Abstract: A liquid neon (LNe) thermosiphon system for cooling a high-temperature superconducting (HTS) magnet is disclosed. The system may include a phase separator vacuum vessel enclosing a cryocooler, a heat exchanger, and a phase separator configured to condense circulating neon gas into liquid phase. A thermosiphon circuit comprising a LNe supply line, return line, and one or more coil cooling lines circulates the liquid neon to and from the HTS coil and associated magnet current leads. The circulation is driven passively by the thermal load of the HTS magnet, enabling heat to be removed without mechanical pumps. The coil is housed within a vacuum-insulated coil vessel to minimize thermal losses. The vertical orientation of the HTS coil allows gravitational assistance in the return flow of cryogen, optimizing system performance. This compact and pressure-tolerant design facilitates integration in superconducting systems implementing efficient and stable cryogenic cooling.

Abstract: A stress-strain test for conductors. A test assembly receives first and second conductive layers and a dielectric layer adjacent each of the conductive layers. The layers are generally ring-shaped and concentric when received by the test assembly and the dielectric layer separates the conductive layers from each other. A magnetic field source provides a magnetic field to the test assembly and a variable current source provides current to the second conductive layer. A circuit measures a change in capacitance between the conductive layers when the current in the second conductive layer is varied whereby the stress and strain characteristics of the second conductive layer are determined as a function of the capacitance change.