Abstract: An apparatus and process for the production of a niobium cavity exhibiting high quality factors at high gradients is provided. The apparatus comprises a first chamber positioned within a second chamber, an RF generator and vacuum pumping systems. The process comprises placing the niobium cavity in a first chamber of the apparatus; thermally treating the cavity by high temperature in the first chamber while maintaining high vacuum in the first and second chambers; and applying a passivating thin film layer to a surface of the cavity in the presence of a gaseous mixture and an RF field. Further a niobium cavity exhibiting high quality factors at high gradients produced by the method of the invention is provided.

Abstract: An arrangement for electrically conductively connecting two electrical units by means of a bipolar high voltage direct current transmission, in which between the units are arranged at least two electrical direct current cables constructed as superconductive cables. The superconductive cables are mounted separately from each other in a cryostat (1,2) suitable for conducting a cooling agent which has at least one metal pipe provided with a thermal insulation. The cryostats (1,2) are connected with at least one of their ends to a cooling plant (7) supplying the cooling agent and a pipeline (3) is placed parallel to the two cryostats (1,2). The pipeline (3) is connected at both its ends to the two cryostats (1,2) through valves (15,16,17) which are closed during uninterrupted operation and, in the case of an interruption at one of the superconductive cables, the pipeline (3) serves with the then open valves for conducting the cooling agent intended for the cryostat of the impaired cable.

Abstract: A superconducting accelerating cavity production method with which a high-quality superconducting accelerating cavity can be produced with a compact device configuration and at low cost. The method of producing a superconducting accelerating cavity (1) includes arranging, in an axial direction (L), a plurality of half-cells (5) having openings at both ends in the axial direction and joining the openings to one another by welding. The half-cells (5) are joined by welding with a laser beam from the inside of the superconducting accelerating cavity (1) in which a vacuum atmosphere is created.

Abstract: A cryogenically-cooled HTS cable is configured to be included within a utility power grid having a maximum fault current that would occur in the absence of the cryogenically-cooled HTS cable. The cryogenically-cooled HTS cable includes a continuous liquid cryogen coolant path for circulating a liquid cryogen. A continuously flexible arrangement of HTS wires has an impedance characteristic that attenuates the maximum fault current by at least 10%. The continuously flexible arrangement of HTS wires is configured to allow the cryogenically-cooled HTS cable to operate, during the occurrence of a maximum fault condition, with a maximum temperature rise within the HTS wires that is low enough to prevent the formation of gas bubbles within the liquid cryogen.

Abstract: A superconducting coil and a rotating device, the performances of which are improved, and a superconducting coil manufacturing method are provided. A superconducting coil 10 is a saddle-shaped superconducting coil formed by winding a superconducting wire so as to form a race-track-like shape. The superconducting coil includes a curved portion 10b and a straight portion 10a connected to the curved portion 10b. In the curved portion 10b, an upper edge 10c is positioned closer to an inner peripheral side than a lower edge 10d is, and in the straight portion 10a, the upper edge 10c is positioned closer to an outer peripheral side than the lower edge 10d is.

Abstract: This invention relates to a superconductor device, comprising: a superconductor; a former which supports the superconductor; and, an intermediate electrical connector attached to the former for coupling the superconductor to a power source, wherein the intermediate electrical connector is connected to the superconductor via a deformable portion in the intermediate electrical connector, wherein the deformable portion allows relative movement between the superconductor and former.

Abstract: The present invention is configured such that, in a low AC loss oxide superconductor constituted by providing an oxide superconducting layer 6 on a substrate 1, said oxide superconducting layer 6 is separated into a plurality of filament conductors 2 in parallel to the lengthwise direction of said substrate 1 by dividing grooves 3 plurally formed in the widthwise direction of said substrate, and a high-resistance oxide 8 is formed in said dividing grooves 3. Because of the invention, it is possible to increase the insulation properties of individually divided mated filament conductors, and to obtain an oxide superconductor that has low AC loss.

Abstract: Disclosed is an iron-based superconducting wire comprising a tubular material formed mainly from iron, and an iron-based superconductor formed in the tubular material, wherein the iron-based superconductor contains the iron forming the tubular material as a chemical constituent element of the iron-based superconductor.

Abstract: Provided is a coating solution where, upon producing a rare-earth superconductive composite metal oxide film by means of a coating-pyrolysis method, cracks are not generated in the heat treatment process for eliminating organic components, even when the thickness of the rare-earth superconductive film produced in a single coating is 500 nm or more, and without having to repeat the coating and annealing process. A solution for producing a rare-earth superconductive film which is made into a homogeneous solution by dissolving, in a solvent formed by adding a polyhydric alcohol to a univalent linear alcohol having a carbon number of 1 to 8 and/or water, a metal complex coordinated, relative to metal ions of a metallic species containing rare-earth elements, barium and copper, with pyridine and/or at least one type of tertiary amine, at least one type of carboxylic acid having a carbon number of 1 to 8, and, as needed, an acetylacetonato group.

