Cold end of heavy current lead out wire made from high-temperature superconductor, and low resistance connector of superconducting transmission line

A high-temperature superconducting and superconducting wire technology, which is applied in the direction of superconducting magnets/coils, circuits, electrical components, etc., can solve problems such as difficult, complicated processes, and joints are not considered

A high-temperature superconducting and superconducting wire technology, which is applied in the direction of superconducting magnets/coils, circuits, electrical components, etc., can solve problems such as difficult, complicated processes, and joints are not considered

CN1873847AInactive Publication Date: 2006-12-06INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Cold end of heavy current lead out wire made from high-temperature superconductor, and low resistance connector of superconducting transmission line
  • Cold end of heavy current lead out wire made from high-temperature superconductor, and low resistance connector of superconducting transmission line

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Embodiment Construction

[0019] Labels in the figure: 1. Copper parts at the warm end of the high-temperature superconducting section, 2. High-temperature superconducting stacks, 3. Stainless steel support cylinders with low thermal conductivity, 4. Core plugs with small return holes, 5. High-conductivity copper pipes at the cold ends, 6 .NbTi / Cu superconducting wire (100 pieces), 7. Seal brazing copper ring, 8. Reducer tube, 9. High conductivity copper joint with diversion hole, 10. Inner copper tube, 11. Outer copper tube, 12 .CICC superconducting transmission line end, 13. High conductivity copper spacer, 14. Supercritical helium inflow inlet, 15. Supercritical helium outflow outlet pipe, 16. Air inlet chamber, 17. Diversion hole, 18. Cooling airflow channel .

[0020]The cold end of the high-temperature superconducting high-current lead wire and the low-resistance joint of the superconducting transmission line have a low-thermal-conductivity stainless steel support cylinder 3, and 50 high-temperat...

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Abstract

The disclosed adaptor between cold junction of leading wire in heavy current of high-temperature superconductor and low resistance of superconducting transmission line includes structure: welding piles of high-temperature superconductor arranged in spaces to outer wall of support tube made from stainless steel in low thermal conductance; welding warm end in piles of high-temperature superconductor to transition piece of copper; through braze welding, cold end in piles is joined to NbTi / Cu superconducting line; cross winding NbTi / Cu line on inner copper tube sheathed inside outer copper tube; cooling superconducting line and copper connector by using liquid helium between inner and outer copper tubes. Features are: simple structure, suitable to connection under 20kA. In the invention, resistance of adaptor is lowered as 1.4-4.6n ohm. In supercritical quantity of helium flow 4g / s, all loss of 6 pieces of adaptor and 12 pieces of butt end of transmission line is less than 0.1Mpa.

Description

technical field [0001] The invention belongs to the high-temperature superconducting current lead wire feeding technology of a large superconducting magnet. Specifically, it is a low-resistance joint technology between the cold end of a high-temperature superconducting high-current lead wire and the end of a low-temperature superconducting transmission line. Background technique [0002] The development of engineering superconducting materials in the 1960s made it possible for superconducting technology to be applied to high-energy accelerators, nuclear fusion experimental devices and high-field magnets on a large scale. Compared with conventional magnets, superconducting magnet power supply costs and operating costs are greatly reduced, replaced by cryogenic system equipment costs and operating costs to maintain superconducting magnet operating conditions. The difficulty of 4K low-temperature refrigeration technology hinders the popularization and application of low-temper...

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Application Information

Patent Timeline
06 Dec 2006
Publication
CN1873847A
IPC
H01F6/06
Inventors
毕延芳; 马登奎