Abstract: This invention provides a production process of a thick-film tape-shaped RE-type (123) superconductor having a high critical current value. The production process comprises providing a composite substrate comprising Gd2Zr2O7 and CeO2 stacked in that order onto a Hastelloy substrate, coating a raw material solution prepared by dissolving a trifluoroacetate of Y and Ba and a naphthenate of Cu onto the composite substrate, heat treating the coated composite substrate by calcination, then subjecting the calcined assembly to intermediate heat-treatment at a temperature below the temperature of heat-treatment for superconductor production, and then heat treating the assembly in an argon gas atmosphere under conditions of highest heating temperature 760° C., water vapor partial pressure 13.5%, and oxygen partial pressure 0.09% for superconductor production to produce a tape-shaped RE-type (123) superconductor comprising a YBCO superconducting film having a thickness of more than about 2 ?m.

Abstract: An RE123-based oxide superconductor characterized by comprising a conductive layer containing an REBa2Cu3O7-?-based oxide superconductor formed using a mixed material of at least RE2BaO4 and a Bax—Cuy—Oz-based material and a holding member which holds said conductive layer, where, RE is one type or more of elements selected from La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Y.

Abstract: This invention provides a production process of a tape-shaped superconductor which can realize high Jc and Ic values by virtue of the elimination of the cause of generation of cracks and deterioration of an electrical connectivity in crystal grain boundaries. In producing an Re-base (123) superconductor on a substrate by an MAD process, the use of a raw material solution having a Re:Ba:Cu molar ratio of 1:X:3, wherein X is a Ba molar ratio satisfying X<2 (preferably 1.0?X?1.8, especially 1.3?x?1.7), can realize the production of a thick-film tape-shaped superconductor having a superconductivity of Jc=3.20 MA/cm2 and Ic=525 A/cm (X=1.5).

Abstract: A superconductive thin film material which achieves good superconductivity by preventing an element diffusion reaction and a manufacturing method of the superconductive thin film material are provided. A superconductive thin film material is provided with a substrate, an intermediate layer with one layer or at least two layers formed on the substrate, and a superconductive layer formed on the intermediate layer. The intermediate layer has a thickness of not less than 0.4 ?m. The material for forming the intermediate layer is preferably oxide having a crystal structure, which is at least one of a halite type, a fluorite type, a perovskite type, and a pyrochlore type.

Abstract: A superconductor structure is manufactured by forming a channel within a substrate along a surface of the substrate, depositing a material within the channel of the substrate, where the material includes one of a superconductor material and a precursor for a superconductor material, and thermally treating the substance within the channel of the substrate so as to form an elongated superconductor wire formed as a single, cohesive structure. The substrate can further include a plurality of channels with superconductor wires formed within the channels. In addition, a cable is formed including a bundle of individual superconductor wires arranged at different spatial positions with respect to each other.

Abstract: A Josephson junction (JJ) device includes a buffered substrate comprising a first buffer layer formed on a substrate. A second buffer layer is formed on the first buffer layer. The second buffer layer includes a hexagonal compound structure. A trilayer structure is formed on the buffered substrate comprising at least two layers of a superconducting material. A thin tunnel barrier layer is positioned between the at least two layers. The buffered substrate is used to minimize lattice mismatch and interdiffusion in the trilayer structure so as to allow the JJ device to operate above 20 K.

Abstract: An oxide superconductor with superconduction properties being improved by effectively introducing a pinning center thereinto and its fabrication method are disclosed. The superconductor has a high-crystallinity oxide superconductor film which is formed on a substrate with a <001> direction of crystal grain being oriented almost perpendicularly to the substrate and with (100) planes of neighboring crystal grains being oriented to form an oblique angle ranging from 0 to 4 degrees or 86 to 90 degrees. The film has a multilayer structure including a plurality of high-density magnetic field trap layers stacked in almost parallel to the substrate and a low-density magnetic field trap layer sandwiched therebetween. An average grain boundary width of the high-density trap layers in a cross-section horizontal to the substrate is 80 nm or less. The width is less than an average grain boundary width of the low-density trap layer in its cross-section horizontal to the substrate.

Abstract: In a cold gas spraying method, a gas jet (15) into which particles (19) are introduced is generated with the aid of a cold gas spray gun (20). The kinetic energy of the particles (19) results in a layer being formed on a substrate (13). The substrate is provided with a structured texture (24) which is transferred to the layer (20) that is formed. The method makes it advantageously possible to produce a high-temperature superconducting layer on the substrate (13) by selecting an appropriate particle (19) composition. The process can be additionally supported using a heating device (25) in a subsequent thermal treatment step.

