1495results about "Superconductors/hyperconductors" patented technology

The invention discloses a method for improving deformation uniformity of a core wire of an NbTi superconducting wire, and belongs to the technical field of superconducting wire processing. The method comprises the following steps: performing deep hole drilling on an oxygen-free copper ingot rod, then assembling, welding and extruding the oxygen-free copper ingot rod and a single-core rod to obtain a composite rod, and performing multi-pass drawing on the composite rod to obtain the NbTi superconducting wire with high performance, low loss and high N value. The Jc of the prepared NbTi superconducting wire is 2880-3120 A / mm < 2 >, the loss is 450-550 mJ / cm < 3 >, the N value is 70-95, compared with a superconducting wire prepared through a conventional process, the N value is remarkably increased, the loss is remarkably reduced, the critical current density is increased, and the NbTi superconducting wire has wide application prospects in MRI magnets.

The invention relates to a 1400 MPa-grade nickel-based alloy for a second-generation high-temperature superconducting base band and a preparation method of the 1400 MPa-grade nickel-based alloy, and belongs to the technical field of materials. The nickel-based alloy comprises the following chemical components in percentage by weight: 15.0 to 17.0 percent of Cr, 13.0 to 15.0 percent of Mo, 5.5 to 9.0 percent of W, 5.0 to 7.0 percent of Fe, 0.4 to 0.6 percent of Mn, 0.01 to 0.05 percent of Si, 0.1 to 0.2 percent of V, 0.0 to 2.5 percent of Co, 0.1 to 0.2 percent of Al, 0.001 to 0.01 percent of B and Clt, 0.005%, Plt; 0.005%, Slt; 0.002%, Olt; 0.002%, Nlt; 0.002%, and the balance being nickel. On the basis of the Ni-Cr-Mo alloy, the composition design thought of increasing W and reducing Mo is adopted, the optimized hot working and heat treatment process is matched, and finally the strength of a base body is improved through cold deformation; the content of C is controlled, precipitation of carbides is controlled, and alloy elements are ensured to be completely dissolved into a matrix during homogenization treatment; and a pure smelting process is adopted, so that the oxygen content in the alloy is reduced, the inclusion content is controlled, and high purity is ensured.

The invention discloses a self-adaptive anti-sticking cable and a preparation method and application thereof. The self-adaptive anti-sticking cable comprises a superconducting core wire, a self-adaptive anti-sticking layer, a self-repairing insulating layer and a multifunctional outer sheath which are sequentially arranged from inside to outside. According to the scheme, the problems of debonding, breakdown, energy consumption and failure of a traditional cable in an extreme environment are comprehensively solved through gradient piezoelectric-phase change synergistic dynamic stress compensation, vertical boron nitride insulation network directional blocking, thermoelectric-super-hydrophobic multifunctional outer sheath integration and an extreme environment adaptive self-repairing system.

The invention belongs to the technical field of superconducting wires, and relates to an aluminum slot wire WIC superconducting wire and a preparation method thereof. The invention provides a preparation method of an aluminum slot wire WIC superconducting wire, and the method comprises the steps: selecting a workpiece according to a preparation technology of the aluminum slot wire WIC superconducting wire, and the workpiece comprises an aluminum slot wire, a superconducting round wire and two rolls of soldering round wires; the superconducting round wire is arranged in the groove of the aluminum slot wire in a threading mode, then the two rolls of soldering tin round wires are symmetrically embedded into the groove between the aluminum slot wire and the superconducting round wire, and finally the aluminum slot wire WIC superconducting wire is obtained through induction heating and online tin melting. The method solves the technical problems that a conventional preparation method of the aluminum slot wire WIC superconducting wire is low in production efficiency, multiple in wire soldering tin filling unevenness defect, low in RRR value and the like.

