Characteristics of an "overload component" for low-Tc superconducting winding systems

Small Nb/Ti-Cu prototype superconducting coils have been wound using LBL-supplied wire, which has been normally applied to Rutherford cabled dipoles. The studies are being conducted in the context of planning versions of toroidal winding systems for an eventual conversion of the normal windings of an intermediate size system, such as the 1994 UCLA Tokamak, to superconducting coils. At this time initial data have been collected and-a novel quench inducing device (QID) has been tested. The magnet field intensities generated by the prototype magnet were measured and compared with the design values. Quench propagation has been investigated including stability behavior of the magnet. At low currents, a quenched domain close to the inner winding layer was found to be stationary, not propagating into the magnet during runs which did not encounter a severe quench.<
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