597results about "Superconductor elements usage" patented technology

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 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 discloses a copper plating method for a superconducting strip. The method comprises the following steps: S1, carrying out initial electrochemical copper plating on a processed strip; s2, high-precision continuous thickness measuring equipment is adopted to test the thickness of the plating layer in the length direction and the width direction of the strip; s3, compensating the thickness error by adjusting the position of the shielding plate according to the thickness distribution data obtained by testing; and S4, the steps S2-S3 are repeated until the plating layer is accumulated to reach the target thickness. The thicknesses of the copper plating layers on the two sides of the superconducting tape are adjusted by adjusting the shielding plates, non-contact detection and dynamic adjustment of the thickness of the plating layer are achieved, and the precision of the thickness of the plating layer is improved.

The invention discloses a superconducting wire performance testing device which is characterized by comprising a sample rod, a conductor critical current testing framework, a conductor mechanical performance testing framework and a Dewar. During performance testing, the sample rod and the conductor critical current testing framework are detachably connected and located in the Dewar; or the sample rod and the conductor mechanical property testing framework are detachably connected and located in the Dewar. The testing device provided by the invention can be used for both critical current testing and mechanical performance testing.

The invention belongs to the technical field of superconducting material processing, and discloses a multi-barrier-layer MgB2 superconducting wire and a preparation method thereof. A plurality of groups of interlayers of the wire are composed of Cu / Ni / Nb, outer-layer copper serves as a stabilizer, Ni serves as a low-cost outer barrier layer, Ni and the outer-layer copper are mutually diffused in the hot extrusion process to form a stable Cu-Ni compound, and Nb foil is added into the Ni layer to serve as an inner barrier layer so as to restrain the diffusion problem of a small amount of Ni-Mg. According to the multi-barrier-layer MgB2 superconducting wire, Nb is greatly replaced by Cu / Ni, the raw material cost is remarkably reduced, the barrier layers are mutually diffused in the hot extrusion process to achieve metallurgical bonding, uniform deformation of the wire in the subsequent machining process is facilitated, the possibility of damage of the barrier layers is reduced, the current-carrying performance of the wire is improved, the Jc of the multi-barrier-layer MgB2 superconducting wire under 4.2 K and 3T is 5199-6271 A / mm < 2 >, and the service life of the multi-barrier-layer MgB2 superconducting wire is prolonged. And the current-carrying performance is obviously improved, and the application prospect is wide.

A multi-objective optimization method for structural parameters of a superconducting cable, comprising steps of: S1, obtaining structural parameters and performance parameters of the superconducting cable, setting a constraint range of the structural parameters of the superconducting cable, based on the structural parameters and performance parameters of the superconducting cable, constructing an objective function, to establish a multi-objective optimization model of the structural parameters of the superconducting cable; and S2, through an improved multi-objective grey wolf optimization algorithm, iteratively solving the multi-objective optimization model of the structural parameters of the superconducting cable, to obtain an optimal solution for each of the structural parameters of the superconducting cable; where, to an iteration coefficient in a multi-objective grey wolf optimization algorithm, a weight coefficient negatively correlated with an overall sensitivity index of each of the structural parameters of the superconducting cable is given, to obtain the improved multi-objective grey wolf optimization algorithm.

An on-line program control excitation power supply with quench protection for a high-temperature superconducting magnet comprises a single-chip microcomputer for receiving control data, outputting control voltage through digital-to-analog conversion (DAC) of the single-chip microcomputer, and magnetizing a magnet coil through current stepping; a sampling signal is output to the liquid crystal screen to display corresponding voltage and current values in real time after being processed by the single-chip microcomputer analog-to-digital conversion ADC; voltage signals at the two ends of the magnet coil are sampled and returned to the single-chip microcomputer to be processed, when high voltage occurs, it is judged that the voltage signals are abnormal voltage signals, quench protection is carried out, the single-chip microcomputer outputs control signals to cut off connection between the magnet coil and the excitation power source, and residual energy of the magnet coil is released through the high-power thyristor. The provided excitation power supply has the characteristics of high power, high stability, good repeatability and good linearity; performing numerical control stepping output, gradually applying current to the superconducting coil, and slowly establishing a magnetic field; effective quench protection is achieved, and it is guaranteed that a magnet coil is not damaged by quench.

