Abstract—

The magnetic flux through the diamagnetic loop consists of two parts: one is produced by the poloidal current in the plasma and another by the external currents. Separation of these parts is the focus of the study, which is fully analytical. The system is assumed to be axially symmetric. Then the “inductances” in the flux–current relations are expressed via easily tractable integrals. With such precisely defined coefficients, the theoretical possibility of perfect separation by means of two independent simultaneous measurements is demonstrated. The desired result can be obtained with quantities measured by either double-loop method or with a single diamagnetic loop and a correction coil. This conclusion is more optimistic that those in the generally accepted concepts. An additional step is proposed to determine, with the same magnetic data, the poloidal current induced in the vacuum vessel wall. This current can be useful for evaluation of the disruption force on the wall. The proposed algorithms can be used in existing tokamaks with two loops and in the ITER as well.

中文翻译：

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托卡马克中具有两个回路的反磁测量的诊断潜力

摘要-

通过反磁环的磁通量由两部分组成：一部分是由等离子体中的极向电流产生的，另一部分是由外部电流产生的。这些部分的分离是研究的重点，这是完全分析性的。假定该系统是轴向对称的。然后，通量-电流关系中的“电感”通过易于处理的积分表示。利用这样精确定义的系数，论证了通过两个独立的同时测量进行完美分离的理论可能性。可以通过双回路方法或单个反磁回路和校正线圈测量的量获得所需结果。这个结论比那些普遍接受的概念更为乐观。建议采取附加步骤，以相同的磁数据确定 在真空容器壁中感应的极向电流。该电流可用于评估壁上的破坏力。所提出的算法可以在具有两个回路的现有托卡马克中以及在ITER中使用。