Low temperature superconducting assembly with low joint resistance for high temperature superconducting current lead cold end

A current lead, low-temperature superconducting technology, applied in superconducting magnets/coils, electrical components, connecting contact materials, etc., can solve problems such as easy leakage and difficult to repair
CN101694908AInactive Publication Date: 2010-04-14INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
Publication Date
2010-04-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a low temperature superconducting assembly with low joint resistance for a high temperature superconducting current lead cold end. The resistance of a 40-70kA high temperature superconducting super current lead of which the lower end is connected with a low temperature superconducting bus must be as low as 1 nano-ohm. A rectangular section niobium-titanium / copper superconducting wire or a high conductivity copper material and a paired box type joint structure connected with the superconducting bus are adopted in the low temperature superconducting assembly. Tests prove that the joint resistance of the low temperature superconducting assembly and a high temperature superconducting assembly can be as low as 0.5 nano-ohm, and the joint resistance of the superconducting bus is lower than 1 nano-ohm. The low temperature superconducting assembly is a middle result for developing super current leads of an international thermonuclear fusion test reactor and has the characteristics of novel conception and low manufacturing cost.
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Description

Technical field:

[0001] The invention belongs to the technical field of feeders for low-temperature superconducting magnets. Background technique:

[0002] Thermonuclear fusion will be the way to completely solve the energy demand of mankind, and the International Thermonuclear Test Reactor (ITER) program will be implemented in the next ten years. The current leads feeding the large superconducting magnets are the most significant source of heat load. The use of high-temperature superconducting (HTS) current leads can save 2 / 3 of the cooling power consumption. In 2003 and 2004, Japan and Germany successively developed 60kA and 70kA HTS current leads for ITER magnets, which are comparable to conventional copper current leads in low temperature tests. pair. The Japan Atomic Energy Institute uses many niobium-titanium superconducting wires to connect the HTS components and copper current leads, and immerses them in liquid helium for cooling, which is purely an expedient metho...

Claims

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