The invention belongs to the technical field of superconductive phase modifier stators, and relates to a power grid direct connection type ultrahigh voltage superconductive phase modifier stator cable winding fixing method, which is characterized in that a cable is fixed in a groove in segmented non-magnetic teeth, and the end part of the cable is bound and fixed; and the problem of local deformation of the cable winding caused by end electromagnetic stress and vibration can be avoided.

The present invention provides: a MgB2 superconducting wire that has a barrier layer of highly uniform thickness covering a MgB2 core and that reduces MgB2 filament defects and is suitable for thinning and lengthening; a MgB2 superconducting wire manufacturing method for manufacturing the same; a superconducting coil using the same; and a magnetic generator including the superconducting coil. A MgB2 superconducting wire (200) comprises: a core material (210); a MgB2 filament (220) in which a MgB2 core (221) is covered with a barrier layer (222); and a metal sheath (230). The MgB2 filament (220) has a barrier layer (222) thickness on the outer peripheral side of the wire not more than three times the barrier layer (222) thickness on the core side of the wire. The method for manufacturing the MgB2 superconducting wire includes a step for forming a single core wire, a step for forming an embedded material, a surface reduction processing step, and a heat treatment step. The embedded material is formed by arranging the single core wire in a recess formed in the outer surface of the core material or by incorporating a spacer in a gap.

The invention belongs to the technical field of superconducting materials, and discloses an internal tin method Nb3Sn superconducting wire integrated with a piezoelectric sensing function and a preparation method of the internal tin method Nb3Sn superconducting wire. According to the method, a piezoelectric functional layer and a dielectric layer are prepared on the surface of a SnAl alloy rod, a CuAg alloy rod is installed after drilling to form a composite rod, the composite rod is inserted into an inner tin method Nb3Sn / CuNb composite pipe to be drawn into a subcomponent, then the subcomponent is bundled and installed into a Ta pipe and an oxygen-free copper pipe, and the wire is prepared through multiple times of stretching. The piezoelectric functional layer can convert micro strain into measurable electric signals, in-situ real-time monitoring of mechanical stress and the like in the wire rod is achieved, the CuAg alloy bar can stabilize the tensile strength of the wire rod and promote generation of an Nb3Sn phase, and on the premise that the superconducting performance is not affected, the operation reliability and safety of the high-field magnet under the extreme working condition are improved.

The invention belongs to the technical field of superconducting coaxial cable processing, and particularly relates to a superconducting coaxial cable and a preparation method and application thereof. The superconducting coaxial cable is composed of an outer conductor, a PTFE insulation module and an inner conductor arranged in the PTFE insulation module, the PTFE insulation module is a cylinder with a through hole in the center, supporting structures are symmetrically arranged at the two axial ends of the cylinder, a non-supporting structure is arranged in the middle of the cylinder, and the specific structure of the PTFE insulation module effectively regulates and controls the effective dielectric constant of an insulator. Therefore, the characteristic impedance of the superconducting coaxial cable is flexibly and finely adjusted, and the application requirement of a quantum computer signal transmission device on the characteristic impedance is met. The PTFE insulating module is prepared by pressing and sintering, and NbTi filaments are embedded into the prepared PTFE module by a heating method and are assembled with an outer conductor to form the superconductive coaxial cable. The method is simple in process, convenient to assemble and suitable for large-scale production.

The invention discloses a ductile niobium-titanium alloy material, a preparation method and application of the ductile niobium-titanium alloy material to preparation of a central conductor. The ductile niobium-titanium alloy material comprises, by weight, 44.5%-47.5% of Nb, 47.0%-50.0% of Ti, 1.0%-2.0% of Zr, 0.8%-2.0% of Mo, 0.2%-0.6% of V, 0.1%-0.3% of Al, 0.05%-0.12% of Si, 0.015%-0.025% of C, smaller than or equal to 0.035% of O, smaller than or equal to 0.01% of N, smaller than or equal to 0.25% of Fe + impurities and the balance Ti. The preparation process comprises the steps of double-vacuum melting, double-stage pre-homogenization heat treatment, gradient temperature control thermal machining and double-stage aging heat treatment, a fine grain beta matrix + dispersed alpha phase + nano MC carbide synergistic strengthening structure is obtained, and 3-10% of metastable beta phase is reserved. The central conductor made of the material has longitudinal and transverse absorption energy of not less than 180 J / cm and not less than 178 J / cm at-273 DEG C, longitudinal and transverse performance difference of not more than 8%, yield strength of not less than 780 MPa, salt spray corrosion resistance of not less than 1000 hours, and no obvious corrosion, and is suitable for manufacturing the central conductor of the low-temperature superconducting wire.

