Abstract: A high temperature superconducting (HTS) cable terminator including a first chamber having disposed therein a terminator block electrically connected to an HTS cable conductor received within the first chamber, a cryogenically sealed chamber, a cryogenically sealed chamber conductor electrically connected to the HTS cable conductor via the terminator block, where the cryogenically sealed chamber conductor has a first portion cryogenically sealed within the cryogenically sealed chamber and an end electrically connected to one or more electrical output conductors, and one or more refrigerant lines configured to feed gas refrigerant into the cryogenically sealed chamber, where the gas refrigerant configured to absorb heat from the cryogenically sealed chamber. Also included is a second chamber connected to the first chamber, the second chamber having disposed therein a heat exchanger thermally coupled to the one or more refrigerant lines and configured to extract heat from the gas refrigerant.

Abstract: A multi-stranded superconducting coil includes compensation windings for use in detection of quenches in the coil. The compensation windings are formed as an integral part of the coil by co-winding a non-superconducting strand along with the superconducting strands in the cable manufacturing process. The non-superconducting strand is cut and electrically connected to the coil at selected locations.

Abstract: A cryostat having inner and outer vessels, with a containment vessel disposed in the interior of the cryostat spaced from the inner vessel wall. The containment vessel houses a superconducting coil immersed in a liquid helium bath which is prevented from contacting the inner vessel wall. Primary and secondary shielding arrangements help to intercept heat transferred by gas conduction and radiation. For relatively high power operation wherein the coil is charged and discharged frequently, the inner and outer vessels are fabricated of a non-magnetic composite material.