Abstract: A conductor arrangement for a resistive switching element, has at least first and second conductor connections disposed in a mutual plane adjacent to each other and insulated against each other. The composite conductors each have two conductor parts extending parallel, and forming a bifilar construction. The conductor parts are constructed from at least one superconducting conductor band. The composite conductors are formed into a coil winding, wherein the windings thereof substantially extend in the manner of a spiral, and are insulated against each other by a spacer.

Abstract: The invention offers a superconducting coil that has the shape of a pancake formed by winding a superconducting conductor. The superconducting conductor is composed of a tape-shaped (Bi, Pb)2223-based superconducting wire and a tape-shaped thin-film RE123-based superconducting wire that are electrically connected in parallel with each other. The coil generates only a low voltage in the steady-operation state, limits the generated voltage to a low level even in a state where an external disturbance enters for some reason, and is therefore less susceptible to quenching. Consequently, the coil can be operated stably in both states. The invention also offers a superconducting conductor to be used to form the coil.

Abstract: The method of winding superconducting wire comprises a winding method comprising: winding the superconducting wire from the source reel onto the first lane of the first bobbin a first number of times in a first direction; fixing the first bobbin and the second bobbin to each other; winding the superconducting wire from the source reel onto the third lane of the second bobbin a second number of times in the first direction; separating the first bobbin and the second bobbin from each other; and winding the superconducting wire from the first lane of the first bobbin onto the fourth lane of the second bobbin a third number of times in a second direction which is different from the first direction while winding the superconducting wire from the third lane of the second bobbin onto the source reel the third number of times in the second direction.

Abstract: The superconducting winding (2) is configured such that it has a band-shaped HTS conductor (4) of the Röbel-conductor type, made of band-shaped HTS individual conductors that are transposed among each other. An armoring band (5) is to be wound to the prefabricated HTS conductor (4), the band not being metallurgically connected to the HTS conductor (4) and being subject to a comparatively larger winding tension (WZ2). The armoring band (5) is wound at a winding tension (WZ2) that is at least 1.5 times, preferably at least 3 times as large as the winding tension (WZ1) of the HTS conductor (4).

Abstract: A low-cost superconducting coil which can generate a high magnetic field at comparatively high temperature is provided. The superconducting coil is formed in a pancake shape by winding a superconducting conductor that is made by electrically connecting a tape-shaped (Bi,Pb)2223 superconducting wire and a tape-shaped RE123 superconducting wire in series such that the tape-shaped (Bi,Pb)2223 superconducting wire is arranged in the outer circumferential part and the tape-shaped RE123 superconducting wire is arranged in the internal circumferential part.

Abstract: Disclosed are a superconductive magnet manufactured by winding a thin superconductive rod wire in a coil without joint for maintaining a persistent current mode, and a method for manufacturing the same. The method includes winding both ends of a superconductive rod wire (10) on a first bobbin (21) and a second bobbin (22) respectively; forming a first unit rod wire (10a) and a second unit rod wire (10b) by slitting the superconductive rod wire (10) in the lengthwise direction; producing a pancake coil by winding the first and second unit rod wires (10a, 10b) on third bobbins (25) in one direction; and arranging the first and second unit rod wires (10a, 10b) such that magnetic fields (B, B?) in the same direction are generated from the pancake coil, by reversing one of the third bobbins (25) on which the first and second unit rod wires (10a, 10b) are wound.

Abstract: High-current, compact, flexible conductors containing high temperature superconducting (HTS) tapes and methods for making the same are described. The HTS tapes are arranged into a stack, a plurality of stacks are arranged to form a superstructure, and the superstructure is twisted about the cable axis to obtain a HTS cable. The HTS cables of the invention can be utilized in numerous applications such as cables employed to generate magnetic fields for degaussing and high current electric power transmission or distribution applications.

Abstract: The conductive path of the current-limiting device is made of a strip-shaped super conductor, whereby the structure thereof has a metallic strip, at least one oxidic buffer, a type AB2Cu3Ox super conductive layer and a metal cover layer which is arranged thereon. An intrinsically stable bifilar coil is embodied with said super conductor, and a distance is maintained between adjacent coil windings, wherein a distance maintainer is arranged which is transparent to the coolant.

