Current lead structure of recondensed superconducting magnet
A technology of current leads and superconducting magnets, applied in superconducting magnets/coils, magnetic objects, circuits, etc., can solve problems such as large temperature difference of heat exchangers, high temperature current leads, and influence on the stability of current leads, and achieve thermal bridge Small thermal resistance, reduced working temperature, and simple structure
Inactive Publication Date: 2011-10-19
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
Although the current binary current leads can meet the requirement of supplying power to the low-temperature end, there are still shortcomings, mainly because the temperature difference inside the heat exchanger is large, and the temperature at the upper end of the high-temperature current lead is too high, which affects the stability of the current lead.
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[0046] 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.
[0047] Such as figure 1 as shown, figure 1 A schematic diagram of the current lead structure of the recondensed superconducting magnet provided by the present invention. The current lead structure is a binary current lead structure with simple structure and reliable performance, including:
[0048] The copper current lead 20 located at the upper end, the copper current lead 20 is connected to the high temperature part, adopts the copper current lead, according to the requirements of formulas (1) and (2), adopts the optimal length and cross-sectional size to achieve the minimum heat leakage requirement;
[0049] The high-temperature superconducting current lead 40 located at the lower end, the high-temperature supercondu...
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The invention discloses a current lead structure of a recondensed superconducting magnet, which comprises a copper current lead (20) positioned at the upper end and connected with a high temperature part, a high-temperature superconducting current lead (40) positioned at the lower end and connected with a low temperature part and a heat exchanger (30) connected with the copper current lead (20) and the high-temperature superconducting current lead (40); and after the copper current lead (20) is firstly welded with an upper cooper block (301) of the heat exchanger (30), the copper current lead(20) and the high-temperature superconducting current lead (40) are welded together on a lower copper block (303) of the heat exchanger (30). The provided current lead structure of the re-condensed superconducting magnet has a simple structure, stable performance, reliable operation and small heat leakage and reduces the temperature difference of the inside of the heat exchanger to the maximal extent, thereby reducing the temperature at the upper end of the high-temperature current lead and improving the stability of the lead.
Description
technical field [0001] The invention relates to the technical field of high-temperature superconducting current leads, in particular to a current lead structure of a recondensed superconducting magnet. Background technique [0002] The current lead of the recondensed superconducting magnet is a current-carrying device connecting the power supply at the room temperature end and the superconducting magnet at the low temperature end. The design of the current lead of the recondensing superconducting magnet requires that under a given operating current, the sum of the heat conduction from the high temperature end to the low temperature end and the Joule heat of the lead itself is minimized. [0003] Under a certain operating temperature range of the current lead and a given operating current, there is a minimum value for the leakage heat of the current lead from the high temperature end to the low temperature end, and its value is: [0004] Q min ...
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IPC IPC(8): H01F6/06
Inventor 朱自安马文彬易昌练侯治龙王美芬
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI