合肥先进光源储存环超导纵向梯度弯铁样机研制

陈超; 杜双松; 胡锐; 李为民; 王琳; 冯光耀

doi:10.11884/HPLPB202436.230407

合肥先进光源储存环超导纵向梯度弯铁样机研制

doi: 10.11884/HPLPB202436.230407

陈超^1,,
杜双松²,
胡锐³,
李为民¹,
王琳^1, ,,
冯光耀^1, ,

1.
中国科学技术大学国家同步辐射实验室，合肥 230029
2.
中国科学院合肥物质科学研究院，等离子体物理研究所，合肥 230031
3.
合肥中科离子医学技术装备有限公司，合肥 230088

基金项目: 国家自然科学基金项目(12205299); 国家重点研发计划项目（2016YFA0402000）

详细信息

作者简介:
陈　超，cc4555@mail.ustc.edu.cn

通讯作者:
王　琳，wanglin@ustc.edu.cn

冯光耀，fenggy@ustc.edu.cn。

中图分类号: TL594；O441；O514
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- 文章访问数: 203
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- PDF下载量: 33
- 被引次数: 0
出版历程
- 收稿日期: 2023-11-17
- 修回日期: 2024-03-09
- 录用日期: 2024-03-09
- 网络出版日期: 2024-05-25
- 刊出日期: 2024-07-04

Development of a superconducting longitudinal gradient bend prototype for Hefei Advanced Light Facility storage ring

Chen Chao^1
,,
Du Shuangsong²,
Hu Rui³,
Li Weimin¹,
Wang Lin^{1
, ,},
Feng Guangyao^{1
, ,}

1.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
2.
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
3.
Hefei CAS Ion Medical Technical Device Co. , Ltd, Hefei 230088, China

摘要

摘要: 介绍了合肥先进光源储存环超导纵向梯度弯铁样机的研制工作，基于已发展的一种磁体结构参数优化方法，综合考虑磁场空间分布需求和超导线圈工作负载，完成了磁铁结构的设计和优化。为了验证磁体设计方案，应用一种矩形铌钛线材和DT4C电工纯铁材料，研制了一台纵向长度0.30 m、磁极间隙46 mm的磁体样机。并搭建了一套简易低温测试装置，对该磁体进行了励磁特性测量，经过10余次失超，测得磁体最大工作电流大于275 A。磁体纵向磁场分布测量结果表明，该磁体在约196 A工作电流下，纵向磁场积分值达到0.4 T·m，峰值磁场约4.5 T。测试结果与理论设计结果基本一致，表明该种超导磁体的设计是可行的。
- 衍射极限储存环 /
- 超导纵向梯度弯铁 /
- 铌钛超导线圈 /
- 低温测试 /
- 失超
Abstract: This paper presents the development of superconducting longitudinal gradient bend prototype for Hefei Advanced Light Facility storage ring. The magnet structure parameters were optimized using a developed method that considered the requirements of spatial magnetic field distribution and magnet operating load. To verify the magnet design, a prototype magnet with a longitudinal length of 0.30 m and a pole gap of 46 mm was fabricated using a rectangular niobium-titanium wire and DT4C material. A simple low-temperature test device was built to measure the magnetizing characteristics of the magnet, and after more than 10 times of quench, the maximum operating current of the magnet was measured to be more than 275 A. The longitudinal magnetic field distribution of the magnet was measured, revealing an integral field of 0.4 T·m and a peak magnetic field of approximately 4.5 T at an operating current of about 196 A. The test results are basically consistent with the theoretical design, indicating that the design is reliable.
- diffraction-limited storage ring /
- superconducting longitudinal gradient bend /
- NbTi superconducting coil /
- cryogenic test /
- quench

HTML全文

图 1 超导纵向梯度二极磁铁与常规纵向梯度二极磁铁辐射亮度对比

Figure 1. Brightness of SLGB versus normal LGB

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图 2 SLGB样机示意图

Figure 2. Sketch of the SLGB (superconducting longitudinal gradient bend) prototype

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图 3 SLGB样机纵向磁场B_y分布仿真结果

Figure 3. Simulated longitudinal magnetic field profile of the SLGB protype

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图 4 一定横向范围内纵向磁场积分与对称中心处纵向磁场积分的相对偏差(用颜色表示大小)

Figure 4. Relative deviation of the longitudinal magnetic field integral within a specific transverse range from the longitudinal magnetic field integral at the symmetrical center (different colors denote different numerical values)

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图 5 磁体样机装配示意图

Figure 5. Schematic assembly of the protype magnet

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图 6 测试装置示意图

Figure 6. Sketch of the test device

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图 7 失超保护电路示意图

Figure 7. Schematic of quench protection circuit

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图 8 SLGB样机测试系统组成框架

Figure 8. Framework of the SLGB prototype testing system

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图 9 步进电机驱动磁测装置

Figure 9. Stepper motor driven magnetic measurement device

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图 10 磁测孔位示意图

Figure 10. Schematic of the magnetic field measurement positions

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图 11 SLGB样机部分磁测数据

Figure 11. Partial data from magnetic field measurements of the SLGB prototype

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表 1 铌钛超导线材主要参数

Table 1. Main parameters of the NbTi wire

bare wire size	insulated wire size	Cu:NbTi ratio	critical current at 4.2 K, 7 T/A	number of filaments	filament diameter/μm	RRR (273 K/10 K)
1.20 mm×0.75 mm	1.28 mm×0.83 mm	1.3	≥566	630	27.6	≥566

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表 2 超导纵向梯度二极磁铁样机主要设计参数

Table 2. Main design parameters of the SLGB prototype

magnet type	yoke thickness/mm	pole gap/mm	pole length along beam/mm	pole length transverse to beam/mm	turns per layer	number of layers	conductor length per coil/m	operating current/A	peak field at conductor/T	stored energy/kJ
racetrack coils, DT4 yoke and pole	120	46	39	109	38	36	500	252	6.35	14

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表 3 低温装置热负载计算结果

Table 3. Calculation results for the heat load of cryogenic device

source of thermal load	first stage cold head thermal load/W	second stage cold head thermal load /W
G10 rods	0.15×4	0.07×4
thermal radiation	2.3	0.2
current leads (thermal conduction)	8×2	0.1×2
current leads (joule heat)	10×2	——
pipes	4	0.1
gas	0.4	0.03
else	1	0.1
total	44.3	0.71

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表 4 SLGB样机实测结果与仿真结果对比

Table 4. Comparison between measured results and simulation results of the SLGB prototype

	I_in/A	B_p/T	∫B_ydz/(T·m)
measurement	195.56	4.5245	0.4004
original simulation	251.40	4.8985	0.3992
updated simulation	240.41	4.6019	0.4000

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