The invention discloses a preparation method of a slot wire for a superconducting wire. The preparation method comprises the following steps: manufacturing a copper bar into a copper flat wire through a drawing process; soaking the copper flat wire in a soldering flux, and then washing and air-drying the copper flat wire to obtain a prefabricated copper flat wire; combining the plurality of prefabricated copper flat wires according to the cross section structure of the superconducting wire; performing induction heating welding on the plurality of combined prefabricated copper flat wires through a welding mold to obtain a copper groove wire; performing water cooling, cleaning and drying on the copper slot wire to obtain a copper slot wire with a clean surface; and screening the copper slot line through a laser diameter measuring instrument and eddy current flaw detection equipment to obtain a copper slot line finished product. The copper slot wire with the groove in the surface is obtained by welding the copper flat wire, integrated forming of the structural slot wire is achieved, the production efficiency is improved, welding and finishing forming are carried out by designing dies of different structures, the surface quality of the copper slot wire is improved, the slot wire of a high-precision complex structure is obtained, the drawing speed is high, and the production cost is low. And large-scale production of the copper slot line is facilitated.

The invention relates to a high-temperature superconducting cable and a manufacturing process thereof, and belongs to the technical field of electric wires and cables.The cable comprises a supporting framework, a buffer layer, a three-phase superconducting composite layer, a shielding layer, a heat insulation layer and a sheath layer which are sequentially arranged from inside to outside; the heat insulation layer comprises at least two layers of corrugated pipes formed by continuous rolling and welding, and the corrugated pipes are of periodic concave-convex structures obtained by conducting continuous rolling and side seam welding on metal strips to form closed pipe bodies and then conducting embossing treatment on the closed pipe bodies. A woven reinforcing layer wrapping the peripheries of the corrugated pipes is further arranged in the heat insulation layer, and the adjacent corrugated pipes are connected through supporting pieces to form a vacuum interlayer. According to the application, the corrugated pipe formed by continuous coiling and welding is combined with the combined structure of the braided reinforcing layer and the supporting piece, so that the continuous production of the large-length high-temperature superconducting cable can be conveniently realized, and the problems of axial stress concentration and seam accumulation defects existing in a heat insulating layer of a traditional prefabricated sleeve pipe can be eliminated; and the air tightness stability of the vacuum interlayer of the large-length high-temperature superconducting cable is ensured.

The invention provides a multiplexer and a detector. The multiplexer comprises a dielectric substrate, a connecting structure and a plurality of band-pass filters with different working frequencies. A conductive film layer is arranged on the plane of one side of the dielectric substrate and comprises a signal line and a grounding plate located on the side edge of the signal line. The connecting structure is arranged on the conductive film layer and comprises a main branch and a plurality of branches, and the main branch is connected with the branches and serves as an input port of the multiplexer. And the plurality of band-pass filters with different working frequencies are connected with the signal line and the grounding plate. Each band-pass filter comprises a first port and a second port, the first port is connected with the corresponding branch, and the second port serves as an output port of the multiplexer. The signal line, the grounding plate, the connecting structure and the band-pass filter can be located on the same side plane of the dielectric substrate, metal loss and radiation loss are reduced, and integration with other components of the detector is facilitated.

The invention discloses a preparation method of a Nb3Sn superconducting wire for a light-emitting device and the Nb3Sn superconducting wire, and relates to the technical field of superconducting, and the method comprises the following steps: depositing a rare earth element film on the surface of a SnTi alloy rod to obtain a first rare earth element alloy rod; a hole is drilled in the center of the first rare earth element alloy rod, a CuTa alloy rod is inserted, and a second rare earth element alloy rod is obtained; the second rare earth element alloy bar is inserted into the inner tin method Ni3Sn CuNb composite pipe, and an inner tin method Ni3Sn subcomponent is obtained; a plurality of inner tin method Ni3Sn subcomponent clusters are loaded into a Ta tube and an oxygen-free copper tube, and an inner tin method Ni3Sn final blank is obtained; and stretching the internal tin method Ni3Tin final blank to obtain the Ni3Tin superconducting wire. The rare earth element film is deposited on the surface of the SnTi alloy bar, the application range of the Nb3Sn superconducting wire is expanded, and due to the existence of the CuTa alloy bar, the tensile strength of the wire is stable after the heat treatment process, and wire damage caused by collision is prevented.

