The light generated by the scintillator is collected in photomultiplier tubes. This image shows the structural members which support and align the eight superconducting coils. The structures are all aluminum and are designed to allow a single coil to be postioned while the rest are locked in place. The aluminum coil cases have been made transparent to view the superconducting cable inside. This image and the following one were created to visualize the complex flow circuits between the eight superconducting magnets.
Liquid helium is supplied by the cryo-reservoir atop the vessel.
The bottom four magnet coils are fed the liquid helium first by the supply manifold. The lower four coils are each connected to an upper coil to make four parallel thermosiphon loops. Color coded coils show thermosiphon loops, 79K Coils of the same color are connected in series between the supply and return liquid helium manifolds. Four colors indicates four parallel paths. The inner most loop is the path that the superconducting power lead follows and is cooled by its own liquid helium circuit.