Abstract: A connector assembly of a superconducting fault current limiter includes a first superconducting tape element, an electrical connector electrically coupled to the first superconducting element at a first region of the electrical conductor, and a second superconducting tape element electrically coupled to the electrical connector in a second region of the electrical connector. The electrical connector comprises a unitary structure. The first superconducting tape element, the electrical connector, and the second superconducting tape element comprise may comprise a layer.

Abstract: SQUIDs may detect local magnetic fields. SQUIDS of varying sizes, and hence sensitivities may detect different magnitudes of magnetic fields. SQUIDs may be oriented to detect magnetic fields in a variety of orientations, for example along an orthogonal reference frame of a chip or wafer. The SQUIDS may be formed or carried on the same chip or wafer as a superconducting processor (e.g., a superconducting quantum processor). Measurement of magnetic fields may permit compensation, for example allowing tuning of a compensation field via a compensation coil and/or a heater to warm select portions of a system. A SQIF may be implemented as a SQUID employing an unconventional grating structure. Successful fabrication of an operable SQIF may be facilitated by incorporating multiple Josephson junctions in series in each arm of the unconventional grating structure.

Abstract: A method of forming a delta niobium nitride ?-NbN layer on the surface of a niobium object including cleaning the surface of the niobium object; providing a treatment chamber; placing the niobium object in the treatment chamber; evacuating the chamber; passing pure nitrogen into the treatment chamber; focusing a laser spot on the niobium object; delivering laser fluences at the laser spot until the surface of the niobium object reaches above its boiling temperature; and rastering the laser spot over the surface of the niobium object.

Abstract: The method in accordance with the present invention has steps of: preparing a hydrogen producing device with a high gravitational rotating packed bed, initiating the device, adjusting the temperature of the device, inputting a reagent gas and a liquid vaporized for mixing with the reagent gas into a reagent mixture, and passing the reagent mixture through the device to obtain hydrogen.

Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: A multilayer superconducting wire 7 with essentially round cross sectional area where the outer surface of the round wire is provided with a high temperature superconductor layer 3 and where at least the high temperature superconductor layer 3 is fabricated as a spiral running along the length of the superconductor wire 7 in parallel lanes 15.

Abstract: The invention pertains to creating new extremely low resistance (“ELR”) materials, which may include high temperature superconducting (“HTS”) materials. In some implementations of the invention, an ELR material may be modified by depositing a layer of modifying material unto the ELR material to form a modified ELR material. The modified ELR material has improved operational characteristics over the ELR material alone. Such operational characteristics may include operating at increased temperatures or carrying additional electrical charge or other operational characteristics. In some implementations of the invention, the ELR material is a cuprate-perovskite, such as, but not limited to YBCO. In some implementations of the invention, the modifying material is a conductive material that bonds easily to oxygen, such as, but not limited to, chromium.

Abstract: Novel articles and methods to fabricate the same resulting in flexible, oriented, semiconductor-based, electronic devices on {110}<100> textured substrates are disclosed. Potential applications of resulting articles are in areas of photovoltaic devices, flat-panel displays, thermophotovoltaic devices, ferroelectric devices, light emitting diode devices, computer hard disc drive devices, magnetoresistance based devices, photoluminescence based devices, non-volatile memory devices, dielectric devices, thermoelectric devices and quantum dot laser devices.

Abstract: A superconducting coil apparatus and a superconducting apparatus including the superconducting coil apparatus are provided. The superconducting coil apparatus includes a superconducting coil 10, an inner container 50 that holds the superconducting coil 10 therein, and an outer container 60. The inner container 50 and the outer container 60 are made of FRP. At a corner portion 71 of the inner container 50 and the outer container 60, a sealing reinforcement portion 2 made of a resin is formed so as to extend along the corner portion 71. Opening portions 53 and 63 are formed in side surfaces of the inner container 50 and the outer container 60. The sealing reinforcement portion 2 is disposed at the corner portion 71 of the opening portions 53 and 63, whereby the sealing performance of the container can be improved.

Abstract: An oxide superconducting conductor of the invention is configured to include an oxide superconducting layer including a substrate and an oxide superconductor formed on the substrate. The oxide superconductor being expressed by a composition formula of RE1Ba2Cu3Oy where RE represents a rare earth element and an expression of 6.5<y<7.1 is satisfied. A normal conduction phase including Ba and a different phase including an alkaline earth metal having an ionic radius smaller than that of Ba are dispersed in the oxide superconducting layer. The normal conduction phase is an oxide including Ba and one selected from a group consisting of Zr, Sn, Hf, Ce, and Ti.

Abstract: A superconducting integrated circuit may include a magnetic flux transformer having an inner inductive coupling element and an outer inductive coupling element that surrounds the inner inductive coupling element along at least a portion of a length thereof. The magnetic flux transformer may have a coaxial-like geometry such that a mutual inductance between the first inductive coupling element and the second inductive coupling element is sub-linearly proportional to a distance that separates the first inner inductive coupling element from the first outer inductive coupling element. At least one of the first inductive coupling element and the second inductive coupling element may be coupled to a superconducting programmable device, such as a superconducting qubit.