The invention discloses a vertical sintering method for improving EuBCO high-temperature superconducting target material component uniformity, and belongs to the field of superconducting target material preparation. The cylindrical EuBCO target blank is vertically fixed to the center of an alumina crucible, the axis of the cylindrical EuBCO target blank is made to be perpendicular to the bottom face of the crucible, and sintering is conducted in the oxygen atmosphere at the temperature of 900-950 DEG C. Traditional surface contact is replaced by point / line contact, the contact area is reduced by more than or equal to 80%, and the gas diffusion retardation effect of the contact surface is eliminated; meanwhile, oxygen permeation and CO2 diffusion are enhanced through the exposed side faces, and generation of impure phases such as BaCO3 and BaCuO2 is inhibited. The XRD contact ratio of the two end faces of the sintered target material is larger than 99%, and the problem of composition segregation caused by traditional horizontal sintering is solved. The method does not need a crucible coating or an isolating layer, and is low in cost and free of secondary pollution.

Systems and methods disclosed herein may comprise a bottom hole assembly; and a cable disposed in the wellbore. In examples, the cable may comprise a superconducting material configured to provide at least power to the bottom hole assembly; one or more liquid supply channels configured to supply a fluid to reduce temperature of the superconducting material; and one or more liquid return channels. Further, cryogenic liquid may be pumped through the liquid supply channels.

The application discloses a superconducting synchronous phase modifier excitation power supply device, which comprises a three-phase rectifying device, an adjusting module, a protection module and a digital control module, wherein the three-phase rectifying device is used for providing a bus side DC voltage; the adjusting module is used for adjusting an excitation total current; the protection module is used for ensuring safe operation of the device; and the digital control module is used for realizing high-precision continuous adjustment of excitation winding voltage and current. The superconducting synchronous phase modifier excitation power supply device solves the problem of unbalanced reactive output of the superconducting synchronous phase modifier caused by large excitation current ripple, and improves the reliability of the superconducting synchronous phase modifier.

The utility model relates to the technical field of nuclear fusion, and discloses an uninsulated superconducting coil which comprises a coil framework. The superconducting tape is wound on the coil framework to form a multi-turn superconducting tape winding; the metal strip is wound between turns of the superconducting strip; and a welding layer formed by a metal solder is filled between the metal belt and the superconducting belt material. The turn-to-turn resistance of the superconducting tape in the uninsulated superconducting coil can be increased through parallel winding of the metal tape and the superconducting tape, so that the time constant of the uninsulated superconducting coil in the charging and discharging process is reduced, meanwhile, a gap between the metal tape and the superconducting tape is filled with welding flux, and the metal tape and the superconducting tape are welded together through a formed welding layer. The interturn combining capacity of the non-insulation superconducting coil is enhanced, the mechanical stability of the non-insulation superconducting coil is enhanced, meanwhile, the heat capacity of the non-insulation superconducting coil can be increased and a cold conduction channel can be increased by winding and welding a metal belt between turns in parallel, so that the cold conduction effect is enhanced, and the overall performance of the non-insulation superconducting coil is improved.

The application discloses a superconducting joint hot-pressing device, relates to the technical field of high-temperature superconducting joint preparation, and mainly comprises an upper pressing block, a lower pressing block and a heating piece, the upper pressing block is used for connecting the upper end of a hot-pressing machine body, the lower pressing block is used for connecting the lower end of the hot-pressing machine body, the upper pressing block and the lower pressing block are arranged in alignment in the up-down direction and are used for pressing superconducting tapes, and the heating piece is covered on the outer side of the upper pressing block and the lower pressing block along the circumferential direction of the upper pressing block and the lower pressing block. The application further discloses a hot-pressing machine which comprises a hot-pressing machine body and the superconducting joint hot-pressing device, the upper end of the hot-pressing machine body is a pressing mechanism which can exert pressure on the upper pressing block, and the lower end of the hot-pressing machine body is a fixing mechanism which can fix the lower pressing block. The application can realize uniform heating and improve the connecting effect of the superconducting tapes.