Abstract: Methods and compositions for the deposition of a film on a substrate. In general, the disclosed compositions and methods utilize a precursor containing calcium or strontium.

Abstract: A method of manufacturing a superconducting thin film material includes a vapor phase step of forming a superconducting layer by a vapor phase method and a liquid phase step of forming a superconducting layer by a liquid phase method so that the latter superconducting layer is in contact with the former superconducting layer. Preferably, the method further includes the step of forming an intermediate layer between the former superconducting layer and a metal substrate. The metal substrate is made of a metal, and preferably the intermediate layer is made of an oxide having a crystal structure of any of rock type, perovskite type and pyrochlore type, and the former superconducting layer and the latter superconducting layer both have an RE123 composition. Accordingly, the critical current value can be improved.

Abstract: Under one aspect, a method of making a superconductor wire includes providing an oxide superconductor layer overlaying a substrate; forming a substantially continuous barrier layer over the oxide superconductor layer, the barrier layer including metal; depositing a layer of metal particles over the barrier layer, said depositing including applying a liquid including metal particles over the barrier layer; and sintering the layer of metal particles to form a substantially continuous metal layer over the barrier layer. In one or more embodiments, the oxide superconductor layer is oxygen-deficient, and the method may include oxidizing the oxygen-deficient oxide superconductor layer. At least a portion of the sintering and the oxidizing may occur simultaneously, for example by performing them at an oxygen partial pressure and a temperature sufficient to both sinter the metal particles and to oxidize the oxygen-deficient oxide superconductor layer.

Abstract: An oxide superconductor article having an oxide superconductor layer of a predetermined pattern is prepared by continuously advancing a wire having a textured surface into a deposition zone, dispensing droplets of a precursor solution to an oxide superconductor from a reservoir and the depositing droplets onto the textured surface of the wire that is introduced into the deposition zone, heating the wire or tape in the reaction zone under conditions to convert the precursor solution into an oxide superconductor; and collecting the wire after heating.

Abstract: There are provided superconducting materials (2) comprising a substrate (4); an interface layer (6) on the substrate, comprising a material of formula XwBaxCuyLtOz, and a superconducting layer (8) on the interface layer comprising a compound of formula XaBabCucOd? Also provided are methods of manufacturing superconducting materials and materials produced by these methods.

Abstract: A superconductor coating inclusive, tape-like electrical conductor and windings using such conductor for magnets and electrical machines, etc. The described windings are suited for inclusion of successor superconductor materials such as yttrium barium copper oxide wherein magnetic flux related losses can potentially be excessive and preclude successful machine operation. Winding orientation and configuration of the conductor in an alternating current machine for lower losses are disclosed along with methods and apparatus for achieving the desired windings. Windings intended for differing locations within a machine of this type are made possible by the invention. Equations relating to magnetic losses incurred in such windings are also disclosed.

Abstract: There is provided a method of efficiently producing a superconductive material more excellent in properties, and large in area when executing thermal decomposition of a metalorganic compound, and formation of a superconductive material with heat treatment.

Abstract: A method of manufacturing a superconducting thin film material includes the step of forming an intermediate layer, the step of forming one superconducting layer to be in contact with the intermediate layer and the step of forming another superconducting layer by a vapor phase method to be in contact with the one superconducting layer. Between the step of forming the intermediate layer and the step of forming the one superconducting layer, the intermediate layer is kept in a reduced water vapor ambient or reduced carbon dioxide ambient or, between the step of forming one superconducting layer and the step of forming another superconducting layer, the one superconducting layer is kept in a reduced water vapor ambient or reduced carbon dioxide ambient. Thus, the critical current value can be improved.

Abstract: A method of making a film having a uniform thickness and having a crystal axis parallel to a main surface of a substrate is described. In a deposition method, a film is formed by scattering a deposition material from a target (12) surface and growing the scattered deposition material on a main surface (100a) of a substrate (100). The method includes the steps of positioning the substrate (100) into a first state where the distance between one end (100f) and the target (12) is small and the distance between the other end (100e) and the target material (12) is relatively large, forming a first film (110) on the substrate (100) in the first state, positioning the substrate (100) into a second state where the distance between one end (100f) and the target (12) is large and the distance between the other end (100e) and the target (12) is small, and. forming a second film (120) on the first film (110) in the second state.

