Abstract: A superconducting electric motor includes: a rotor that is rotatably arranged; and a stator that is arranged in a radial direction of the rotor so as to face the rotor. The stator has a plurality of superconducting coils that are wound at a radial end portion of a stator core and that are formed of a superconducting wire material. The superconducting electric motor includes a refrigerator that has at least one narrow tube that flows low-temperature refrigerant inside. The at least one narrow tube is in thermal contact with the stator core and at least one of the coils.

Abstract: An improved power transfer mechanism is disclosed, which is particularly beneficial in power transmission applications. The mechanism allows the SCFCL system to have more than one electrical reference. The use of hydraulic power simplifies the design of systems in which one part of the system is referenced to ground, while a second part of the system is referenced to a different voltage, typically much higher than ground. For example, the tank of the SCFCL system may not be connected to ground, while hydraulic power supply is referenced to ground. This embodiment is performed without the use of an electrically conductive path between the two parts of the system.

Abstract: A superconducting magnet coil support with cooling and a method for coil cooling are provided. One superconducting coil support arrangement includes a superconducting coil and at least one support beam supporting the superconducting coil and defining a tank for storing a cooling fluid therein. The superconducting coil support arrangement further includes a plurality of cooling tubes coupled to the superconducting coil and connected to the at least one support beam, wherein the plurality of cooling tubes are configured to transfer the cooling fluid therethrough.

Abstract: A superconducting magnet includes at least one superconducting coil and a quench protection circuit electrically coupled to said at least one coil in parallel. The circuit includes at least one quench heater assembly thermally coupled to the at least one coil, and at least one superconducting current limiter electrically connected in series with the at least one quench heater assembly. The superconducting current limiter has a superconducting state with zero resistance, and a normal state with a normal resistance to decrease an electric current flowing through the quench heater assembly.

Abstract: An alternating current (AC) generator and method of operating the generator are provided. The generator includes a pair of two opposing cylinders. Each cylinder includes a high-temperature superconductor material at a temperature. The superconductor material is in a superconducting state in the presence of an external magnetic field below a critical field strength, wherein the critical field strength is a function of the temperature of the superconductor material. A sum of a non-zero time-invariant magnetic field strength and a time-varying magnetic field strength cycles between at least a first field strength below the critical field strength for the superconductor material at the temperature and at least a second field strength above the critical field strength for the superconductor material at the temperature, such that the superconductor material cycles between a superconducting state and a non-superconducting state. The generator further includes a piston configured to move within the two cylinders.

Abstract: A coil comprises a set of windings with a generally annular shape and formed by a plurality of series-connected partial windings made of a superconductor with a high critical temperature, in which these partial windings are arranged next to each other in stratified form, and at least one cooling sheet which is made of thermally conductive material and arranged in contact with this set of windings and which is designed to be connected in a thermally conductive manner to a cryogenic cooling system.

Abstract: In a superconducting magnet assembly a plurality of superconducting coils, joined in series, are housed within a cryostat. A coil node between two electrically adjacent of the superconducting coils provides an input voltage. A coil node voltage output is provided comprising a series resistor connected between the coil node and a further node. A non-linear element is connected between the further node and a ground voltage, and an output connector is electrically connected to the further node and traverses a boundary of the cryostat.

Abstract: A superconductive electrical cable is provided, which comprises a conductor consisting of superconductive wires. The conductor (L) is designed as a stranded conductor in which the wires (1) are stranded together with a predetermined pitch length (S) lying between about 5×D and about 20×D, where D is the diameter of the stranded conductor.

Abstract: A motor and method of operation are provided. The motor includes a plurality of cylinders, wherein at least two of the cylinders are positioned at a non-zero angle relative to one another. Each cylinder includes a piston configured to move within the cylinder and a high-temperature superconductor material in a superconducting state in the presence of an external magnetic field below a critical field strength, wherein the critical field strength is a function of the temperature of the superconductor material. Each cylinder further includes a permanent magnet mechanically coupled to the piston and configured to move within the cylinder and to have a magnetic field that interacts with the superconductor material.

Abstract: A motor and a method of operating the motor are provided. The motor includes a plurality of cylinders. Each cylinder includes a piston configured to move within the cylinder. Each cylinder further includes a high-temperature superconductor material at a temperature. The superconductor material is in a superconducting state in the presence of an external magnetic field below a critical field strength, wherein the critical field strength is a function of the temperature of the superconductor material. Each cylinder further includes a permanent magnet mechanically coupled to the piston and configured to move within the cylinder and to have a magnetic field that interacts with the superconductor material.

