Abstract Generally, DEMO requires larger toroidal field (TF) coils than ITER, resulting in one of the major difficulties, the tolerance in TF coil fabrication. This paper presents the possible solutions based on the design study on Japan’s DEMO (JA DEMO). It was confirmed that, in the case of adopting a mitigated tolerance by a factor of 2.5–5 compared with that of ITER, the resulting error field of TF coils is correctable to an acceptable level in terms of locked mode avoidance. In addition, the design of the error field correction coil (EFCC) on JA DEMO was investigated.

中文翻译：

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减轻JA DEMO反应堆超导磁体制造公差的磁误差场估计

摘要 通常，DEMO 需要比 ITER 更大的环形场 (TF) 线圈，这导致了主要困难之一，即 TF 线圈制造的公差。本文基于对日本DEMO（JA DEMO）的设计研究，提出了可能的解决方案。经证实，在采用与 ITER 相比降低 2.5-5 倍的容差的情况下，TF 线圈产生的误差场在避免锁定模式方面可以纠正到可接受的水平。此外，还研究了 JA DEMO 上的误差场校正线圈 (EFCC) 的设计。