The invention belongs to the technical field of superconducting wires, and discloses a Ni3Sn superconducting wire with a stable RRR value and a preparation method of the Ni3Sn superconducting wire. An oxygen-free copper rod, a Ta sheet and a thin-wall oxygen-free copper sheath are prepared into a Cu / Ta / Cu composite tube, meanwhile, subcomponents are densely arranged and loaded into a Ta barrier layer, then the Ta barrier layer is loaded into the prepared Cu / Ta / Cu composite tube, a final Nb3Sn blank with a double-layer Ta structure is obtained, and the Nb3Sn superconducting wire is prepared through multiple times of stretching. According to the invention, a double-Ta barrier layer structure in the Nb3Sn superconducting wire is realized, and the risk that an original single Ta barrier layer structure is broken in a stretching process to cause diffusion of Sn to a copper stable layer and reduce the RRR value of the wire is reduced. Compared with a traditional single-layer Ta tube superconducting wire, the RRR value of the Nb3Sn superconducting wire prepared through the method is obviously increased, and the Nb3Sn superconducting wire is more stable.

The invention belongs to the technical field of superconducting wires, and relates to a niobium-tin composite superconducting wire and a preparation method thereof. The invention provides a Nb3Sn composite superconducting wire. The Nb3Sn composite superconducting wire sequentially comprises an Nb3Sn superconducting wire core, a barrier layer, a stable layer, a transition layer, a substrate layer and a functional layer from inside to outside, the transition layer is formed by mixing copper and a dielectric polymer, and the copper content is continuously decreased in a gradient manner from inside to outside; the substrate layer is the dielectric polymer; the functional layer is a plurality of protruding metal microstructures. According to the invention, the functional layer with the broadband electromagnetic stealth function is integrated on the basis of the Nb3Sn superconducting wire rod, so that the radar cross section is obviously reduced while the Nb3Sn superconducting wire rod bears high-density superconducting current and generates a strong magnetic field, and the technical problem that a high-field superconducting magnet system is easy to detect in an electromagnetic environment is solved.

The invention discloses a processing method for controlling the copper ratio of a superconducting wire, and relates to the technical field of superconducting wire processing, comprising the following steps: acquiring a superconducting wire to be processed; carrying out on-line copper ratio test to obtain a copper ratio change trend and a copper ratio fluctuation range; carrying out coreless lathe scaling according to the copper ratio change trend to obtain a superconducting wire to be processed with fluctuating size; finishing the to-be-processed superconducting wires with fluctuating sizes to a uniform size by using a mold; repeating the online copper ratio test, the coreless lathe peeling and the die finishing until the copper ratio fluctuation range meets the copper ratio fluctuation requirement, and obtaining a superconducting wire in a first fluctuation range; and processing the superconducting wire in the first fluctuation range to a designed copper ratio to obtain a final superconducting wire. On-line copper ratio testing is matched with centreless lathe scaling, so that the copper ratio fluctuation of the superconducting wire is reduced, and the copper ratio uniformity and the performance stability are improved; and non-uniform copper ratio areas at the head and the tail of the wire can be fully utilized, and the yield of the wire is improved.

The invention discloses a hot forming preparation method of a high-temperature superconducting MgB2 wire rod based on resistance heating. The method comprises the following steps: 1, carrying out cold rotary swaging deformation after tubing to obtain a single-core complex; 2, after resistance heating, carrying out hot drawing deformation to obtain a single-core composite round wire; thirdly, the single-core composite round wires are bundled and assembled and then subjected to cold rotary swaging, and a multi-core bundled and assembled complex is obtained; 4, after resistance heating, carrying out hot drawing deformation to obtain a multi-core clustered composite MgB2 round wire; and 5, carrying out vacuum heat treatment to obtain the high-temperature superconducting MgB2 wire rod. Resistance heating is carried out before hot drawing deformation, so that the center Mg rod and the middle Nb barrier layer obtain excellent thermoplasticity, coordinated and uniform plastic deformation of the center Mg rod and the middle Nb barrier layer and the outer Cu sheath and uniform flowing of filled powder are achieved, and the MgB2 superconducting wire which is free of knots on the surface, free of core breakage in the interior and uniform in deformation is obtained and is suitable for the field of high-temperature superconducting. And meanwhile, the machining pass is reduced, the machining time is greatly shortened, and the preparation process is simplified.