Abstract: High-temperature superconductivity confined to nanometer-scale interfaces has been a long standing goal because of potential applications in electronic devices. The spontaneous formation of a superconducting interface in bilayers consisting of an insulator (La2CuO4) and a metal (La1?xSrxCuO4), neither of which is superconducting per se, is described. Depending upon the layering sequence of the bilayers, Tc may be either ˜15 K or ˜30 K. This highly robust phenomenon is confined to within 2-3 nm around the interface. After exposing the bilayer to ozone, Tc exceeds 50 K and this enhanced superconductivity is also shown to originate from a 1 to 2 unit cell thick interfacial layer. The results demonstrate that engineering artificial heterostructures provides a novel, unconventional way to fabricate stable, quasi two-dimensional high Tc phases and to significantly enhance superconducting properties in other superconductors.

Abstract: An object of the present invention is to provide a method of fabricating a superconducting wire that can reduce the fabrication cost and increase the mechanical strength of the superconducting wire, and a superconducting apparatus including a superconducting wire obtained by the method. The present invention provides a method of fabricating a superconducting wire including the steps of forming a superconducting layer on a substrate or an intermediate layer formed on the substrate, forming a silver stabilization layer on the superconducting layer immersing the substrate in a copper sulfate solution after the superconducting layer and the silver stabilization layer are formed thereon, and forming a copper stabilization layer on the silver stabilization layer by electroplating with the copper sulfate solution as a plating bath. A superconducting apparatus including a superconducting wire obtained by the method is also provided.

Abstract: A method of continuously coating at least one substrate with a buffer layer as a support for a ceramic superconducting material is disclosed. The method includes loading the at least one substrate onto a respective feed spool and feeding the at least one substrate through a vacuum deposition chamber. The method further includes coating the at least one substrate while the at least one substrate is bombarded by ion beams from dual RF-ion sources forming at least one coated substrate, and reloading the at least one coated substrate onto a respective take up spool.

Abstract: A superconducting article is disclosed, including a substrate and a chemical vapor deposited thin film superconducting layer overlying the substrate, the superconducting layer having a critical current not less than about 100 A/cm width at 77K and self field. The superconducting article may be a tape, multiple tapes, or a power device, such as a power cable, power generator, or power transformer. Also disclosed are methods for manufacturing same and methods for using same.

Abstract: The invention provides an improved method of manufacturing an HTS tape coil for an MRI device with enhanced protection, the method comprising attaching high-Q capacitors at each end of an HTS wire, removing substantially all electrically conductive sheathing material on an inner side of the HTS wire, while retaining substantially all electrically conductive sheathing material on an outer side of the HTS wire. The invention also provides an HTS wire made in accordance with the foregoing method.

Abstract: A method of producing a thin layer, high-temperature superconductor strip is disclosed. In the method, a metal salt solution is formed and coated onto a substrate including a high-temperature superconductor layer. Heat is then applied directly or indirectly to the solution. The metal salt solution may contain a metal-organic salt solution or a metal inorganic metal salt solution. When an inorganic metal salt solution is utilized, a reducing solution may also be applied to the HTSC layer prior to heating. In addition, nano-sized metal particles may be added to the metal salt solution and/or the reducing solution.

Abstract: The present invention relates to epitaxial, electrically conducting and mechanically robust, cubic nitride buffer layers deposited epitaxially on biaxially textured substrates such as metals and alloys. The invention comprises of a biaxially textured substrate with epitaxial layers of nitrides. The invention also discloses a method to form such epitaxial layers using a high rate deposition method as well as without the use of forming gases. The invention further comprises epitaxial layers of oxides on the biaxially textured nitride layer. In some embodiments the article further comprises electromagnetic devices which may have superconducting properties.

Abstract: This invention provides a thin superconducting oxide film, which can realize a high critical current, and a superconducting member having a high level of electric power resistance. The superconducting member comprises a sapphire R face substrate, a buffer layer formed of grain lumps of an oxide provided on the sapphire R face substrate, and a superconducting layer provided on the buffer layer. The nearest neighbor distance between oxygen atoms in the oxide and the grain diameter of grain lumps of the oxide have been specified. The superconducting member can be used as a member for superconducting filters.

