Mechanical Properties Evaluation of Large Scale Superconductors in High Magnetic Field and Large Current under Cryogenic Temperatute.

低温强磁场大电流下大型超导体力学性能评价。

基本信息

批准号：
06555207
负责人：
NISHIMURA Arata
金额：
$ 11.65万
依托单位：
National Institute for Fusion Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

Large scale plasma devices, such as the Large Helical Device, the Wenderstein 7-X and the International Thermo-nuclear Experimental Reactor, have been planed and started to fabrication. These large devices require the large scale superconducting magnet to generate high magnetic fields. Since huge electro-magnetic forces will act on the superconducting magnet during the operation, the mechanical deformation behavior must estimate before fabrication. For this purpose, the several kinds of measurements for the deformation evaluation have been carried out in this study.1.NbTi superconductor which had a copper ratio of 1.0 to 2.0, was deformed locally at room temperature, and then was cooled into liquid helium. In this case, a recovery after quenching was delayd because of the increase of an electrical resistance of copper. On the other hand, when the superconductor was deformed at cryogenic temperature, the recovery occurred in a normal way. From these results, it was recognized that the changes of the electric property of a stabilizer were affected by the mechanical deformation and it should be noted on the magnet design and fabrication.2.The superconductors which was used for the Large Helical Device had a rather stability to mechanical deformation. The coil deformation would be estimated by the mechanical test using a coil pack.3.An excitation test of Inner Vertical coil of the Large Helical Device was carried out, and the deformation during cooling period and excitation test was measured successfully. In the deformation measurement, cable wires should be considered not to be affected by magnetic field.

大规模的等离子体设备，例如大型螺旋装置，Wenderstein 7-X和国际热核实验反应堆，已经计划并开始制造。这些大型设备需要大型超导磁铁来产生高磁场。由于巨大的电磁力将在操作过程中作用于超导磁体，因此在制造之前必须估计机械变形行为。为此，在本研究中已经进行了多种变形评估的测量结果。1.NBTI超导体的铜比为1.0至2.0，在室温下局部变形，然后冷却到液体氦气中。在这种情况下，由于铜的电阻增加，淬火后的恢复是延迟的。另一方面，当超导体在低温温度下变形时，恢复以正常方式发生。从这些结果中可以认识到，稳定器的电特性的变化受到机械变形的影响，应在磁铁设计和制造上注意。2。用于大型螺旋装置的超导体具有相当稳定的机械变形。线圈变形将通过机械测试使用线圈板进行估算。3。进行大型螺旋装置的内部垂直线圈的激发测试，并在冷却期间和激发测试成功测量了变形。在变形测量中，应将电缆线视为不受磁场的影响。