The invention belongs to the technical field of cable processing, and relates to a preparation method and application of a flexible superconducting coaxial cable outer conductor. The preparation method comprises the following steps: mixing Nb powder and Ti powder by adopting a vibrating ball mill to prepare NbTi composite powder; a substrate of laser powder bed melting equipment is preheated, the NbTi composite powder is spread on the substrate of the laser powder bed melting equipment, a melting powder layer is scanned through the laser powder bed melting technology, a three-dimensional communicated grid structure is formed through interlayer staggered scanning, finally, the NbTi net-shaped alloy pipe is placed in a strong acid solution to be soaked for a short time, redundant metal powder is removed, and the NbTi net-shaped alloy pipe is obtained. And finally, the preparation of the flexible superconducting coaxial cable outer conductor for the quantum computer is realized.

The invention relates to the technical field of electric wires and cables, and discloses an ultrahigh-conductivity electric wire and cable and a preparation method thereof. A graphene enhancement layer; a nano composite insulating material layer; an inner semi-conductive layer; a conductive copper strip shielding layer; a silver-plated copper wire woven mesh shielding layer; an intelligent monitoring and protection sheath; the method comprises the following steps: step S01, preparing a superconducting core wire strand; step S02, preparing a nano composite insulating material layer; s03, preparing a shielding layer; step S04, intelligent monitoring and protection sheath preparation; the superconducting core wire strand formed by twisting a plurality of YBCO superconducting material filaments forms a stable structure with excellent conductivity under the precise control of twisting process parameters, so that the resistance is effectively reduced, the loss in the electric energy transmission process is reduced, the electric energy transmission efficiency is improved, high-density current can be borne for stable transmission, and the service life of the cable is prolonged. And the requirement of the modern electrical engineering field on high conductivity of wires and cables is met.

The invention discloses a method for repairing a high-temperature superconducting tape. The method comprises the following steps: S1, placing a to-be-repaired area of the high-temperature superconducting tape in a reaction container; s2, the reaction container is kept at a certain oxygen partial pressure, and annealing treatment is conducted on the to-be-repaired area; s3, after annealing treatment is completed, the high-temperature superconducting tape is taken out after the reaction container is cooled; wherein the to-be-repaired area is a dead pixel area in the high-temperature superconducting tape and an area with a certain length on two sides of the dead pixel area in the length direction of the tape. According to the repairing method, cutting treatment is not needed, that is, the original strip does not need to be damaged basically, and the dead pixel area can be repaired only by conducting proper heat treatment on the dead pixel area.

The invention provides a method for preparing an iron-based superconducting material single crystal in a microgravity environment, and belongs to the field of superconducting materials. The method specifically comprises the following steps: carrying out a microgravity crystal growth experiment in a high-temperature experiment cabinet of a space station, putting a solid-phase sintered or pre-melted rod-like raw material into a furnace body, heating and melting, then slowly solidifying, and finally growing the iron-based superconducting material single crystal with large size and extremely low defect density.

Described is a high-temperature superconductor (HTS) cable, comprising a plurality of HTS tapes, wherein all or part of a cross-section of at least one of the HTS tapes are removed to reduce the current carrying capacity of the HTS tape. Also described is a method for shaping the current density of a high-temperature superconductor (HTS) cable, wherein the HTS current density is carried by HTS tapes, and wherein the method comprises selective mechanical removal of all or part of the cross section of one or more of HTS tapes.

