Liquid deuterium was chosen as the fuel for the fusion reaction because its use simplified the experiment from a physicist's point of view, and made the results easier to analyze. From an engineering point of view, its use necessitated the development of previously-unknown technologies to handle the difficult material, which had to be stored at extremely low temperatures, near absolute zero. A large cryogenics plant was built to produce liquid hydrogen (used for cooling the device) and deuterium (fuel for the test). A 3,000-kilowatt power plant was also constructed for the cryogenics facility.