Abstract: A superconductive cable is provided which upon normal state, restricts flowing of electric current to a former to the maximum extent to thereby keep a cryogenic state in the superconductive cable stable. The superconductive cable includes a former surrounded by a superconductive layer and a cryostat provided at the outside of the superconductive layer, wherein the former includes a metal wire-wound part around which a plurality of wires is wound and an eddy-current prevention layer provided on the outer face of the wire-wound part, and the metal wires and the eddy-current prevention layer are made of a copper alloy.

Abstract: A superconducting magnetic field coil (1; 21; 31; 41; 51; 61) comprising at least one coil section (42; 43) which is wound in layers, is characterized in that, in at least one layer (11, 12, 13, 14, 101, 102, 103, 104) of the coil section (42; 43) N (with N?2), superconducting wire sections (A, B, C, D, E) are wound in parallel, such that the windings of the N wire sections (A, B, C, D, E) are adjacent to each other and the N wire sections (A, B, C, D, E) are connected in series. The inventive magnetic field coil can be produced at highly reduced costs, in particular, when the magnetic field coil has a comparatively large layer length.

Abstract: There is provided a superconductive cable capable of absorbing an amount of contracting a superconductive wire member in cooling by a simple constitution. A superconductive cable according to the invention is a cable including a superconductive wire member constituting a superconductive layer (a conductor layer 13, a return line conductor 17) by being wound spirally, a stress relaxation layer (an inner side stress relaxation layer 12, and insulating layer/outer side stress relaxation layer 16) provided on an inner side of the superconductive layer, and a cable constituting member (a former 11) provided on an inner side of the stress relaxation layer. The cable is constituted to absorb an amount of contracting the superconductive layer in accordance with cooling the superconductive wire member by a refrigerant in a diameter direction by the stress relaxation layer.

Abstract: A superconducting wire includes first and second superconducting layers disposed on one or more substrates in stacked relationship, the first superconducting layer comprising a high temperature superconducting oxide of a first composition and the second superconducting layer comprising a high temperature superconducting layer of a second composition, wherein the first and second compositions are different. The first superconductor layer optionally includes a high temperature superconductor composition selected to provide enhanced critical current (Ic(c)) in the presence of magnetic fields perpendicular to surface of the superconducting layer (H//c). The second superconductor layer optionally includes a high temperature superconductor composition selected to provide enhanced critical current (Ic) in the presence of magnetic fields parallel to surface of the superconducting layer (H//ab).

Abstract: Tape-shaped superconducting wires, and a superconducting coil formed from said wires, wherein a plurality of electrically separated superconducting film parts, each having a rectangular cross section and arranged in parallel, form parallel conductors, providing superconducting wires capable of containing losses incurred in the presence of alternating current (A/C). A superconducting coil is made by winding the superconducting wires, wherein the coil structure contains at least a part wherein perpendicular interlinkage magnetic fluxes acting among conductor elements of the parallel conductors by the distribution of magnetic fields generated by the superconducting coils cancel mutually in order to contain circulating current within the wires and to make shunt current uniform, thereby providing a low-loss A/C superconducting coil.

Abstract: A magnetic repulsion type bearing includes a plurality of induction iron pieces, a stator, a rotor, an outer casing, an inner casing and a current controlling device. The rotor is disposed inside the stator, and the iron pieces of the rotor and the iron pieces of the stator are arranged in an alternate manner so that the rotor may be fixedly held in the stator through the magnetic repulsion between them. Also, the outer casing and the inner casing enclose the rotor and the stator so as to shield the electromagnetic force. In addition, the current controlling device may be used to control the amount of current and the direction of the current flow so as to control the strength of the electromagnetic force and the polarity.

Abstract: A rectangular coil has several successive windings which are made of a strip-shaped super conductor, which contains at least one core which is embedded in a normal conductive matrix material and which is made of a high-Tc-super conductor material. The coil is made of a strip-shaped superconductor and does not have additional insulation.