To suppress reduction of an electrification performance (current value) in an end structure for a superconducting cable.SOLUTION: An end structure for a superconducting cable comprises at least a multilayer conductor 10 and an electrode part 30, and the multilayer conductor 10 is configured by laminating a plurality of superconducting wires 20, each presenting a tape shape, in a thickness direction of the superconducting wire 20. The electrode part 30 includes at least a plurality of slits 40. The multilayer conductor 10 is divided into a plurality of wire units 11, and stored in the slit 40 for each wire unit 11. When storing two superconducting wires 20 in the slit 40, it is preferable that directions of faces of the superconducting wires 20 are adjusted in such a manner that faces at the sides of a superconducting layer 23 and a stabilizing layer 24 constituting the superconducting wire 20 is brought into contact with or made close to an inner wall surface of the slit 40.SELECTED DRAWING: Figure 1

The invention relates to the technical field of cable preparation, in particular to a preparation method of a cable for a quantum computer, which comprises the following steps: drawing a niobium-titanium alloy wire; extruding polytetrafluoroethylene to coat the outer surface of the niobium-titanium alloy wire to obtain an inner conductor with an insulating layer; performing niobium electroplating on the inner wall of the stainless steel tube to obtain a target cable; when it is judged that niobium plating of the outer conductor base material does not meet the preset standard according to the niobium plating uniformity characteristic value, the current density is reduced; penetrating the inner conductor with the insulating layer into a stainless steel tube meeting a preset standard, drawing the stainless steel tube to obtain a target cable, and secondarily judging whether the preparation of the target cable meets the preset standard or not when judging that the preparation of the target cable does not meet the preset standard according to the contact resistance evaluation value; determining a corresponding adjustment strategy according to the niobium-plated layer cracking characteristic value; and the target cable meeting the preset standard is wound and packaged, so that the preparation efficiency of the cable is improved.

The embodiment of the invention provides a temperature monitoring optical cable and a cable assembly, and belongs to the field of optical cables. The temperature monitoring optical cable comprises a heating cable body, a heat transfer layer, at least one pressure sensing unit, a heat preservation buffer layer and a temperature sensing layer. The heat transfer layer covers the heating cable body so as to transfer heat of the heating cable body; the pressure sensing unit is arranged on the outer side of the heat transfer layer and extends in the length direction of the heating cable body; the temperature sensing layer wraps the pressure sensing unit, the temperature sensing layer is configured to apply pressure to one side of the pressure sensing unit according to temperature change, the pressure sensing unit generates a strain signal when being subjected to pressure so as to feed back the temperature of the temperature sensing layer, and the heat preservation buffer layer is used for preventing heat of the heating cable body from being transmitted to the temperature sensing layer. According to the temperature monitoring optical cable provided by the embodiment of the invention, the temperature of the environment where the superconducting cable of the cable assembly is located can be continuously monitored, and the working temperature monitoring precision of the superconducting cable is improved.

The embodiment of the invention discloses a preparation method of a europium-barium-copper oxide superconducting sputtering target material, which comprises the following steps: mixing europium oxide powder, barium carbonate powder and barium oxide powder according to a set proportion, and then mixing with a dispersing agent and water to obtain first europium-barium-copper oxide slurry; carrying out spray granulation on the first europium-barium-copper oxide slurry to obtain first mixed powder; calcining the first mixed powder, and mixing the calcined first mixed powder with a dispersant, a binder and water to obtain second europium barium copper oxide slurry; performing spray granulation on the second europium-barium-copper oxide slurry to obtain second mixed powder; carrying out compression molding-cold isostatic pressing on the second mixed powder to obtain a europium-barium-copper oxide target material biscuit; wherein the mold pressing pressure ranges from 3 MPa to 6 MPa, and the cold isostatic pressing pressure ranges from 100 MPa to 250 MPa; the europium-barium-copper oxide target material biscuit is subjected to degreasing and sintering integrated treatment, and the europium-barium-copper oxide superconducting sputtering target material is obtained; the relative density of the europium barium copper oxide superconducting sputtering target material is as high as 97.98%, and the bulk resistivity is as low as 1.98 m omega.cm.