Abstract: A Bi-based oxide superconductor thin film whose c-axis is oriented parallel to the substrate and whose a-axis (or b-axis) is oriented perpendicular to the substrate, is manufactured in order to obtain a high performance layered Josephson junction using a Bi-based oxide superconductor. The method of manufacturing an a-axis oriented Bi-based oxide superconductor thin film, involves an epitaxial growth process using an LaSrAlO4 single crystal substrate of a (110) plane or a LaSrGaO4 single crystal substrate of a (110) plane, for which the lattice constant matches well with a (100) plane of a Bi-2223 oxide superconductor. By this method, rather than the normally easily obtained Bi-2212, an a-axis oriented film of Bi-2223 showing an extremely high superconductive transition temperature even for a Bi-based oxide superconductor can be selectively manufactured.

Abstract: A method includes feeding an uncoated substrate from a payout spool into a multi-chambered vacuum apparatus. The vacuum apparatus includes a plurality of deposition chambers defining an extended deposition zone, a multi-zone substrate heater located within the extended deposition zone, and multiple high-temperature superconductor (HTS) targets located within and being arranged linearly along the extended deposition zone. The multiple HTS targets include a first and second HTS target. The first and second HTS targets include a HTS material. The method farther includes translating the uncoated substrate along a translation path through the plurality of deposition chambers, impinging multiple laser beams simultaneously upon the multiple HTS targets and forming multiple overlapping plumes of HTS material within the extended deposition zone, depositing HTS material on a first major surface of the uncoated substrate to provide a coated substrate, and winding the coated substrate onto a take-up spool.

Abstract: A method for making a doped magnesium diboride powder is provided. The method includes coating a polymeric precursor on at least one of a plurality of particles of a first phase, where the first phase includes a magnesium diboride powder, where the polymeric precursor includes chemical elements yielding a second phase. The second phase includes one or more of a boride, a nitride, a carbide, an oxide, an oxy-boride, an oxy-nitride, an oxy-carbide, or combinations thereof. The method further includes forming a second phase coating onto at least one of the plurality of particles of the magnesium diboride powder.

Abstract: A superconducting thin film is disclosed having columnar pinning centers utilizing nano dots, and comprising nano dots (3) which are formed insularly on a substrate (2) and three-dimensionally in shape and composed of a material other than a superconducting material and also other than a material of which the substrate is formed, columnar defects (4) composed of the superconducting material and grown on the nano dots (3), respectively, a lattice defect (6) formed on a said columnar defect (4), and a thin film of the superconducting material (5) formed in those areas on the substrate which are other than those where said columnar defects are formed.

Abstract: To provide an oxide superconductor thick film formation method that can enhance adhesiveness of a Bi2223 thick film to a body to be processed on which the Bi2223 thick film is formed, and increase a cross-sectional area of the Bi2223 thick film, without a decrease in Jc of the Bi2223 thick film. A mixture of a compound oxide having composition Bi2212 and Pb is applied to a surface of the body to be processed, and burned to form a first thick film. An oxide superconductor thick film expressed by a general formula (Bi, Pb)2+aSr2Ca2Cu3OZ (where ?0.1?a?0.5) is formed on the first thick film.

Abstract: RE superconductive layer of high critical current density (Jc) is superimposed on an interlayer formed so as to, while ensuring cracking prevention, excel in crystallinity, such as in-plane orientation degree and direction, and surface smoothness. On an oriented Ni substrate, there are sequentially superimposed an interlayer of cerium oxide loaded with 20 to 60 mol %, in terms of metal content, of one or at least two rare earth elements according to MOD technique and an RE superconductive layer of high Jc according to MOD technique. The above interlayer is formed by mixing a Gd, Y and/or Yb organometallic compound solution with a Ce organometallic compound solution, applying the mixed solution onto an oriented Ni substrate so as to form a coating film and subjecting the coating film to calcination heat treatment and thereafter firing in an Ar—H2 atmosphere at 950 to 1150° C. under a pressure of 50 to 500 Pa. YBCO superconductive layer is formed on this interlayer according to TFA-MOD technique.

Abstract: The invention relates to a method for producing a superconductive element to be used as a wire-in-channel superconductor in magnetic resonance imaging (MRI) and in nuclear magnetic resonance (NMR) applications, which superconductive element contains a superconductive wire and a copper component having a longitudinal groove and the superconductive wire being positioned in the groove. In order to produce the wire-in-channel superconductive element by a mechanical contact between the superconductive wire and a wall of the groove in the copper component, at least one contact surface is coated with a lead free solder material before having the mechanical contact. In order to enhance the thermal and electrical conduction and to create a bond between the said components the soldering material is fused in annealing process step.

