ISABELLE Superconducting Power Distribution System

A superconducting power distribution system has been designed which in addition to powering main magnet windings, will provide power for both individual and series connected magnet trim and correction windings. The proposed design utilizes two main and 42 trim superconducting leads arranged in two busses, which are routed through the magnets and their interconnectors. Since these leads must be maintained at cryogenic temperature, they are all located within the primary coolant system. The ISABELLE configuration, which is essentially a hexagon with rounded corners, can be divided into six essentially identical sextants. The portion of magnet lattice in the curved part of the sextant is called the regular bending section, while the magnet lattice in the straight areas at the end of the arcs is called the matching section. At the end of the matching regions are located lead pots, where superconducting leads penetrate the cryogenic environment and connect to normal conductors which span the experimental areas. In addition, at each of three locations within the curve, there is a provision for a twelve lead "minipot" penetration. Quality assurance associated with correctly connecting 40 leads at each of the many magnet interconnectors is not a trivial problem. A combination of positive lead identification, complete wiring instructions for each interconnection, visual inspections, individual magnetic testing and progressive system testing will be used to assure that proper connections are made.