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早期的高场超导磁体并不具有令人满意的性能,不能在由小样品显示的电流密度下运行,这种现象叫做退化。这种现象的存在使磁体变得很不安全。因此,人们在千方百计地提高超导材料临界电流密度的同时,还大力研究稳定化技术,克服退化效应,以充分利用超导材料的现有性能和保证设备的安全可靠。通常在锟钛超导合金外面都敷以高导电无氧铜。但从传热导电方面考虑,一般须把超导线埋在断面积比它大20倍的铜基
Early high-field superconducting magnets did not perform satisfactorily and could not operate at the current densities shown by small samples, a phenomenon known as degeneration. The existence of this phenomenon makes the magnet very insecure. Therefore, people do everything possible to improve the critical current density of superconducting materials, but also vigorously study the stabilization technology to overcome the degeneration effect, in order to make full use of the existing properties of superconducting materials and ensure the safety and reliability of equipment. Usually outside the surface of Kun Titanium superconducting alloy deposited with high conductivity oxygen-free copper. However, considering the heat conduction, the superconducting wire must generally be buried in a copper base that is 20 times larger in cross-sectional area