11. The detection is done via CCD or a photomultiplier tube . 12. The light then is detected and amplified by a photomultiplier tube ( PMT ). 13. After decommissioning, MACRO donated about 800 photomultiplier tubes to the Daya Bay Reactor Neutrino Experiment. 14. This photon is multiplied in a photomultiplier tube which converts light into an electrical signal. 15. Several hundred photomultiplier tubes , which are light sensors, cracked. 16. Surrounding the tank are 13, 000 photomultiplier tubes that detect the faintest flash of light. 17. A photomultiplier tube is placed on the top of the aluminum casing covering each scintillator. 18. Each array has 12 cylindrical counters equipped with a quartz radiator and a photomultiplier tube . 19. Some portion of these low-energy photons arrive at the photocathode of an attached photomultiplier tube . 20. In time resolved fluorometry the fast photomultiplier tube is the only practical single photon detector.