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A three-dimensional, finite-element analysis of the Nb3Sn conductor joint design for the International Thermonuclear Experimental Reactor's central solenoid has been carried out. Specifically, a model of a twisted superconducting cable was derived using ANSYS to examine the impact of material and geometric parameters on the dc resistance and eddy current heating induced by transient magnetic fields.

The thermal performance of the toroidal field coil case for the Tokamak Physics Experiment was characterized using a finite element model. The latter characterized the coil case as a shell receiving thermal loads from neutrons and eddy current for heat flow and leakage simulations. The results confirmed the effectiveness of the cold structure's cooling system and ground wrap insulation in insulating the superconductor from 'heat deposited into the coil case' by nuclear and eddy currents.

The design of the first tokamak with a fully-superconducting poloidal field magnet system is reported. The project, otherwise known at the tokamak physics experiment, which is being continued at Princeton University's Plasma Physics Laboratory, will make use of cable-in-conduit superconductors made of Nb3Sn and NbTi wires to build the tokamak's 14 coils. It will also incorporate advanced quench detectors to counter noise and disturbances.

The magnet system for the Superconducting Super Collider (SSC) Gamma, Electrons and Muons (GEM) detector consists of a single layer, superconducting, split solenoid and two iron forward field shapers (FFS). In addition, major structura components, such as the central detector and FFS support structures and the vacuum vessels, are to be built with magnetic steel. This paper presents the nonlinear, two and three-dimensional electromagnetic analyses which are performed in support of the overall design effort. A detailed axisymmetric, finite element ANSYS model is used to determine the magnetic field distribution in the region of the detector, and the electromagnetic forces acting on the coi and various magnetic steel elements. A 3-D model is developed to capture the magnetic field perturbations produced by asymmetric, magnetic structural elements. The model produces 3-D field maps of the detector volume to evaluate the effects of these asymmetries on the detector resolution. Another 3-D model is used to determine the distribution of magnetic steel plates required to shield the nearby Electronic Rack Room from the coil's fringe field.

The TPX tokamak must protect 30 superconducting magnets during a complex, pulsed physics scenario. 2.0 MA plasma vertical disruptions will occur at unpredictable intervals. These should not cause quench, but will be difficult to distinguish from quench. A redundant, multiple signal protection system combines conventional voltage taps with signals from cowound conductors, pressure and flow sensors.

The Gammas, Electrons and Muons detector magnet is a key component of the Superconducting Super Collider accelerator. Its features include a solenoid coil made of aluminum-sheathed cable-in-conduit conductors for an operating current of 50 kA. Designed for on-site winding and assembly, it provides a magnetic field of 0.8 T and stores 2.5 GJ of energy. The magnet also employs a natural thermosiphon loop for cooling by thermal radiation.