Abstract: A wireless energy transfer system includes a primary and one (or more) secondary oscillators for transferring energy therebetween when resonating at the same frequency. The long range (up to and beyond 100 m) efficient (as high as and above 50%) energy transfer is achieved due to minimizing (or eliminating) losses in the system. Superconducting materials are used for all current carrying elements, dielectrics are either avoided altogether, or those are used with a low dissipation factor, and the system is operated at reduced frequencies (below 1 MHz). The oscillators are contoured as a compact flat coil formed from a superconducting wire material. The energy wavelengths exceed the coils diameter by several orders of magnitude. The reduction in radiative losses is enhanced by adding external dielectric-less electrical capacitance to each oscillator coil to reduce the operating frequency.

Abstract: A motor and a method of operating the motor are provided. The motor includes a stator including a high-temperature superconductor material at a temperature. The superconductor material is in a superconducting state in the presence of an external magnetic field below a critical field strength, wherein the critical field strength is a function of the temperature of the superconductor material. The motor further includes a rotor including a plurality of permanent magnets and configured to rotate about an axis, wherein each magnet of the plurality of permanent magnets has a magnetic field that interacts with the superconductor material.

Abstract: An apparatus for melting down metal pieces and/or metal powders in a heat-resistant crucible which is enclosed by at least one coil arrangement generating a DC magnetic field predominantly penetrating the crucible transversely to its central axis and inducing short-circuit currents during rotation of the crucible around its central axis. The coil arrangement comprises at least one superconducting winding in a cryostat and a lowerable stamp rotates in the same direction as the crucible.

Abstract: A superconductive electrical direct current cable with at least two conductors insulated relative to each other is indicated, where the cable is placed with at least two conductors insulated relative to each other, where the conductors are arranged in a cryostat suitable for guidance of the cooling agent, wherein the cryostat is composed of at least one metal pipe which is surrounded by a circumferentially closed layer with thermally insulating properties. In the cryostat is arranged a d-shaped carrier composed of insulating material, where the carrier has at least two diametrically oppositely located outwardly open grooves in each of which is arranged one of the conductors. Each conductor is composed of a plurality of superconductive elements.

Abstract: An ion therapy system comprises a particle accelerator (1) mounted on a rotatable gantry (2). The particle accelerator includes a superconducting coil (17) which rotates about its axis as the particle accelerator rotates about the gantry axis in use to direct an output beam towards a target from different directions. The particle accelerator is rotatable through (180) degrees to move the beam through a corresponding arc. The particle accelerator includes cooling system arranged to cool the coil as the coil rotates. The superconducting coil (17) is mounted in a coil support (25). The coil is surrounded by a cryogen chamber (32) which is located radially outwardly from the coil (17) on the other side of the support (25). The cryogen chamber is in fluid communication with a cryogen recondensing unit (29) whereby vaporized cryogen may flow from the cryogen chamber (32) to the cryogen recondensing unit (29) to be recondensed in use before returning to the cryogen chamber.

Abstract: A new class of superconducting compositions, and methods for making and using them are described. These compositions exhibit superconductivity at temperatures in excess of 26° K. and are comprised of transition metal oxides having at least one additional element therein which may create a multi-valent state of the transition metal oxide. The composition can be a ceramic-like material having a layer-like crystalline structure, where the structure is distorted having either an oxygen excess or deficiency. An example is RE-AE-TM-O, where RE is a rare earth or rare earth-like element, AE is an alkaline earth element, TM is a transition metal element (such as Cu) and O is oxygen.

Abstract: A transmission system is provided with a superconductive cable having three phase conductors and a cryostat, surrounding the phase conductors, and encasing a hollow space, for conducting a cooling agent. For the three phase conductors, a common neutral conductor is provided, being made of electrically normally conducting material, carried out as insulating round conductor and placed outside the cryostat and next to it. The cryostat is made of a circumferentially enclosed, thermally insulated sheath.

Abstract: An arrangement for an electrically conducting connection of a superconductive electric cable (1) with a cable having normal conductivity at room temperature is provided, which includes a passage (D) with an electric conductor (5) surrounded by a thermal insulation (6). The conductor (1) of the superconductive cable (1) is connected to an end of the conductor (5) of the passage (D), at whose other end a cable having normal conductivity can be connected. On the end of the superconductive cable (1) intended to connect to the conductor (5) of the passage (D) electrode (4) is mounted serving the electric field control. At least in the area of the electrode (4) a cryostat is present which surrounds it, which is constructed as a circumferentially closed sheath of electrically insulating material with a vacuum free, thermal insulation. The end of the sheath facing the passage (D) is placed during the state of operation of the arrangement at high voltage potential, while the other end is connected to ground potential.

Abstract: A high temperature superconductor (HTS) transmission line for transporting electricity includes a plurality of HTS wires coupled to receive and transport electricity. A cooling system is thermally coupled to the plurality of HTS wires and includes a plurality of joint coaxial cooling arrangements each including a thermoelectric (TE) cooler radially outside a inner liquid nitrogen (LN2) cooler. The TE coolers are powered by electricity flowing along the plurality of HTS wires. The TE cooler cools the outer portion of the joint coaxial cooling arrangement to an intermediate temperature that is above a target controlled temperature, and the LN2 cooler cools from the intermediate temperature to a temperature at or below the target controlled temperature. A system for generating and transporting nuclear power includes a nuclear power plant including a turbine for generating electricity, and a HTS transmission line cooled by a plurality of joint coaxial cooling arrangements for transporting the electricity.

Abstract: A coil comprises a set of windings with a generally annular shape and formed by a plurality of series-connected partial windings made of a superconductor with a high critical temperature, in which these partial windings are arranged next to each other in stratified form, and at least one cooling sheet which is made of thermally conductive material and arranged in contact with this set of windings and which is designed to be connected in a thermally conductive manner to a cryogenic cooling system.

Abstract: A parallel conductor comprising a bundle of a plurality of high temperature superconducting wire materials, ends of the wire materials being electrically connected to each other, wherein each of the high temperature wire materials has at least one short-circuited portion where the wire materials are connected by means of a non-superconducting conductive material, and portions other than the short-circuited portion being covered with an insulating material.

Abstract: The present invention relates to a superconducting power transforming apparatus. The superconducting power transforming apparatus according to the present invention comprises a transformer housing having a transforming cable passing hole and filled with a liquid cooling means; a superconducting transformer housed in the transformer housing in a state that the superconducting transformer is immersed in the liquid cooling means; a tap changer housing having a tap changing cable passing hole and vacuum-sealed from outside; a power tap changer housed in the vacuum tap changer housing; and a cable linking pipe vacuum-sealed from the transformer housing and the tap changer housing, and linking the transforming cable passing hole with the tap changing passing hole in order that a transformer winding tap cable connecting the superconducting transformer and the power tap changer passes through.

Abstract: Provided is a superconducting cable configured to improve superconductivity by increasing reflectivity of cryostats and enhancing cooling performance. The superconducting cable includes: a core provided with a conductor; and a cryostat surrounding a periphery of the core. A material of the cryostat is aluminum or an aluminum alloy and a surface roughness of the cryostat is 30 microns or less in terms of RMS value.

Abstract: The present disclosure generally relates to a superconducting power grid having one or more AC/DC converters. The superconducting grid may further include one or more pairs of superconducting DC cables connecting each AC/DC converter. Each pair of superconducting DC cables may include a first positive polarity cable and a first negative polarity cable. The grid may also include at least one switching device configured to operatively connect at least one of the first and second AC/DC converters with at least one of the pairs of superconducting DC cables, the switching device further configured to adjust the polarity of at least one of the polarity cables. Other embodiments and implementations are also within the scope of the present disclosure.

Abstract: A superconducting cable system in which at least one superconducting electrical cable is arranged in a cryostat which consists of two metallic tubes, which are arranged concentrically and at a distance from one another. Vacuum insulation is fitted in the circumferential gap formed by the distance between the tubes, which vacuum insulation consists of spaces composed of a material having low thermal conductivity and plastic films coated with a metal and having high reflectivity. The gap is evacuated. In addition, thermally insulating material (9) is arranged in the gap, and its thermally insulating characteristics are independent of the vacuum which is produced between the two tubes (5, 6).

Abstract: A cryogenic system includes a superconducting magnet (20) in a reservoir of liquid helium (LH). Helium vapor (VH) rises and contacts a recondenser surface (50, 50?, 50?) on which the helium vapor (VH) condenses into liquid helium and flows by gravity off a lower edge of the recondenser surface. A plurality of fins (52) extend from the recondenser surface or a plurality of grooves (52?, 52?) are cut into the recondenser surface to disrupt the film thickness and to provide a path by which droplets of the liquid helium leave the recondenser surface without travelling a full vertical length of the recondenser (30).

