engineering to know the associated energies? Is the improvement in detection a computational or material science problem? I would love to know the technical details if possible.