Superconducting fast cycling magnets of the Nuclotron

The new superconducting heavy ion synchrotron-Nuclotron was put into operation at the Laboratory of High Energies. The maximum design energy is 6 GeV/u. There are 160 pulsed SC magnets with a "cold" iron yoke and a hollow superconductor winding in the ring. A magnetic field of 2 T is provided under a supply current of 6 kA. The magnets were tested under a cycle dB/dt=4 T/s, B=2 T, and a ramp rate f=1.0 Hz. A two-phase helium flow was chosen as a coolant. The Nuclotron "cold" mass is about 80 tons. The cryogenic supply system capacity is 4.8 kW at 4.5 K. The total running time of the Nuclotron reached 1100 hours after the last run in March 1994.<
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