40 T CLASS HYBRID MAGNET SYSTEM

We have already completed the fabrication, installation, cabling, and the piping of a 40 T class hybrid magnet system including a 15 MW DC p ower supply (430 V x 35 kA), 15 MW water-cooling system (inlet tempera tures below 10 degrees C, flow rates up to 800 t/h) helium liquefier/r efrigerator, and a hybrid magnet composed of an outer superconducting magnet and an inner resistive magnet. Their test operations are progre ssing now. Except for the hybrid-mode test operations for the hybrid m agnet system we have nearly completed all the other test operations. I n this article we describe mainly the specifications of the hybrid mag net, the DC power supplies, total control system, water-cooling system , and the present situation of the test operation.