Abstract: A method for producing a superconducting wire material having a high resistivity layer outside a superconducting material, which is capable of easily forming a homogeneous high resistivity layer, a superconducting wire material and a superconducting device are provided. A raw material of superconducting wire material is coated with a first silver-containing metal to obtain a silver sheath member. This silver sheath member is coated with a non-silver metal free of silver. At least a part of the first silver-containing metal in the member coated with a non-silver metal and the non-silver metal are intermetallically compounded with each other. This intermetallically compounded metal is oxidized to form a high resistivity layer. The member having a high resistivity layer formed thereon is heat-treated to convert the aforementioned raw material to a superconducting material.

Abstract: A superconducting article and a method of making a superconducting article is described. The method of forming a superconducting article includes providing a substrate, forming a buffer layer to overlie the substrate, the buffer layer including a first buffer film deposited in the presence of an ion beam assist source and having a uniaxial crystal texture. The method further includes forming a superconducting layer to overlie the buffer layer.

Abstract: A method of forming MgB2 films in-situ on a substrate includes the steps of (a) depositing boron onto a surface of the substrate in a deposition zone; (b) moving the substrate into a reaction zone containing pressurized, gaseous magnesium; (c) moving the substrate back into the deposition zone; and (d) repeating steps (a)-(c). In a preferred embodiment of the invention, the substrate is moved into and out of the deposition zone and the reaction zone using a rotatable platen.

Abstract: A method and apparatus for manufacturing superconducting tape through an integrated process, including the steps of: heat-treating a substrate wound on a drum in a reaction chamber; continuously depositing components, constituting a buffer layer, a superconducting layer, a contact resistance layer, and a protective layer of the superconducting tape, which are supplied from a deposition chamber, on the substrate; and heat-treating the substrate deposited with the components.

Abstract: Superconductor precursor solutions are disclosed. The precursor solutions contain, for example, a salt of a rare earth metal, a salt of an alkaline earth metal and a salt of a transition metal. The precursor solutions can optionally include a Lewis base. The precursor solutions can be processed relatively quickly to provide a relatively thick and good quality intermediate of a rare earth metal-alkaline earth metal-transition metal oxide.

Abstract: Superconductor wires or layers having improved properties and methods for making the same are described. The superconducting layer includes a rare earth element—alkaline earth element—transition metal oxide having an average stacking fault density that is greater than about 0.01 nm?1, wherein two or more rare earth cations form the rare earth element. To form the superconductor layer of the present invention, a layer having a rare earth element—alkaline earth element—transition metal oxide substantially in a first crystal structure can be provided to a substrate where two or more rare earth cations form the rare earth element. The layer can then be heated at a temperature that is greater than 550° C. under oxidizing conditions to form a high-temperature superconducting layer substantially in a second crystal structure.

Abstract: A CVD apparatus capable of substantially simultaneously processing multiple portions of at least one substrate or substantially simultaneously processing portions of multiple substrates or substantially simultaneously processing multiple portions of at least one substrate and portions of multiple substrates, the CVD apparatus is described. The CVD apparatus includes a reactor, at least one substrate heater, at least one precursor supply system, at least one precursor injector, optionally, communicating with at least one temperature regulated manifold, at least one reactants mixer, and, optionally, at least one controller communicating with at least one substrate heater, the at least one precursor supply system, the at least one precursor injector, the at least one temperature regulated manifold, and combinations thereof.

Abstract: A method is provided for producing a superconductive electrical conductor (7) in which a layer of an yttrium-barium-copper oxide (YBCO) is applied as a superconductive material onto a textured metal base directly or after prior application of a buffer layer, and is subjected to a heat treatment. To this end an interlayer of a metallic material which is compatible with the crystal structure of YBCO, or with the structure of a buffer layer suitable for the application of YBCO, is initially applied all around onto an elongate metal support (1). The support (1) provided with the interlayer is subsequently processed so that predetermined texturing is imparted to the interlayer as a metal base for the layer of YBCO material or for the buffer layer. The layer of superconductive YBCO material is then applied all around, directly onto the textured interlayer or onto the buffer layer previously applied thereon, and the heat treatment is finally carried out.

