A superconducting quadrupole magnet based on the Canted-Cosine-Theta (CCT) type coil with a gradient field of 40 T/m and a bore diameter of 60 mm has been designed for the preresearch of two projects of high intensity accelerator facility (HIAF) and accelerator driven subcritical system (ADS). The magnet is comprised of two-layer coils embedded in the formers and the end plates for locating. The coil formers made of aluminum alloy are machined with grooves according to the drive equations of CCT for placing the wires. The existence of ribs between two adjacent wires can avoid accumulation of the electromagnetic force. It is important to take the mechanical design for the complex structure to avoid tensile stresses on the conductor and confine the stresses within a reasonable value. The stress analysis for the quadrupole magnet has been carried out considering the thermal shrinking due to cool down as well as the electromagnetic force on the coil. This paper reports the detailed stress analysis for the CCT quadrupole magnet structure, discusses the calculating results, and gives a reasonable mechanical design.

中文翻译：

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斜余弦-θ（CCT）超导四极磁铁的结构设计与分析

基于斜余弦-θ（CCT）型线圈的超导四极磁铁，梯度场为40 T / m，孔径为60 mm，用于高强度加速器设施（HIAF）两个项目的预研究和加速器驱动的亚临界系统（ADS）。磁铁由嵌入线圈架和端板的两层线圈组成，用于定位。由铝合金制成的线圈架根据 CCT 的驱动方程加工有凹槽，用于放置导线。相邻两根导线之间肋的存在可以避免电磁力的积累。重要的是对复杂结构进行机械设计，以避免导体上的拉应力并将应力限制在合理的值内。四极磁铁的应力分析已经考虑了由于冷却引起的热收缩以及线圈上的电磁力。本文报告了 CCT 四极磁体结构的详细应力分析，讨论了计算结果，并给出了合理的机械设计。