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Stability Simulation of 46-kA and 13-T Nb_3Al Insert Coil

机译：46-KA和13-T NB_3AL插入卷的稳定性模拟

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The 46 kA and 13 T Nb_3Al Insert Coil (ALI) will be fabricated and tested with Center Solenoid Model Coil under the framework of ITER-EDA. ALI will be tested at the nominal current of 46 kA and, in addition, at 60 kA as an extra operation. The stability of ALI for short perturbation was investigated on transport currents from 40 to 60 kA and in a magnetic field of 13 T using the quasi-two-dimensional simulation code, POCHI2, in which the coolant temperature in the effective thermal boundary layer is numerically solved. A non-uniform meash system was used to accurately simulate the stability. The simulation results indicate the transition from well-cooled region takes place beyond 46 kA since the recovery temperature becomnes smaller than the current sharing temperature at currents of more than 46 kA. Thus, sufficient degree of stability can be expected for ALI at the design point. In addition, the stability margin is evaluated to be 250 mJ/cm~3 at 60 kA. The extra operation to 60 kA is therefore expected to be prossible.
机译：在磨料-EDA的框架下，将用中心螺线管模型线圈制造和测试46kA和13 T NB_3AL插入卷（ALI）。 Ali将在46 ka的标称电流下进行测试，另外，在60 ka的额外操作中。研究了Ali用于短扰动的稳定性，在40至60ka的运输电流和13t的磁场中使用准二维仿真码，Pochi2，其中有效热边界层中的冷却剂温度在数值上解决了。使用非均匀的MEESH系统来精确模拟稳定性。模拟结果表明，由于恢复温度比电流超过46ka的电流共享温度小于46ka，因此从冷却区域的过渡发生超过46ka。因此，在设计点处的ALI可以预期足够的稳定性。另外，稳定性余量在60ka下评估为250mJ / cm〜3。预计预计额外的操作至60 ka是不可能的。

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