This invention discloses an acid cleaning fixture for a 166MHz quarter-wavelength superconducting cavity. The acid cleaning fixture comprises a large-tube side fixture, a small-tube side combined fixture, and an acid flow guiding fixture. The large-tube side fixture serves as the acid inlet or outlet of the superconducting cavity system. One end of the fixture is sealed to the large-tube flange of the superconducting cavity system, and the other end is connected to the acid cleaning equipment via a first connecting flange and a connecting pipe. The small-tube side combined fixture also serves as the acid inlet or outlet of the superconducting cavity system. One end of the fixture is sealed to the small-tube flange, the coupler flange, and the flanges of each rinsing port of the superconducting cavity system. The other end is connected to the acid cleaning equipment via a second connecting flange and a pipeline. The acid flow guiding fixture is located inside the superconducting cavity system and communicates with the large-tube side fixture. It guides the flow of acid entering the superconducting cavity system through the large-tube side fixture and balances the acid flow rate. This invention significantly improves the acid cleaning effect of the superconducting cavity and ensures smooth bubble removal.

The invention relates to the technical field of high-temperature superconducting magnets, in particular to a control method for curing of a high-temperature superconducting magnet, and the method comprises the steps: judging whether the high-temperature superconducting magnet is clean or not according to curing environment data; when the judgment result is that the curing environment belongs to the clean state, obtaining preheating processing data of the high-temperature superconducting magnet and preheating the high-temperature superconducting magnet according to the preheating processing data of the high-temperature superconducting magnet; and after preheating is finished, curing processing data of the high-temperature superconducting magnet are obtained, and the high-temperature superconducting magnet is cured according to the curing processing data. In the preheating and curing process, automatic adjustment and control are carried out, it is guaranteed that the curing process of the magnet is carried out under the optimal condition, and the high-temperature superconducting magnet with excellent performance can be obtained easily.

The invention belongs to the technical field of superconducting material processing, and discloses a near-infrared optical response Nb3Sn superconducting wire and a preparation method thereof. The Nb3Sn superconducting wire with near-infrared optical response comprises an optical functional coating, the optical functional coating is formed by embedding periodically-arranged plasmon metal micro-nano structures into a high-transparency dielectric substrate, the plasmon metal micro-nano structures are gold nanorod arrays or silver nanoring, the dielectric substrate is made of a SiO2-polyimide composite material, and the thickness of the dielectric substrate is 10-20 micrometers. The Nb3Sn superconducting wire with the near-infrared optical response has high absorptivity and photoelectric response in the near-infrared band, in-situ optical sensing of temperature, stress and magnetic field intensity can be synchronously achieved, the interface compatibility of the optical functional coating and the Nb3Sn superconducting basic wire is good, meanwhile, the influence of the added optical functional coating on the performance of the superconducting wire is small, and the service life of the superconducting wire is prolonged. And the method has a wide application prospect in the aspect of constructing an integrated optical-electric-magnetic multifunctional device.

The invention provides an intelligent evacuation temperature control system for a superconducting cable. The intelligent evacuation temperature control system comprises a vacuum sensing capacitor, a control module, a vacuum pump and a vacuum cavity, the vacuum sensing capacitor comprises an insulating tube, a liquid capacitor electrode, an out-tube capacitor electrode and an atmosphere communication type liquid capacitor electrode container, the insulating tube is vertically and fixedly connected with the atmosphere communication type liquid capacitor electrode container in an invading mode, the bottom end of the insulating tube is not in contact with the bottom of the atmosphere communication type liquid capacitor electrode container, and a vacuum cavity connecting port is formed in the top end of the insulating tube. The liquid capacitance electrode is accommodated in the atmosphere communication type liquid capacitance electrode container and the insulating tube; the control module is electrically connected with the liquid capacitance electrode, the tube external capacitance electrode and the vacuum pump and is used for starting the vacuum sensing capacitor, obtaining a capacitance signal of the vacuum sensing capacitor and controlling the vacuum pump according to the capacitance signal, a preset temperature and a preset characteristic curve; the vacuum cavity is in airtight connection with the vacuum cavity connector and the vacuum pump and used for placing cables. The temperature control precision and the response speed can be improved, and the temperature of the superconducting cable system is controlled to be stable.

