14 results about "Superconductivity" patented technology

The application discloses a high-temperature superconducting conductor and a preparation method thereof, and relates to the technical field of high-temperature superconductivity, wherein the conductor comprises an inner pipe body and an outer pipe body arranged coaxially, a liquid nitrogen convection cooling zone is formed in the inner pipe body, and a vacuum heat insulation cavity is formed between the inner pipe body and the outer pipe body. By forming the liquid nitrogen convection cooling zone in the inner pipe body and the vacuum heat insulation cavity between the inner pipe body and the outer pipe body, the liquid nitrogen can directly soak the superconducting cable for efficient heat exchange, the vacuum heat insulation cavity effectively blocks the radial conduction of environmental heat to the inner pipe body, and the heat load of the refrigeration system is greatly reduced; by electrically connecting the low-temperature end electrode and the superconducting cable and connecting the room-temperature end electrode and the low-temperature end electrode in series to form a loop, the room-temperature end electrode is avoided from directly contacting the superconducting cable, the axial heat leakage along the electrode is reduced, and one end of the liquid nitrogen cooling pipe is communicated with the inner pipe body and the other end of the liquid nitrogen cooling pipe extends to the outside through the outer pipe body, so that the stable supply and the sealing reliability of the liquid nitrogen are ensured.

The application provides a quench protection circuit, which is suitable for quench protection of a superconducting device. The quench protection circuit comprises: a diode branch, which is connected in parallel with a superconducting coil branch in the superconducting device, and comprises a plurality of forward diodes and at least one reverse diode; the plurality of forward diodes are connected in series and connected in parallel with the reverse diode; and the sum of voltage drops of the forward diodes is greater than or equal to an operating voltage between the superconducting coil branch; and a release branch, which is connected in parallel with the diode branch and the superconducting coil branch. The quench protection circuit can protect both insulated superconducting coils and uninsulated superconducting coils, and can be suitable for quench protection of different types of superconducting coils.

The present invention relates to a coil for a high temperature superconductor (HTS) magnet and, more particularly, to a coil for an HTS magnet for maintaining superconductivity, and a manufacturing method therefor. To this end, the coil for an HTS magnet for maintaining superconductivity is provided, the coil (50) for an HTS magnet being manufactured by winding an HTS wire rod (10) on a rotating bobbin (30), and comprising: a metal conductor (100) for covering, between an inner circumferential surface (70) and an outer circumferential surface (80) of the coil (50), a winding plane (60) of the coil (50); and a joining means for electrically connecting the metal conductor and the coil.

The invention discloses a vacuum heat pipe array and phase change energy storage coupled efficient heating system, and relates to the technical field of energy-saving heating, the vacuum heat pipe array and phase change energy storage coupled efficient heating system comprises a vacuum heat pipe array, a thermal switch cavity, a phase change energy storage unit and a control system, the condensation end of the vacuum heat pipe array is integrated on an upper cover plate of the thermal switch cavity, and the phase change energy storage unit is tightly attached to the lower surface of the cavity; the control system is connected with the thermal switch chamber; wherein the thermal switch chamber comprises a copper or aluminum alloy flat sealing cavity, gallium indium alloy particles or bismuth indium tin alloy particles and an electromagnetic coil, and can realize three modes of superconducting, modulation and turn-off by controlling the state of the alloy particles through a magnetic field under the instruction of a control system; the control system monitors the temperature of the heat pipe, the energy storage unit and the indoor temperature through a temperature sensor and generates an instruction, the system can further control a heating tail end circulating pump to release energy storage heat, the heat flow regulation and control and energy storage cooperation problem is efficiently solved, and the heating energy efficiency is improved.

The invention belongs to the related technical field of superconducting, and discloses an annular superconducting armature winding topological structure and a superconducting motor. The armature winding is a high-temperature superconducting coil, and the high-temperature superconducting coil is embedded into each stator groove in an annular winding structure. Compared with a conventional fractional slot concentrated winding, more winding phase distribution and slot potential distribution can be provided for the superconducting motor, and more design freedom degrees are achieved; the influence of the direction of a magnetic field acting on a winding strip on the performance reduction of the strip can be greatly reduced, and the performance bottleneck caused by high harmonic loss and low slot fullness rate of a traditional concentrated / distributed winding is greatly reduced; the technical problems of alternating current loss accumulation, poor superconducting state stability and insufficient mechanical reliability of the superconducting armature winding in the MW-level aviation motor are effectively solved.

A method for restoring superconductivity of a wire having a core of reacted MgB2 comprises subjecting said wire to a two-phase heat treatment, wherein a first phase comprises heating in a range of 800° C. to 1000° C. during 20 minutes to 40 minutes and a second phase comprises heating in a range of 550° C. to 750° C. during 45 minutes to 75 minutes.

This invention discloses a modular pulse-magnetized double-sided high-temperature superconducting linear synchronous motor. The motor uses high-temperature superconducting bulk material as the excitation magnet for the mover and utilizes a pulse magnetization device integrated into the magnetization section of the linear motor to achieve in-situ high remanence magnetization of the mover. The system consists of a pulse power supply system, a modular superconducting mover system, and a double-sided stator system. The pulse power supply system uses a large-capacity capacitor bank and, in conjunction with the split magnet coils in the motor's magnetization section, generates a millisecond-level strong pulsed magnetic field to achieve rapid high remanence magnetization of the high-temperature superconducting bulk material. The modular superconducting mover maintains the required low temperature for superconductivity through a Dewar structure, and the number of superconducting mover modules can be increased or decreased as needed to meet different thrust requirements. Simultaneously, the impact of local quenching is limited to a single module, preventing quenching from affecting other movers and improving system reliability. The double-sided stator structure reduces normal electromagnetic force, improves high-speed operation stability, and fully utilizes the double-sided high magnetic field advantage of the high-temperature superconducting mover to enhance the motor's thrust performance. This structure achieves a high degree of integration between the magnetization device and the motor stator, significantly improving the power density, operational stability, and maintenance convenience of the linear motor. It is suitable for applications with high requirements for the thrust performance and reliability of linear motors, such as electromagnetic launch and ultra-high-speed rail transit.