Abstract: A displacer for adjusting a level of a liquid cryogen in a cryostat. The displacer including an expandable member at least partially defining a sealed chamber. The expandable member being configured to transition from a collapsed state where the sealed chamber has a smaller volume to an expanded state where the sealed chamber has a larger volume. The displacer includes a first end piece attached to a first end of the expandable member and a second end piece attached to a second end of the expandable member.

Abstract: A superconduction apparatus includes: a superconductor; a first vacuum vessel configured to accommodate said superconductor; a cooling unit which comprises a cold head configured to generate a temperature at which the superconductor is set to a superconduction state; and a second vacuum vessel configured to accommodate the cooling unit. The head and the superconductor are connected through a first connection hole which communicates the first vacuum vessel and the second vacuum vessel.

Abstract: A superconductive synchronous machine having superconductive magnetic bearings. A superconductor (6) on the stator side as a first bearing part is disposed opposite from a second bearing part (12) on the rotor side, the second being part being magnetically and mechanically connected via a flux feed section (11) to the pole core (9) of the rotor. A superconductive exciting coil (10) in the rotor pole core (9) excites both the pole core (9) and the second bearing part (12). In order to cool the superconductive exciting coil (10), coolant feeds (16, 16?, 24, 25) are provided, which are sealed in relation to the rotor shaft (8, 8?) by ferrofluid seals (26). The power for the exciting coil is fed via slip rings (21) or by being inductively connected (29) at the rotor shaft (8?).

Abstract: A system is specified having at least one superconducting cable (SK) which has at least one superconducting conductor (2), and having a cryostat (KR) which surrounds the same and has two metallic tubes, an inner tube (6) and an outer tube (7), which are arranged concentrically at a distance from one another, are corrugated transversely with respect to their longitudinal direction and between which vacuum insulation (8) is arranged. The cable (SK) has a central tubular support (1) for passing a coolant through, on which the superconducting conductor (2) rests. The cable (SK) is surrounded all around by a buffer layer (5) which protects the same against mechanical damage and consists of insulating material, and the inner tube (6) of the cryostat (KR) at least rests in a sealed manner on the buffer layer (5).

Abstract: A superconducting magnet structure has a thermally conductive former with a former body having a former surface and a channel in said former surface that is open at said former surface, a thermally conductive tube disposed in the channel and configured to receive a circulating coolant therethrough, and the former body has at least one deformable retaining element integrally formed as a part of said former body and projecting from said surface of the former body next to the channel and being deformed over said tube in the channel to cover the tube in said channel and retain the tube in the channel.

Abstract: An energy system, in at least one embodiment, includes an energy production device for production of energy for the energy system with the aid of an working medium, a superconductor for low-loss conduction of electrical energy in the energy system, and a cooling device for cooling of the superconductor with the aid of a liquid phase of a cooling medium. The liquid phase of the cooling medium is, according to at least one embodiment of the invention, produced in the cooling device by condensation of a gaseous phase of the cooling medium, with the condensation of the gaseous phase of the cooling medium taking place by heat transfer from the gaseous phase of the cooling medium to the working medium. The overall efficiency of the energy system can improved by the heat transfer step.

Abstract: A superconducting magnet device for a single crystal pulling apparatus is arranged outside a pulling furnace containing a crucible for melting a single crystal material therein so as to apply a magnetic field to the melted single crystal material. The superconducting magnet device for a single crystal pulling apparatus includes a cryostat containing a superconducting coil therein, and a refrigerator port arranged on the outer circumferential surface of the cryostat and provided with a cryogenic refrigerator that cools the superconducting coil. The cryogenic refrigerator is provided in a region of the outer surface region of the cryostat at which the intensity of the magnetic field generated by the superconducting coil is weak.

Abstract: A terminal apparatus for a superconducting cable system connects an overhead transmission cable or power appliance such as a breaker in an ambient temperature state to a superconducting cable through which power is transmitted at a cryogenic temperature. The terminal apparatus has: a refrigerant tub which is connected to the end of a superconducting cable and is filled with a refrigerant; a vacuum heat insulating container that surrounds the exterior of the refrigerant tub; a current lead having one end connected to the end portion of the superconducting cable and the other end connected to the overhead transmission cable or power appliance through the refrigerant tub and the vacuum heat insulating container; and a superconducting fault current limiter installed at a center portion of the current lead in the interior of the refrigerant tub to limit fault current.

