An evolution of the contact resistances (R/sub c/) of two full-size ITER (International Thermonuclear Experimental Reactor) cable-in-conduit conductors (CICC) aimed for the Poloidal Field Conductor Insert (PFCI) was studied in the Twente Cryogenic Press. The conductors are distinguished by the presence of stainless steel wraps around the last stage sub-cables in one of the conductors. The R/sub c/ and AC loss were measured on the conductors being in the "virgin" state and after they have been loaded 40,000 times with a peak force of 315 kN/m. The test results are compared with those, obtained on sections from the same conductor lengths, in the SULTAN test facility. The consequences of the cyclic loading and the sub-cable wraps on the R/sub c/ and the coupling AC loss are discussed in view of the previously published results on full- and sub-size ITER NbTi CICCs. Special emphasis was paid to the measurements of the contact resistances between individual sub-cables and the conduit, since the knowledge of them is important for proper interpretation of the DC test results. As a final goal, the test outcome will be used as a reference for calibration of the PFCI AC loss performance.
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机译:在Twente低温技术中研究了两种用于极性电场导体插入件(PFCI)的全尺寸ITER(国际热核实验堆)导管内电缆导体(CICC)的接触电阻(R / sub c /)的变化。按。导体的特点是,其中一根导体的最后一级子电缆周围有不锈钢包裹层。在处于“原始”状态的导体上并以315 kN / m的峰值力加载40,000次后,测量R / sub c /和AC损耗。将测试结果与在SULTAN测试设备中从相同导体长度的截面上获得的结果进行比较。鉴于先前发布的关于全尺寸和小尺寸ITER NbTi CICC的结果,讨论了循环载荷和R / sub c /上的子电缆绕线以及交流耦合损耗的后果。特别要注意各个子电缆和导管之间的接触电阻的测量,因为它们的知识对于正确解释直流测试结果很重要。作为最终目标,测试结果将用作PFCI AC损耗性能校准的参考。
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