This invention provides a method for fabricating patterned ultrathin YBCO devices with zero material removal, belonging to the field of single-photon detection technology. This method utilizes hydrogen plasma to selectively modify the exposed YBCO thin film within a specific process window, thereby suppressing its superconductivity, while the photoresist-covered area retains its original high-temperature superconductivity. This achieves high-precision "zero-material-removal" patterning at the sub-micron and even nanometer scales without removing any material.

The invention provides a preparation method of a superconducting oxide thin film, the superconducting oxide thin film and application. The preparation method provided by the invention comprises the following steps: in vacuum radio frequency magnetron sputtering thin film deposition equipment, taking an ITO ceramic target material as a sputtering target material; mixed working gas of argon and oxygen is introduced into the deposition cavity, the oxygen partial pressure of the mixed working gas is adjusted to be not higher than 4%, and the total pressure intensity of the deposition cavity is controlled to be 0.1-1.5 Pa; controlling the temperature of the substrate to be 50-300 DEG C; the deposition rate of the film is controlled to be 0.1-1.5 nm / s, and the ITO oxide film with the thickness of 5-500 nm is formed through deposition. The preparation method of the superconducting oxide film, the superconducting oxide film and the application provided by the invention are used for realizing controllable preparation of an ITO oxide film with high transmittance of a communication band and superconductivity at a low temperature, and providing process support for verifying optical characteristics of the ITO oxide film in a superconducting state and realizing dual performances of high transmittance and superconductivity in the superconducting state.

A helical resonator (140) for amplifying an AC voltage for driving an ion trap comprises: a coil (144) having, as a base material, a non-superconducting metal (for example, Cu) that does not exhibit superconductivity at a predetermined cryogenic temperature; and a shield (146) surrounding the coil (144) and having, as a base material, a non-superconducting metal that is the same as or different from that of the coil (144). A plating layer is provided on at least one of the surface of the base material of the coil (144) and the surface of the base material of the shield (146), the plating layer being plated with a superconductor (for example, Pb) exhibiting superconductivity at a predetermined cryogenic temperature. The base materials of the coil (144) and the shield (146) have a higher thermal conductivity than the superconductor.

A lithographic apparatus includes: a patterning device; a first positioner for positioning the patterning device support member; a substrate support; the second positioner is used for positioning the substrate supporting piece; and a projection system configured to project a radiation beam from the patterning device onto the substrate wherein the patterning device support, the first locator, the substrate support and / or the second locator have, during use, a plurality of superconducting coils configured to generate a magnetic field, the plurality of superconducting coils are grouped into a plurality of separable and discrete modules, and the plurality of modules form an assembly when assembled; each module includes a subset of one or more coils of the plurality of coils and includes an electrical interface for providing power to the subset of one or more coils and a cooling interface for providing cooling for the superconductivity of the subset of one or more coils.

An embodiment of a method for qubit tuning includes generating a first magnetic field through a portion of a first layer, the first layer comprising a material exhibiting superconductivity in a cryogenic temperature range, the portion of the first layer above a critical temperature. In an embodiment, the method includes cooling the portion of the first layer at least to the critical temperature. In an embodiment, the method includes generating, in response to cooling the portion of the first layer at least to the critical temperature, a second magnetic field to magnetically interact with a qubit of a quantum processor chip such that a first magnetic flux of the first layer causes a first change in a first resonance frequency of the qubit by a first frequency shift value.

The application discloses a preparation method of a niobium-based Josephson junction and belongs to the technical field of low-temperature superconductivity. x The preparation method mainly comprises the following processes: cleaning a substrate; defining a bottom electrode area through photolithography; preparing an Nb bottom electrode; peeling; preparing an Al-AlO x -Al barrier layer; growing an Nb top layer electrode; defining a junction area and a top electrode area through secondary photolithography; performing reactive ion etching and ion beam etching; and removing glue. The niobium-based Josephson junction is prepared through micro-processing technology, vacuum coating technology and etching technology, so that the process is simplified; the niobium-based Josephson junction is prepared through a process of twice photolithography, so that the possibility of interface degradation of the device in the preparation process is reduced, the process of preparing the niobium-based Josephson junction is simplified, complex processing procedures are avoided, and the mass production and application of the Josephson junction are facilitated.

The invention belongs to the technical field of condensed-state physics and superconducting engineering, and discloses an EIT-inspired control and evaluation integrated system and method for driving, measuring, controlling and evaluating a steady-state room-temperature superconducting by using a culoperot. The system integrates five functional modules including a coherent period driving module, a high-Q resonant cavity / near-field enhancement module, a sample and heat management module, an electric transport and magnetic response measurement module and a KF-E criterion and self-consistent parameter adjustment controller. According to the method, through sample installation, system initialization, near-field regulation and control and steady-state data acquisition, room temperature superconducting judgment is realized by taking KF-E maximum eigenvalue = 1, BKT / 3D rigidity and energy balance as triple criteria. Extreme high voltage is not needed, the judgment is scientific and reproducible, the engineering feasibility is high, and the research and development efficiency of room-temperature superconducting can be greatly improved.