Mechanical Design, Assembly, and Test of LPF1: A 10.2 T Nb3Sn Common-Coil Dipole Magnet With Graded Coil Configuration
Mechanical Design, Assembly, and Test of LPF1: A 10.2 T Nb3Sn Common-Coil Dipole Magnet With Graded Coil Configuration
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LPF1 的机械设计、组装和测试：具有分级线圈配置的 10.2 T Nb3Sn 共线圈偶极磁体
DOI：
10.1109/tasc.2018.2880172
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发表时间：
2019-06
影响因子：
1.8
通讯作者：
Qingjin Xu
中科院分区：
文献类型：
--
作者：
Kai Zhang;Yingzhe Wang;Chengtao Wang;Da Cheng;Ershuai Kong;Quanling Peng;Quanling Peng;Zhan Zhang;Shaoqing Wei;Xiangchen Yang;Qingjin Xu
中国北京高能物理研究所设计、组装并测试了一种名为 LPF1 的 Nb3Sn/NbTi 次尺度偶极磁体，具有分级线圈设计和共线圈配置。与之前提出的FECD1相比，LPF1设计有更长的外部NbTi跑道线圈，以减少线圈端部的峰值磁场。经计算，LPF1在6100 A工作条件下的内径场和峰值线圈场分别为12.0 T和12.1 T，在4.2 K时安全裕度为17%。线圈组的水平和垂直方向采用气囊和关键技术进行预加载，线圈组的轴向通过预紧四根铝杆进行预加载。在组装之前，我们在小型壳体支撑结构中测试了电子束焊接气囊，并验证了应变测量系统。在组装过程中，我们参考插入不锈钢钥匙并取出气囊后测量的外壳应变，逐渐对线圈组进行预加载。组装完成后，我们开始在 4.2 K 下垂直测试小尺寸偶极磁体。LPF1 经过 13 次训练淬火后达到 10.2 T 的孔场，然后达到稳定的淬火电流而不会失训练。本文介绍了 LPF1 的更新设计参数、应力分析、磁体组件和测试。
An Nb3Sn/NbTi subscale dipole magnet named LPF1 with graded coil design and common-coil configuration has been designed, assembled, and tested at the Institute of High Energy Physics, Beijing, China. Compared to the previously proposed FECD1, LPF1 is designed with a longer outer NbTi racetrack coil to reduce the peak field in the coil end. The computed bore field and peak coil field of LPF1 is 12.0 T and 12.1 T, if it works at 6100 A with a safety margin of 17% at 4.2 K. The horizontal and vertical directions of the coil packs are preloaded by using bladder and key technology while the axial direction of the coil packs is preloaded by pretightening four aluminum rods. Before assembly, we tested the electron-beam welded bladders in a subscale shell-support structure and verified the strain measurement system. During assembly, we preloaded the coil packs gradually by referring to the measured shell strain after inserting stainless steel keys and removing the bladders. After assembly, we started to test the subscale dipole magnet vertically at 4.2 K. LPF1 reached a bore field of 10.2 T after 13 training quenches and then it reached a stable quench current without detraining. This paper presents the updated design parameters, the stress analysis, the magnet assembly, and test of LPF1.
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DOI：
--
发表时间：
2011-04
期刊：
Lawrence Berkeley National Laboratory
影响因子：
--
作者：
A. Lietzke
通讯作者：
A. Lietzke
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影响因子：
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DOI：
--
发表时间：
1998-11
期刊：
Lawrence Berkeley National Laboratory
影响因子：
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