Abstract: The present invention relates to a method for fabricating a filament type high-temperature superconducting wire in which a thin film type high-temperature superconducting wire is fabricated into a filament shape suitable for use with alternating current.

Abstract: The resistive current-limiting device contains a strip-shaped superconductor having a conductive structure which is made of a metallic substrate strip, an insulating, oxidic buffer layer, a super-conductive layer made of a type AB2Cu3Ox oxidically high-Tc-super conductive material, an insulating buffer layer which is arranged therebetween, and a metal cover layer. At least one of the lateral edges of the conductive structure is mechanically deformed such that the cover layer and the substrate strip are arranged in electric contact.

Abstract: The present invention relates to a method of preparing an oxide superconducting film, the method includes reacting a metal acetate containing metal M selected from the group consisting of lanthanum, neodymium and samarium with fluorocarboxylic acid having not less than three carbon atoms, reacting barium acetate with fluorocarboxylic acid having two carbon atoms, reacting copper acetate with fluorocarboxylic acid having not less than two carbon atoms, respectively, followed by refining reaction products, dissolving the reaction products in methanol such that a molar ratio of the metal M, barium and copper is 1:2:3 to prepare a coating solution, and coating a substrate with the coating solution to form a gel film, followed by calcining and firing the gel film to prepare an oxide superconducting film.

Abstract: This invention provides a method of making a fluorinated precursor of a superconducting ceramic. The method comprises providing a solution comprising a rare earth salt, an alkaline earth metal salt and a copper salt; spraying the solution onto a substrate to provide a film-covered substrate; and heating the film-covered substrate in an atmosphere containing fluorinated gas to provide the fluorinated precursor.

Abstract: A method for producing a superconducting inductive component having at least two plots, the component including at least one line segment incorporating at least one plot of the component, the line segment constituting a conducting or superconducting layer within a stack of alternately superconducting and insulating films.

Abstract: Superconductor precursor solutions are disclosed. The precursor solutions contain, for example, a salt of a rare earth metal, a salt of an alkaline earth metal and a salt of a transition metal. The precursor solutions can optionally include a Lewis base. The precursor solutions can be processed relatively quickly to provide a relatively thick and good quality intermediate of a rare earth metal-alkaline earth metal-transition metal oxide.

Abstract: The present invention provides an oxide superconductor thick film which is formed on a substrate or a board and has a high Jc and Ic and a method for manufacturing the same. Predetermined amounts of materials containing elements of Bi, Pb, Sr, Ca and Cu are weighed, mixed and subjected to steps of calcining, milling, and drying, and thereafter an organic binder and an organic vehicle are added thereto to prepare a (Bi, Pb)2+aSr2Ca2Cu3O2 superconductive paste, which is applied to the surface of a substrate or a board in a thickness of 260 ?m or more and dried. Thereafter, the paste is first subjected to burning at temperatures of 835° C. to 840° C. for 100 hours, then pressurization, and further burning at temperatures of 835° C. to 840° C. for 100 hours, thereby preparing an oxide superconductor thick film having a film thickness of 130 ?m or more having a high Jc and Ic.

Abstract: To provide a composition for a thick oxide superconducting film containing a copper salt of a branched saturated aliphatic carboxylic acid having 6 or more carbon atoms and/or a copper salt of an alicyclic carboxylic acid having 6 or more carbon atoms, which is suitable for producing thick copper based oxide superconducting films by the MOD process and which can be subjected to film formation with uniformity at a high speed, and an oxide superconductor in the form of a thick film tape which is subjected to film formation with uniformity at a high speed using the subject composition for a thick oxide superconducting film.

Abstract: A method of forming a superconducting conductor is disclosed. The method provides translating a substrate tape through a deposition chamber and along a helical path, where the helical path has multiple windings of the substrate tape and each winding of the substrate tape extends along a feed path and a return path. The method further provides depositing a HTS layer overlying the substrate tape within a deposition chamber, wherein the deposition chamber houses the substrate tape along the feed path but not the return path.

Abstract: Disclosed herein is method for making a wire comprising contacting a first end of a first superconducting wire with a second end of a second superconducting wire, wherein the superconducting wire comprises a superconducting filament having a superconducting composition comprising magnesium diboride; heating the first end of the first superconducting wire with the second end of the second superconducting wire at a point to form a joint, wherein the superconducting filament having the superconducting composition is in continuous electrical contact with any other part of the superconducting filament after the formation of the joint.