2-D Mechanical Design Study of a 20-T Two-in-One Common-Coil Dipole Magnet for High-Energy Accelerators
2-D Mechanical Design Study of a 20-T Two-in-One Common-Coil Dipole Magnet for High-Energy Accelerators
复制标题
DOI：
10.1109/tasc.2016.2541304
复制
发表时间：
2016-03
影响因子：
1.8
通讯作者：
Kai Zhang;Qingjin Xu;Zian Zhu;Chengtao Wang;Yinan Hu;F. Ning;Ling Zhao;Meifen Wang;Weichao Ya
中科院分区：
文献类型：
--
作者：
Kai Zhang;Qingjin Xu;Zian Zhu;Chengtao Wang;Yinan Hu;F. Ning;Ling Zhao;Meifen Wang;Weichao Ya
中国北京高能物理研究所提出了一种两级粒子对撞机，即CEPC-SppC。圆形正电子对撞机（CEPC）一期实验结束后将升级为超级质子对撞机（SppC）。根据SppC要求，主偶极子场强为20T，三分之二孔径内应达到10-4级场均匀度。外径限制为900毫米。 20-T 二合一共线圈偶极磁体的磁性设计研究已经完成并先前提出。本文主要通过建立基于壳结构的二维有限元模型来进行相应的机械设计研究。采用水加压囊对线圈施加预紧力，压力为80 MPa。峰值线圈应力被最小化，以减少超导体的临界电流退化。选择适当的铝壳厚度，以克服主偶极子外径限制下较大的洛伦兹力。
A two-stage particle collider, i.e., CEPC-SppC, is proposed by the Institute of High Energy Physics (Beijing, China). The circular electron-positron collider (CEPC) will be upgraded to a super proton-proton collider (SppC) after the first-stage experiment. According to the requirement of SppC, the field strength of the main dipoles is 20 T, and 10-4 level field uniformity should be reached within two thirds of the aperture. The outer diameter is restricted to be 900 mm. The magnetic design study of a 20-T two-in-one common-coil dipole magnet has been done and previously presented. This paper mainly focuses on the corresponding mechanical design study by establishing a two-dimensional finite-element model with a shell-based structure. The water-pressurized bladder is adopted to apply the preload on coils with the pressure of 80 MPa. The peak coil stress is minimized to reduce the critical current degradation of superconductors. An appropriate aluminum shell thickness is selected to overcome the significant Lorentz force under the restriction of the main dipole's outer diameter.