Abstract: A superconducting magnet system comprises an annular cryogenic vessel (1) having an outer vacuum container (2) and containing a superconducting magnet (3) within an annular reservoir (4) containing liquid helium. A cryocooler (5) has a first stage (7) linked by a thermal link (9) to a thermal shield (6) within the vacuum space surrounding the reservoir (4) and a second stage (8) that serves to recondense evaporating helium gas from the reservoir (4). In the absence of special measures, such a cryocooled shield (6) would warm up quickly in the event of a power failure and would radiate heat onto the reservoir (4) causing all of the liquid helium to evaporate. However an inertial shield (11) is provided between the reservoir (4) and the thermal shield (6) in such a position that the outgoing helium gas from the reservoir (4) carries away the heat being transferred to the inertial shield (11) from the thermal shield (6) and thus slows down the rate at which the thermal inertial shield (11) warms up.

Abstract: A superconducting device comprises a vacuum chamber and means to evacuate the vacuum chamber. A base plate is provided within the vacuum chamber and first, second and third cylindrical walls extend from the base plate. The second and third cylindrical walls are arranged coaxial with the first cylindrical wall. A first chamber is defined between the first cylindrical wall and the second cylindrical wall, a second chamber is defined between the second cylindrical wall and the third cylindrical wall and a third chamber is defined within the third cylindrical wall. A superconducting wire is arranged within the second chamber and a cryogenic insulating material is arranged within the second chamber to encapsulate the superconducting wire. A material having a high specific heat capacity is arranged within the first chamber and there are means to cool the base plate.

Abstract: A superconducting magnet system with a superconducting magnet coil system, which is disposed in a cryogenic fluid tank (2) of a cryostat (1), and an exchangeable refrigerator (5; 31) which is operated in a vacuum container (8) and is provided to re-liquefy the cryogenic fluid flowing through a tubular conduit (4; 21) is characterized in that the tubular conduit (4; 21) is rigidly installed in the cryostat (1). The refrigerator reaches its optimum performance during operation in a vacuum, and can be easily exchanged in case of a defect.

Abstract: An arrangement of a two-phase superconducting cable as a power supply cable in two-phase power distribution networks for electric railways include two phase conductors which are arranged coaxially with respect to one another and are separated from one another by an inner dielectric. A cryostat, with the superconducting cable arranged therein, has two tubes which run co-axially and at a distance from one another with vacuum insulation between them, where in addition to the superconducting cable, the cryostat surrounds a free space for a coolant to be passed through, and where an outer dielectric is fitted over the outer phase conductor of the superconducting cable.

Abstract: An arrangement is provided having a superconductive cable (SK) which consists of a superconductive conductor (1) and a superconductive screen (3) that encloses the latter with the interposition of a dielectric (2) and which is enclosed, with the inclusion of a free space (FR) for conveying a refrigerant, by a cryostat (KR) which consists of two metal tubes (4,5) arranged mutually concentrically, between which vacuum insulation (6) is arranged. Outside the screen (3), a tubularly closed layer (7, 8) of a ferromagnetic material is provided over the entire length of the cable (SK). It is preferably arranged on the outer circumference of the cryostat (KR).

Abstract: A magnet system, in particular for a magnetic resonance examination system, comprises a superconductive main magnet having a near group of coil windings and a remote group of coil windings. A gradient coil system forms a source of power dissipation into at least part of the coil windings. The near group of coil windings and the remote group of coil windings are near and remote from the source of power dissipation, respectively A cooling system has a high-temperature cooling station and a low-temperature cooling station. The high-temperature cooling station cools mainly the near group of coil windings. The low temperature cooling station cools mainly the remote group of coil windings. The near and remote group optionally are made of different superconductive materials. Thus, additional degrees of freedom are achieved which allow less expensive magnet design.

Abstract: A superconducting magnet assembly and method of cooling a superconducting magnet assembly.

Abstract: The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system.

Abstract: A magnetic field generator comprises a superconducting bulk body, which generates a superconducting magnetic field, a refrigerant vessel for storing solid nitrogen, a vacuum container, which accommodates therein the superconducting bulk body and the refrigerant vessel, and a refrigerator having a cooling head for cooling the refrigerant vessel. The superconducting bulk body is arranged along a wall of the vacuum container. The cooling head of the refrigerator and the refrigerant vessel are in thermal contact with each other. The refrigerant vessel and the superconducting bulk body are in thermal contact with each other.