Abstract: A system and method for generating a magnetic field in a rotating machine. In one embodiment, a primary winding assembly is configured to generate a rotatable magnetic field. The assembly is connected to receive multiple signals of different phases to effect field rotation. A set of secondary windings is positioned for generation of current based on magnetic coupling during the field rotation. The secondary windings include conductor capable of supporting superconducting current flow. A rotatable machine includes a stator and a rotor winding coupled for rotation with respect to the stator. The secondary windings are formed in a circuit for providing superconducting current through the rotor winding.

Abstract: Tape-shaped superconducting wires, and a superconducting coil formed from said wires, wherein a plurality of electrically separated superconducting film parts, each having a rectangular cross section and arranged in parallel, form parallel conductors, providing superconducting wires capable of containing losses incurred in the presence of alternating current (A/C). A superconducting coil is made by winding the superconducting wires, wherein the coil structure contains at least a part wherein perpendicular interlinkage magnetic fluxes acting among conductor elements of the parallel conductors by the distribution of magnetic fields generated by the superconducting coils cancel mutually in order to contain circulating current within the wires and to make shunt current uniform, thereby providing a low-loss A/C superconducting coil.

Abstract: A superconducting magnet coil configuration has at least one section containing a superconducting strip conductor which is wound in several layers like a solenoid in a cylindrical winding chamber (1) between two end flanges (2, 3), characterized in that the radially innermost layers of the section consist of metallic low-temperature superconductors (LTS) (LTS layers (8)) and radially adjacent layers of the section are formed from high-temperature superconductor (HTS) material (HTS layers (9)). The invention proposes a magnet coil configuration using HTS material which has a notch structure for correcting inhomogeneities and homogenizing a compact high-field magnet, wherein the mechanical load on the HTS strip conductor is minimized.

Abstract: The present invention discloses a pancake-type bifilar winding module using a superconducting wire and a winding bobbin therefor.

Abstract: A method for reducing ac loss in a superconducting coil of cable-in-conduit type superconductor made from chrome-coated compound superconducting strands, characterized in that when a superconducting coil is produced by the wind-and-react technique, bending or twist strain is applied in an amount of 0.15˜0.3% to the conductor cable portion after it has been heat-treated to form the superconducting compound, thereby separating the individual superconducting strands the chrome coat on which sintered as the result of heat treatment and further characterized in that the applied bending or twist strain is thereafter reverted to 0.1% or less, thereby reducing the ac loss of the superconducting coil.

Abstract: A method of forming magnets using stacked superconducting films-disks of coated conductor is described. The superconducting material may be either from the oxide high temperature superconducting (HTS) class or the metallic/inter-metallic low temperature superconducting (LTS) class. An LTS metallic or inter-metallic compound can include Nb, Va, Ti, Hg, Pb, NbTi, Nb3Sn, Nb3Al, etc. or the more recently discover MgB2. An oxide superconductor refers to the RE-Ba2Cu3Ox compound, wherein RE=Y, Nd, La, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu; the Bi2Sr2CaCu2Ox, the (Bi, Pb)2Sr2CaCu2Ox, Bi2Sr2Ca2Cu3Ox or (Bi, Pb)2Sr2Ca2Cu3Ox compound; the Tl2Ca1.5BaCu2Ox or Tl2Ca2Ba2Cu3Ox compound; or a compound involving substitution such as the Nd1+xBa2?xCu3Ox compounds.

Abstract: A circuit is provided wherein the electronic properties of the circuit are varied by a magnetic actuator. The circuit includes a fixed substrate and a movable substrate. The magnetic actuator comprises a magnetic driver on an upper surface of the fixed substrate that is substantially overlapped by an HTS reaction plate on the lower surface of the fixed substrate. A tuning current applied through a continuous strip of HTS material in the magnetic driver induces a repulsive magnetic force causing the movable substrate to move with respect to the fixed substrate.

Abstract: Superconducting cables and magnetic devices are disclosed.

Abstract: At temperatures located in a cryogenic temperature range, nickel steel is used for components, which can be subjected to high levels of mechanical stress and which have ferromagnetic properties at these temperatures.

