Abstract
Forced flow cooled superconducting coil (FCC) has several advantages of large stability margin, high mechanical rigidity and good electrical insulation. Having these merits, FCC could provide efficient superconducting magnet systems for large machines, such as fusion devices.
Cable-in-conduit conductor (CICC) is regarded as one of the most attractive ones for FCC, because CICC has good heat transfer characteristics, which makes the magnet more stable against disturbances. There are some problems, however. One of them is that the coolant pressure will become very high during a quench, because its hydraulic diameter is relatively small. Besides, the propagation of normal zone has the close relation with the pressure rise. We must consider these characteristics to design and protect FCC.
This paper describes the results of the stability tests of FCC and the analyses of these characteristics, and also compares them with the results of numerical simulations.
