Preparation method of NbTi superconducting wire joint

A production method and technology of superconducting joints, which are applied in the direction of connecting contact materials, connections, circuit/collector components, etc., can solve the problems of inconvenient operation, unstable performance, and low yield rate, etc. Simple, stable performance

Inactive Publication Date: 2012-10-17
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

[0003] Conventional ultrasonic welding, laser welding and other processes have problems such ...

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  • Preparation method of NbTi superconducting wire joint
  • Preparation method of NbTi superconducting wire joint
  • Preparation method of NbTi superconducting wire joint

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] like figure 1 Shown is a schematic diagram of the structure of the superconducting joint provided by the present invention. The connector has the advantages of simple structure, easy manufacture, stable performance, low resistance, etc., including:

[0027] The NbTi composite superconducting wire (1) is etched with acid to remove stable substrates such as copper or aluminum at its end to form a NbTi superconducting wire (2). Twist and braid the superconducting wires (2) of several superconducting wires that need to make superconducting joints, clean the stains on the surface of the superconducting wires (2) with alcohol or acetone, clean and dry, and insert them into the NbTi cold-pressed tube (3) inside.

[002...

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Abstract

The invention discloses a preparation method of a NbTi superconducting joint and relates to a superconducting joint technology. The method comprises the steps of: a) preparing superconducting filaments by NbTi superconducting wires; b) twisting and weaving a plurality of the superconducting filaments together; c) inserting twisted ends of the superconducting filaments into a cold pressing tube in such a manner that the superconducting filaments extend out of the cold pressing tube from the other end; d) applying pressure to a straight section of the cold pressing tube to combine the superconducting filaments and the cold pressure tube together; e) placing the combined cold pressing tube into a copper sleeve and padding welding flux; and f) heating, cooling and solidly jointing at room temperature to obtain a finished product. The preparation method of the NbTi superconducting joint provided by the invention has the advantages of simple structure, simple and convenient preparation, and stable and reliable performance.

Description

technical field [0001] The invention relates to a method for manufacturing a superconducting joint, in particular to a method for manufacturing a superconducting joint of a superconducting magnet in a closed-loop working mode. Background technique [0002] Devices such as superconducting nuclear magnetic resonance imaging (MRI) and superconducting nuclear magnetic resonance spectrometer (NMR) require superconducting magnets to operate in a closed loop in order to obtain a highly stable magnetic field. Therefore, it is required that in the superconducting magnet, the connection between the coils and the connection resistance between the coil and the superconducting switch are all required to be very small. It has been reported that for MRI setups, the joint resistance is less than 10 -11 ohms; less than 10 for NMR devices -14 ohm. [0003] Conventional ultrasonic welding, laser welding and other processes have problems such as complex process, unstable performance, and inc...

Claims

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Application Information

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IPC IPC(8): H01R4/68H01R43/02H01R43/033H01R43/048
Inventor 侯治龙朱自安赵玲马文彬王美芬
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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