A superconducting coil has a superconducting wire (3), an insulating sheet (4), and an adhesive resin (5). The insulating sheet (4) includes a plurality of resin sheets and two sheets of semi-cured resin fiber sheet (7). The plurality of resin sheets have electrical insulation and are laminated with at least two or more layers. The two sheets of semi-cured resin fiber sheet (7) are laminated in a manner that the plurality of resin sheets are sandwiched between each other. In the plurality of resin sheets and the two sheets of semi-cured resin fiber sheet (7), the resin sheets and the semi-cured resin fiber sheet (7) that are adjacent to each other are engaged with each other.

The invention discloses a high-temperature superconducting cable equivalent analysis method, a high-temperature superconducting cable equivalent analysis system, a medium and electronic equipment, and relates to the technical field of power devices and superconducting power transmission. Constructing a first equivalent circuit model based on the structural characteristic parameter set, and performing cross generality screening on the material parameters by adopting a multi-factor influence separation method to obtain a first equivalent parameter set; constructing a first coupling model based on the first equivalent parameter set, and applying disturbance signals of different frequencies to perform fault simulation to obtain a working condition equivalent model; extracting transient response data based on the working condition equivalent model, and identifying transient quenching response characteristics of the high-temperature superconducting cable based on the transient response data; according to the method, a multi-objective optimization function is constructed based on transient quench response characteristics, control parameters are optimized by adopting an NSGA-III algorithm, an optimal control strategy is obtained, and the problems of high quench expansion risk and difficulty in timely regulation and control of the high-temperature superconducting cable under a transient fault are solved.

This invention discloses a low-loss superconducting transformer device, comprising an internal transformer unit with a coil inside, and including a cooling mechanism, a ventilation mechanism, and an alarm mechanism. The cooling mechanism is used to reduce the temperature of the internal transformer unit and is located outside the internal transformer unit. The ventilation mechanism is used to ventilate the cooling mechanism and is located on top of the cooling mechanism. Activating the cooling mechanism lowers the temperature inside the internal transformer unit, allowing the superconducting material used in the internal transformer unit to operate normally, thereby reducing energy loss. The ventilation mechanism ensures sufficient air inside the alarm mechanism. When the cooling mechanism malfunctions, liquid nitrogen leaks, liquefying the surrounding air. The resulting water activates the alarm mechanism, alerting personnel to the leak.

The present disclosure relates to a cyclotron, a radiation therapy apparatus, an adjustment unit, an adjustment device of a superconducting coil, and an adjustment method thereof. The adjustment unit includes a rotating shaft, a drive assembly, a transmission assembly, and a detection element. The rotating shaft is capable of rotating driven by an external drive unit; the drive assembly includes an actuator and a tension assembly, the actuator being configured to drive the tension assembly to move linearly through rotation, and one end of the tension assembly being connected to a superconducting coil and capable of driving the superconducting coil to move; the transmission assembly is connected to the rotating shaft and the actuator, respectively, and configured to transmit power to the actuator; and the detection element is connected to the actuator and configured to monitor a displacement of the tension assembly and a displacement of the superconducting coil.

The invention relates to the technical field of superconducting cables, in particular to a three-dimensional heat-flow decoupling modeling method and device for a three-phase three-axis high-temperature superconducting cable, and the method comprises the steps: constructing a simplified three-phase three-axis high-temperature superconducting cable geometric model; constructing a temperature distribution finite element model, wherein the temperature distribution finite element model comprises a decoupled fluid model and a heat transfer model; the dynamic temperature distribution of the three-phase three-axis high-temperature superconducting cable under the influence of transient factors is solved by using a temperature distribution finite element model, and the method comprises the following steps: 1) a steady state step: based on an initial boundary condition, completing basic solution of a cable temperature field and a liquid nitrogen flow velocity field under a steady state through coupling calculation of a fluid module and a heat transfer module; 2) a transient step: taking a result value of steady-state solution as an initial condition of transient solution, and finally outputting a temperature distribution simulation result through multi-step transient solution iteration and flow field and temperature field distribution.Compared with the prior art, the method has the advantages of high modeling precision, small calculation amount, fast convergence and the like.