Provided herein are methods and systems used with a repairable stellarator, including maintaining magnetic coils, such as HTS tape coils, and allowing for deconstruction and reconstruction of one or more components of the repairable stellarator. Further provided herein are methods and systems for a stellarator system which integrates a modular sacrificial coil set.

The invention discloses a preparation method of a multi-core Nb3Sn composite wire and the composite wire. The method comprises the following steps: loading an Nb rod into an oxygen-free copper pipe to obtain a CuNb single-core rod; the CuNb single-core rods and the hexagonal copper core rods are sequentially arranged in a CuMn alloy pipe at intervals to obtain a multi-core CuNb composite sheath, and then the multi-core CuNb composite sheath is machined into a CuNb composite rod; the CuNb composite rod is machined into a CuNb composite pipe; the SnTi alloy bar is loaded into the CuNb composite tube to obtain a sub-component; a hexagonal CuMn subcomponent is obtained through machining; the hexagonal CuMn subcomponent and the SnCu alloy bar are assembled into a Ta tube and then integrally assembled into an oxygen-free copper tube to obtain a composite wire, and the composite wire is processed to obtain the Nb3Sn superconducting wire. CuNb single core rods on the outermost layer are adjusted to be in discontinuous close arrangement, the problem that machining cracking is prone to occurring in the subcomponent preparation stage due to the fact that Cu on the outer portions of the single core rods is little is solved, the deformation consistency of the wire in the composite wire machining stage is further enhanced by using the CuMn alloy on the outer portions of the subcomponents, it is also guaranteed that the wire cannot crack when stretched, and the service life of the wire is prolonged. The fan-shaped SnCu alloy bars are additionally arranged, so that sufficient Sn is ensured when the wire Nb generates Nb3Sn.

The invention discloses a dynamic load adjustment-liquid nitrogen cold storage integrated high-temperature superconducting power grid capacity expansion system and method. The system comprises a data preprocessing system, a dynamic load adjustment device, a liquid nitrogen cold storage device, a state monitoring device, a high-temperature superconducting cable capacity expansion device and a communication coordination system. The method comprises the steps of generating a standardized feature matrix through normalization processing; multi-time-scale load prediction is realized through an LSTM (Long Short-Term Memory) network, a collaborative instruction set is generated by adopting an optimal scheduling engine of mixed integer linear programming, and adaptive closed-loop control based on a fuzzy PID (Proportion Integration Differentiation) algorithm is realized; a multi-physics field coupling optimization model of a real-time cold energy distribution diagram is adopted to realize power grid capacity improvement; and the time sequence consistency of the whole system is coordinated and circulation is formed. Zero-resistance power transmission is realized in a liquid nitrogen temperature region by adopting the high-temperature superconducting cable, the loss is reduced to 0.5% or below, and the transmission capacity is improved by 3-5 times; the load demand is predicted in combination with the AI algorithm, and the renewable energy consumption rate is increased to 95%.

The invention belongs to the technical field of superconducting wires, and discloses a multichannel NbTi superconducting coaxial cable and a preparation method thereof. The method comprises the following steps: introducing an Hf element into NbTi alloy powder to prepare an NbTi wire doped with the Hf element, respectively preparing an NbTi flat rectangular shell and a hole-containing insulating block, assembling the NbTi flat rectangular shell and the hole-containing insulating block, and inserting the NbTi wire into the hole of the insulating block to prepare the multi-channel NbTi superconducting coaxial cable. Through verification, the multi-channel NbTi superconducting coaxial cable can transmit a plurality of high-strength quantum bit signals at the same time, and is excellent in performance.

The present invention relates to the technical field of superconducting materials. Disclosed are a MgB2 superconducting wire and a preparation method therefor. The preparation method comprises: melting Mg, Cu and Ti to obtain a Mg alloy ingot, processing the Mg alloy ingot to obtain a Mg alloy rod, loading the Mg alloy rod and B powder into a Nb tube to obtain a composite rod, processing the composite rod to obtain a single-core wire, loading the single-core wire into an oxygen-free copper tube, then loading into a monel tube in a densely-packed manner, and performing cold-forming treatment to obtain a multi-core composite wire; and performing high-temperature phase-forming heat treatment on the multi-core composite wire to prepare the MgB2 superconducting wire. In the present application, the Mg alloy rod containing Cu and Ti metal elements is used as a Mg source for preparing a MgB2 multi-core wire, so as to improve the plastic deformation ability of the Mg alloy rod in the wire treatment processes, and improve the grain boundary coupling, thereby improving the current carrying performance of the MgB2 superconducting wire.

