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首页> 外文期刊>IEEE Transactions on Applied Superconductivity >Test results of a cable-in-conduit superconductor for the WENDELSTEIN 7-X stellarator
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Test results of a cable-in-conduit superconductor for the WENDELSTEIN 7-X stellarator

机译:WENDELSTEIN 7-X恒星器的电缆导管超导体的测试结果

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摘要

The superconducting magnet system of the modular stellarator WENDELSTEIN 7-X consists of 50 nonplanar and 20 planar coils. The nominal current is 16 kA at 6 T and at 4.2 K. The minimum bending radius of 0.2 m required the development of a suitable conductor. The concept is based on a NbTi forced-flow superconductive cable embedded in an aluminium alloy jacket. This is relatively soft during coil winding but gets its design strength by hardening during the impregnation process of the winding. As a step of the development programme, two 200 m long conductor lengths were fabricated by Europa Metalli, Italy, and Noell, Germany, together with SwissMetal, Switzerland. At Tesla, UK, each conductor length was wound to a planar coil of 0.2 m inner radius using the same winding and impregnation procedure as intended for the future series coils. The model coils were tested in the STAR facility at the Forschungszentrum Karlsruhe in order to investigate the behaviour of a long sample conductor. The model coils have been operated at various temperatures under self-field and background field conditions. Experimental results of the second model coil are presented, and a comparison to test results obtained for the LMI conductor is given.
机译:模块化恒星器WENDELSTEIN 7-X的超导磁体系统由50个非平面线圈和20个平面线圈组成。在6 T和4.2 K时,标称电流为16kA。0.2m的最小弯曲半径要求开发合适的导体。该概念基于嵌入铝合金护套中的NbTi强制流动超导电缆。这在线圈缠绕过程中相对较软,但在缠绕的浸渍过程中会通过硬化而获得设计强度。作为开发计划的一个步骤,意大利的Europa Metalli和德国的Noell以及瑞士的SwissMetal制造了两根200 m长的导体。在英国特斯拉,使用与将来串联线圈相同的绕组和浸渍程序,将每条导体的长度都缠绕到内径为0.2 m的平面线圈上。为了研究长样品导体的性能,模型线圈在卡尔斯鲁厄Forschungszentrum的STAR设施中进行了测试。在自然磁场和背景磁场条件下,模型线圈已在各种温度下工作。介绍了第二个模型线圈的实验结果,并与LMI导体的测试结果进行了比较。

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