Abstract: A method includes providing a superconducting material having pinning sites that can pin magnetic vortices within the superconducting material. The method also includes pinning one or more magnetic vortices at one or more of the pinning sites. An information storage apparatus includes a superconducting material, doped particles within the superconducting material that can pin dipole magnetic vortices, a magnetic tip that generates pinned magnetic vortices and a magnetic detector that detects pinned magnetic vortices.

Abstract: The invention concerns an NMR (nuclear magnetic resonance) high field magnet coil system comprising superconducting conductor structures for generating a homogeneous magnetic field B0 in a measuring volume (23) with several radially nested solenoidal coil sections (12, 13, 31), which is characterized in that the radially innermost coil section (31) is wound with a band-shaped superconductor with an aspect ratio (width to thickness) >3 on a coil support which axially projects, at least at one axial end, past the winding packet of the radially neighboring coil section (12) and the band-shaped superconductor is guided on this side tangentially towards the outside to a region of reduced magnetic field strength and terminates in at least one electrical connecting point (16). This permits use of a brittle band-shaped superconductor for the innermost coil system (31) which cannot be strongly bent at the upper edge.

Abstract: A superconducting high-field magnet coil (1; 27; 38) comprising at least one radially inner (2) and at least one radially outer coil section (3; 32; 33), wherein at least the radially inner coil section (2) is wound in a solenoid-shaped fashion with an HTS (high temperature superconductor) band conductor (14; 20; 36) and wherein at least one superconducting connection is provided between the radially inner coil section and the radially outer coil section is characterized in that the superconducting connection comprises a first superconducting joint (5; 39) between two HTS band conductors at which the HTS band conductor of the radially inner coil section is connected to at least one further HTS band conductor (6; 21, 22; 29; 40), flatly overlapping same, such that the two HTS band conductors mutually subtend an angle of between 30° and 150°, and with a second superconducting joint (7; 41) which is electrically connected in series with the first, and which is geometrically disposed in a region of consid

Abstract: The invention features an internally supported superconducting coil assembly. The invention includes several superconducting windings and at least one internal coil support member that forms a laminate stack alternating between an internal support member and a superconducting winding.

Abstract: A process for manufacturing superconducting magnetic coils from strain-tolerant, superconducting multi-filament composite conductors is described. The method involves winding the precursor to a multi-filament composite conductor and an insulating material or its precursor around a mandrel in order to form a coil, and then exposing the coil to high temperatures and an oxidizing environment. The insulating material or its precursor is chosen to permit exposure of the superconductor precursor filaments to the oxidizing environment, and to encase the matrix-forming material enclosing the filaments, which is reversibly weakened during processing.

Abstract: A superconducting very high field magnet coil with several solenoidal multi-layer coil sections which are wound in layers onto a hollow cylindrical support body (3) about a common central axis a, and which are electrically connected in series to carry a current in excess of 100 A is characterized in that the radially innermost coil section (1) comprises superconducting wire (2) which contains oxidic, high temperature superconductor (HTS) material, wherein the layers of the radially innermost coil section (1) are helically wound such that there is a free axial space between the walls, which is then sealed.

Abstract: The cross section of a wire is round and is composed of several units, each consisting of tape-like superconductors laminated in an approximately rhombic shape, which are arranged such that they form a hexagon as a whole. Oxide superconducting tape wires each consisting of a plurality of oxide superconducting filaments are arranged in rotational symmetry to a core. The oxide superconducting filaments have the cross section such that the average thickness is 3 to 20 &mgr;m and the average aspect ratio is larger than 2 and smaller than 10. A step of arranging the oxide superconducting tape-like wires in rotational symmetry is accomplished when the multi-core tape-like wires are packed in a third metal pipe which becomes a metal sheath later. Since the multi-core tape wires having oxide superconducting filaments are arranged in rotational symmetry, the oxide superconductor in the oxide superconducting filaments permits its c axis to orient in various directions.

