Cooling and Excitation Tests of a Thin 1 mφ×1 m Superconducting Solenoid Magnet

Abstract

Cooling and excitation tests of a thin 1 mφ×1 m superconducting solenoid magnet were performed. Quench properties were measured after inducing quenches with a heater. The magnet has a single layer aluminum-stabilized NbTi/Cu superconductor of 269 turns and the forced flow cooling method of two-phase helium was used. The design excitation current of the magnet is 4.5 kA to give a uniform field of 1.5 T with the iron yoke. The magnet was excited up to 6 kA without any unforced quench in the second test in which the iron yoke was absent.