Cooled superconducting magnetic system of complicated configuration for a thermonuclear facility

The results of investigation for developing partly stabilized superconducting magnetic systems (SMS) of complex configuration with indirect cooling at a stored energy of 1 MJ, and a current density of 1.6x104 A/cm2 are presented. The design features of SMS, which is a combination of two solenoids with helical and annular windings, are described in detail. The diagram of cryogenic cooling of SMS with the aid of helium is given. It is shown that in order to reduce thermal stresses in the winding during its polymerization, cooling and heating, the polymerization temperature should be reduced to 300-320 K. The time of transition of SNS to the normal state took less than 1s. It is shown that elimination of the emergency situations requires devices for fast (10sup(-3)-10sup(-4)s) dotection of the normal phase in the winding and a circuit for energy extraction in less than 1s