Abstract: An arrangement is specified for current limiting having a superconducting cable (SK) which is arranged in a cryostat (KR) which has an outer wall which comprises two metallic tubes (1, 2) which are arranged concentrically with respect to one another and between which vacuum insulation (3) is incorporated. The cryostat (KR) surrounds a free space (FR) for a coolant to pass through, in which free space (FR) the superconducting cable (SK) is arranged. It also has an inner wall (IW) which surrounds a cylindrical cavity (HR) and likewise comprises two metallic tubes (4, 5) which are arranged concentrically with respect to one another, between which vacuum insulation (6) is incorporated, and which is located within the outer wall (AW) and is separated therefrom by the free space (FR). The superconducting cable (SK) which has a superconducting conductor, a dielectric surrounding the same and a superconducting screen which is arranged above the same, is wound in a helical shape around the inner wall (IW).

Abstract: An arrangement is specified having a superconducting cable (SK) which comprises a superconducting conductor (1) and a superconducting screen (3) which concentrically surrounds the same with the interposition of a dielectric (2). The cable (SK) is surrounded by a cryostat (KR) enclosing a free space (FR) for a coolant to be passed through, which cryostat (KR) which cryostat comprises two metallic tubes (4, 5) which are arranged concentrically with respect to one another and between which vacuum insulation is arranged. The screen (3) is composed of a superconducting material whose electrical resistance value in the normally conductive state is greater by a factor of at least 50 than the electrical resistance value of the material used for the conductor (1) in the normally conductive state.

Abstract: A terminal structure of a superconducting cable is provided that is capable of preventing degradation in airtightness of a seal provided on the boundary between a room-temperature side and a cryogenic side for a long-term use. The terminal structure includes a terminal of a superconducting cable, a bushing providing electrical conduction with a superconducting conductor of the cable, and a refrigerant bath housing the terminal and the bushing. The refrigerant bath includes a liquid nitrogen layer in its cryogenic side and a nitrogen gas layer in its room-temperature side that are adjacent to each other. In the nitrogen gas layer, distance t between an inner surface of the refrigerant bath and an outer periphery of the bushing is dimensioned such that nitrogen gas is kept in a gaseous state without being pressurized by a pressurizer and respective pressures of nitrogen gas and liquid nitrogen counterbalance each other.

Abstract: A superconductor cooling system has: a first superconductor; a first cooling conductor used for cooling the first superconductor; a first cooling unit configured to cool the first cooling conductor to a first temperature; and a current lead configured to supply a current to the first superconductor. Here, a part of a path of the current is formed of a second superconductor. The superconductor cooling system further has: a second cooling conductor used for cooling the second superconductor; a second cooling unit configured to cool the second cooling conductor to a second temperature; and a first thermal conduction switch connected between the first cooling conductor and the second cooling conductor to ON and OFF heat transfer between the first cooling conductor and the second cooling conductor.

Abstract: Superconductor cable having a plurality of flat, tape-shaped ribbon superconductor wires assembled to form a stack having a rectangular cross section, the stack having a twist about a longitudinal axis of the stack. Multiple superconductor cables including twisted stacked-cables of the flat-tape-shaped superconductor wires, and power cable comprising the twisted flat-tape stacked cables are disclosed. Superconducting power cable disposed within and separated from an electrical insulator with a space passing cryo-coolant between the superconducting cable and insulator is also disclosed.

Abstract: A high temperature superconducting (HTS) magnet coil disposed within a cryostat is configured with a thermo-siphon cooling system containing a liquid cryogen. The cooling system is configured to indirectly conduction cool the HTS magnet coil by nucleate boiling of the liquid cryogen that is circulated by the thermo-siphon in a cooling tube attached to a heat exchanger bonded to the outside surface of the HTS magnet coil. A supply dewar is configured with a re-condenser cryocooler coldhead to recondense boiloff vapors generated during the nucleate boiling process.

Abstract: A cooling system includes a first section of high temperature superconducting (HTS) cable configured to receive a first flow of coolant and to permit the first flow of coolant to flow therethrough. The system may further include a second section of high temperature superconducting (HTS) cable configured to receive a second flow of coolant and to permit the second flow of coolant to flow therethrough. The system may further include a cable joint configured to couple the first section of HTS cable and the second section of HTS cable. The cable joint may be in fluid communication with at least one refrigeration module and may include at least one conduit configured to permit a third flow of coolant between said cable joint and said at least one refrigeration module through a coolant line separate from said first and second sections of HTS cable. Other embodiments and implementations are also within the scope of the present disclosure.