A method for preparing a thin-walled composite pipe is provided, in which an AlN particle / zinc-aluminum 27 (AlNp / ZA27) composite billet is subjected to multi-pass reciprocating extrusion at 250-350° C., and then loaded into a pipe extrusion die. The composite billet is heated with the temperature being in an ascending gradient distribution (within a range of 250-350° C.) along an extrusion direction from the billet to an outlet of the die, then kept a preset temperature for a period of time, and finally extruded at a rate of 0.1-0.5 mm / s to obtain the thin-walled composite pipe. A thin-walled composite pipe prepared by this method is also provided, including an AlN particle and a ZA27 alloy.

The present invention relates to the technical field of cable manufacturing, and in particular to a superconducting coaxial cable for quantum computers and a manufacturing method thereof, the method comprising: coating an inner insulating layer on the outer side of an inner conductor to form an inner conductor layer, electroplating a niobium coating layer on the inner wall of a stainless steel tube to form an outer conductor; forming a cable conductive layer; obtaining a single inner conductor layer travel speed change curve; determining a first speed mutation type and a second speed mutation type; determining the up and down stirring rate of an electroplating stirring rod at the outer conductor position; electroplating the inner wall of the stainless steel tube; determining an inner conductor movement adjustment mode according to the degree of friction between the inner conductor layer and the outer conductor, including adjusting the moving speed of the inner conductor layer in the outer conductor, or determining the initial rotation rate of the inner conductor layer when the outer conductor starts to pull the wire; pulling the outer conductor after sleeve connection to form a cable. The present invention achieves an increase in the stability of cable assembly.

The invention belongs to the technical field of superconducting wires, and relates to a connecting structure and a connecting method of superconducting tapes and a connecting superconducting wire. The invention relates to a connecting structure of REBCO superconducting tapes. The connecting structure comprises a first REBCO superconducting tape and a second REBCO superconducting tape, the to-be-connected areas of the first REBCO superconducting tape and the second REBCO superconducting tape are in a step shape, and the splicing angle of the to-be-connected areas is an acute angle. When the REBCO superconducting tape is connected through the connecting structure of the REBCO superconducting tape, the electrical transport performance of the connector is not affected by an intrinsic weak connecting structure of the REBCO layer in the vertical direction, pressure does not need to be applied, and the connecting process is conducted in an open environment.

The invention relates to the field of superconducting wire forming methods, in particular to a Nb3Sn superconducting wire preparation method based on multi-core wire liquid nitrogen cold drawing, and the Nb3Sn superconducting wire preparation method based on multi-core wire liquid nitrogen cold drawing comprises the following steps: preparing ultrahigh-tin-content copper-tin alloy powder by adopting a gas atomization method; the oxygen-free copper pipe, the oxygen-free copper rod and the pure niobium rod are machined, and the oxygen-free copper pipe and an oxygen-free copper bolt plug are obtained; acid pickling, cleaning and drying are carried out; uniformly fixing the pure niobium rods in the oxygen-free copper pipe to form a combined blank; performing rotary swaging to a required size, and then continuously drawing to obtain a finished wire; carrying out pulse treatment, and then carrying out air cooling to room temperature; and finally obtaining the Nb3Sn superconducting wire. According to the method, the strength and plasticity of the oxygen-free copper pipe sheath are improved through a liquid nitrogen cold drawing method, the combined blank is subjected to subzero treatment in the rotary swaging and drawing process, the plasticity of the combined blank is improved, and the high-strength and high-plasticity Ni3Sn superconducting wire can be obtained.