Abstract: A circuit is provided wherein the electronic properties of the circuit are varied by a magnetic actuator. The circuit includes a fixed substrate and a movable substrate. The magnetic actuator comprises a magnetic driver on an upper surface of the fixed substrate that is substantially overlapped by an HTS reaction plate on the lower surface of the fixed substrate. A tuning current applied through a continuous strip of HTS material in the magnetic driver induces a repulsive magnetic force causing the movable substrate to move with respect to the fixed substrate.

Abstract: A current lead including a high-temperature superconductor and a normal conductive component is coupled to a superconducting device. Electric current is delivered through the current lead at a level above the critical current carrying capacity of the high-temperature superconductor, creating a current-sharing mode of conductance through at least part of both the superconducting component and the normal conductive component.

Abstract: This invention provides a radiation curable coating composition for superconducting wires. The coating composition comprises at least one (meth)acrylate terminated urethane oligomer, at least one adhesion promoter, at least one (meth)acrylate functionalized diluent and at least one free radical photoinitiator.

Abstract: A tunable filter having a fixed substrate, a first and second plate comprising a high-temperature superconductor material on the fixed substrate, a movable substrate, a mechanical driver attached to the fixed substrate and the movable substrate, a floating plate comprising a high-temperature superconductor material on the fixed substrate wherein the floating plate, the first plate, and the second plate define a gap, and wherein the gap is varied by length changes in the mechanical driver is provided.

Abstract: There is described a method of applying insulative coating on high temperature superconductors and low temperature superconductors from sol-gel solutions prepared from Zr or Zr with one of, Mg, Y, Ce, In and Sn based precursor materials. The solution is prepared with isopropanol as a solvent and acetyl acetone as a catalyst. The conductors are dipped into the solution and thereafter dried at a temperature effective to evaporate the solvent. Thereafter, heat treatment in the presence of oxygen is applied at a temperature sufficient to oxidize the precursors to result in a ceramic insulative coating on the conductor.

Abstract: A high temperature superconductor composite material capable of working at liquid nitrogen and higher temperatures K>77 has a sintered compound of intermixed components including high temperature superconductor ceramics, a silver dope, and sintering products of interaction of the superconductor ceramics and the silver dope with silicone material.

Abstract: A superconducting magnetic coil includes a first superconductor formed of an anisotropic superconducting material for providing a low-loss magnetic field characteristic for magnetic fields parallel to the longitudinal axis of the coil and a second superconductor having a low loss magnetic field characteristic for magnetic fields perpendicular to the longitudinal axis of the coil. The first superconductor has a normal state resistivity characteristic conducive for providing current limiting in the event that the superconducting magnetic coil is subjected to a current fault.

Abstract: A radiation curable coating composition for superconducting wires including at least one (meth)acrylate terminated urethane oligomer, at least one adhesion promoter, at least one (meth)acrylate functionalized diluent and at least one free radical photoinitiator. The coating composition is able to withstand repeated thermal cycling from the ambient temperature to the critical temperature of the superconducting wire and, because the composition is radiation cured, the superconducting wire is not heated, thus avoiding degrading the superconducting wire.

Abstract: A superconducting ceramic includes a laminate and a superconducting ceramic tape joined to the laminate. The laminate and superconductor tape are joined such that the tape is under a compressive stress. The compressive stress is of a greater amount than the compressive stress which results from differences in thermal expansion of the tape and the laminate. The greater compressive stress can be achieved by putting the laminate under a greater tension than the superconducting ceramic tape during joining of the superconducting ceramic tape to the laminate.

Abstract: A superconducting oxide wire and a method of manufacturing the same are disclosed. The wire comprises a pipe made of a metal and a superconducting oxide material filling the interior of the pipe and comprising superconducting oxide grains which are bonded to each other and which have a perovskite crystal structure having a C face and a C axis. The superconducting oxide grains contain more than 50 vol % of plate-shaped grains of which the length in the direction of the C face is greater than the length in the direction of the C axis. The C faces of most the plate-shaped grains are arranged to be directed toward longitudinal axis of the pipe.