This invention belongs to the field of superconducting material processing technology and discloses a multi-barrier layer MgB2 superconducting wire and its preparation method. The wire consists of multiple barrier layers composed of Cu / Ni / Nb, with an outer copper layer as a stabilizer and Ni as a low-cost outer barrier layer. Ni and the outer copper layer diffuse into each other during hot extrusion to form a stable Cu-Ni compound. Nb foil is added within the Ni layer as an inner barrier layer to suppress the diffusion of small amounts of Ni-Mg. The multi-barrier layer of this invention significantly replaces Nb with Cu / Ni, substantially reducing raw material costs. The interdiffusion of the barrier layers during hot extrusion achieves metallurgical bonding, which is beneficial for uniform wire deformation during subsequent processing, reduces the possibility of barrier layer damage, and improves the wire's current-carrying capacity. The multi-barrier layer MgB2 superconducting wire of this invention exhibits a Jc of 5199~6271 A / mm² at 4.2K and 3T. 2 Its current-carrying capacity is significantly improved, and it has broad application prospects.

The application discloses a method for improving critical current of REBCO superconducting layer and relates to the technical field of superconducting materials.The method for improving critical current of REBCO superconducting layer comprises the following steps: REBCO superconducting tapes are annealed in a pure oxygen atmosphere, quenched to 20-25 DEG C, and then the surface silver layer is removed by a chemical method, after which the REBCO superconducting tapes are annealed in a mixed atmosphere of ozone and oxygen, and a protective layer is deposited, so that the critical current of the REBCO superconducting layer is finally improved.The carrier concentration of the REBCO superconducting tapes can be effectively controlled through the specific multi-step oxidation process, so that the REBCO superconducting tapes break through the under-doped state commonly existing in the prior art, reach the over-doped level, and then the critical current performance of the tapes is significantly improved.The method has simple process, high stability and high industrial feasibility, and can meet the demand of higher current-carrying capacity of REBCO tapes in key fields such as power transmission and high-field magnets.

The invention provides a superconducting magnet self-cleaning dipping device and dipping method, and relates to the technical field of superconducting magnet dipping treatment, the superconducting magnet self-cleaning dipping device comprises a dipping cylinder, a glue inlet container, a filling bag, a mixing cylinder, a stirring paddle, a communicating pipe, a vacuum pump, a pump body, a filter screen, a spray header, an infrared heating device, various windows and other parts, and corresponding dipping operation processes. The filling bags are arranged in the filling gaps, all the components are connected through the communicating pipes to form a circulating system, a circulating impurity removal mode is adopted, and measures such as window observation, infrared heating, stirring and mixing, double filtration and vacuum breaking of a vacuum pump are matched; the effects of reducing the usage amount of epoxy resin and the subsequent cleaning workload, efficiently removing impurities and bubbles in the superconducting magnet coil, accurately judging the impregnation quality and making the epoxy resin in the coil denser are achieved, meanwhile, it is guaranteed that the impregnation environment is clean, colloid is evenly and purely mixed, and finally the impregnation quality and the use performance of the superconducting magnet are improved.

The invention provides a multi-strip compact joint and a superconducting coil winding method. The multi-strip compact joint comprises a joint main body, a plurality of strips and a plurality of coils, a plurality of tree-shaped forked groove bodies are arranged on the end face of the connector body in the circumferential direction. The tree-shaped forked groove body comprises a single main groove and a plurality of branch grooves communicated with the main groove; the tree-shaped forked groove bodies extend from inside to outside in the radial direction of the end face of the connector body till the main grooves of the tree-shaped forked groove bodies form outlets in the outer circumferential face of the connector body. The tree-shaped forked groove body is used for containing and positioning a plurality of superconducting strips, and the superconducting strips are arranged in a layered mode, so that the welding area is increased. Layered connection of the strips is guided through the branch-type fractal tree-shaped topological slot structure, so that heating power is balanced during welding of the multiple layers of strips, the welding area and the electric contact quality are remarkably improved, the cold solder joint phenomenon is reduced, and the joint reliability and the superconducting stability are improved.