Soon to scintillate

These are just some of the 362,000 highly reflective plastic PVC tubes that will become part of NOvA’s two detectors. Each of the cells will be filled with liquid scintillator. When a neutrino strikes an atom in the liquid scintillator, it will release a burst of photons. Photodetectors will sense the resulting pattern of lighted tubes. Scientists can then determine the kind of neutrino that caused the interaction. Each cell measures 3.9 cm wide, 6.0 cm deep and 15.5 m long. Photo: Reidar Hahn