Abstract: A superconducting coil mounted on, and in heat transfer relationship with, a heat conducting support cylinder. The superconducting coil is electrically insulated from the support cylinder by means of a refractory ceramic coating, such as aluminum oxide, on the surface of the cylinder or on an intermediate layer which itself is on the surface of the cylinder. To resist Lorentz forces, the superconducting coil may be positioned within a helical groove machined into the inside or outside surface of the cylinder.

Abstract: A superconducting magnetic coil includes a plurality of sections positioned axially along the longitudinal axis of the coil, each section being formed of an anisotropic high temperature superconductor material wound about a longitudinal axis of the coil and having an associated critical current value that is dependent on the orientation of the magnetic field of the coil. The cross section of the superconductor, or the type of superconductor material, at sections along the axial and radial axes of the coil are changed to provide an increased critical current at those regions where the magnetic field is oriented more perpendicularly to the conductor plane, to thereby increase the critical current at these regions and to maintain an overall higher critical current of the coil.

Abstract: A superconducting magnetic coil includes a first superconductor formed of an anisotropic superconducting material for providing a low-loss magnetic field characteristic for magnetic fields parallel to the longitudinal axis of the coil and a second superconductor having a low loss magnetic field characteristic for magnetic fields perpendicular to the longitudinal axis of the coil. The first superconductor has a normal state resistivity characteristic conducive for providing current limiting in the event that the superconducting magnetic coil is subjected to a current fault.

Abstract: In application to a superconducting magnet which is cooled by a cryogenic refrigerator, provided is a superconducting coil which can maintain a cooled state and enables a stable operation and continuous driving even if a ramping speed is increased. First and second superconducting conductors are connected with each other. Respective tape-like superconducting multifilamentary wires are electrically connected with each other through solder, to form joint bodies. The respective joint bodies are insulated from each other by interposition of an insulating material therebetween.

Abstract: In order to provide a crystal oriented high quality thallium group superconducting wire having a high critical current density, thallium group superconducting film is formed on oxide single crystal fiber having plane facets and polygonal cross section in the thallium group superconducting wire, wherein c-axis of the thallium group superconducting film is oriented perpendicularly, and a- and b-axis are oriented in parallel to the longitudinal direction of the above fiber, respectively, and resulting to obtain a high quality thallium group superconducting wire with Jc of 10.sup.5 A/cm.sup.2 or more at 77K.

Abstract: An elongate superconductor wiring element having, as seen in section, oxide superconductor material regions in each of which the c-axes of the oxide superconductor crystals are aligned with each other and are transverse to the longitudinal axis of the element. To reduce the dependence of critical current density on angular position of the element relative to a magnetic field, there are a plurality of said regions whose alignment directions of the c-axes are different as between different ones of said regions, so that the wiring element comprises a plurality of said regions having respectively different c-axis alignment directions.

Abstract: A process for manufacturing superconducting magnetic coils from strain-tolerant, superconducting multi-filament composite conductors is described. The method involves winding the precursor to a multi-filament composite conductor and an insulating material or its precursor around a mandrel in order to form a coil, and then exposing the coil to high temperatures and an oxidizing environment. The insulating material or its precursor is chosen to permit exposure of the superconductor precursor filaments to the oxidizing environment, and to encase the matrix-forming material enclosing the filaments, which is reversibly weakened during processing.

Abstract: A superconducting coil bas a winding wire portion which is formed by winding a superconducting wire covered with an insulating material around a winding frame composed of such a material that its modulus of longitudinal elasticity is 50 (GPa) or greater, and its thermal contraction rate between a room temperature and a temperature of 77 (K) is 0.35% or above while applying a tensile force thereto, and a bonding material impregnated between the superconducting wires and is then solidified by a heat treatment to reduce a contact surface pressure between the winding wire portion and the winding frame, preventing transition to a normal conductive state.

Abstract: In order to make it possible to produce superconducting coils with small overall height, they are made from a plurality of coil subunits, optionally with a plurality of layers for each coil subunit, in particular in the case of the low-voltage coil of a transformer. The coil subunits contain as electrical conductor a high-temperature superconductor, around which a fibrous glass is spun and which is embedded in a glass-fiber reinforced epoxy resin or in a plastic. The coil subunits are placed around a transformer core in a cryostat.