CCT型超导组合磁体样机结构设计

Structure design of CCT superconducting combined magnet prototype

基于斜螺线管型(Canted-Cosine-Theta,简称CCT)线圈结构,研制了一台四极与六极组合的超导磁体样机,它的四极和六极梯度场分别为22 T/m和120 T/m^(2)。该组合型磁体的好场区范围为Φ0.16 m×1.3 m,有效长度为1.3 m。其中四极与六极磁体均采用两层骨架结构,每层骨架的线槽内并排放置多层多根超导线。本文根据导体轨迹,以约束电磁力为结构设计目标,设计了磁体关键部件线圈支撑骨架和磁体内外支撑结构,并介绍了磁体制造过程中的关键环节。

A combined function superconducting magnet prototype based on Canted-Cosine-Theta(CCT) type was developed. This magnet produced a quadrupole gradient field of 22 T/m and a hexapole gradient field of 120 T/m^(2). The coil aperture of the combined magnet was 200 mm, and the good field region was Φ0.16 m×1.3 m. Both of the quadrupole and hexapole magnets consisted of two layer coil frames with a shape of cylindrical tube which would be finally put together. The superconducting wires were placed side by side into the grooves which were machined on the tubes in accordance with the trajectory of the conductors. To restrict the electromagnetic force on the conductors, the coil support frames and the internal and external support structure were designed. In this paper the design and fabrication of the magnet were presented in detail. The test of magnetic field was also reported.