武汉光源脉冲的非线性冲击磁铁设计研究

刘媛; 朱兵; 雷健; 杨军; 樊宽军; 陈沅

doi:10.11884/HPLPB202436.240205

武汉光源脉冲的非线性冲击磁铁设计研究

doi: 10.11884/HPLPB202436.240205

刘媛^1,,
朱兵¹,
雷健²,
杨军^1, ,,
樊宽军¹,
陈沅³

1.
华中科技大学强电磁技术全国重点实验室，武汉 430074
2.
国网上海市电力公司市南供电公司，上海 200233
3.
武汉大学先进光源研究中心，武汉 430074

基金项目: 国家重点研发计划项目（2022YFA1602202）

详细信息

作者简介:
刘　媛，m202372454@hust.edu.cn

通讯作者:
杨　军，jyang@hust.edu.cn。

中图分类号: TL503
计量
- 文章访问数: 131
- HTML全文浏览量: 41
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2024-06-21
- 修回日期: 2024-10-24
- 录用日期: 2024-10-24
- 网络出版日期: 2024-11-09
- 刊出日期: 2024-11-08

Design of pulsed nonlinear kicker magnet for Wuhan light source

Liu Yuan^1
,,
Zhu Bing¹,
Lei Jian²,
Yang Jun^{1
, ,},
Fan Kuanjun¹,
Chen Yuan³

1.
State Key Laboratory of Advanced Electromagnetic Technology, Huazhong University of Science and Technology, Wuhan 430074, China
2.
State Grid Shanghai Shinan Electric Power Supply Company, Shanghai 200233, China
3.
Advanced Light Source Research Center, Wuhan University, Wuhan 430074, China

摘要

摘要: 近年来，基于非线性冲击磁铁的离轴注入方案逐渐成为一种新兴的研究方向, 尤其适用于动力学孔径较小的储存环。该方案的特点是磁场在注入束流位置有较大值在中心轨道处接近零，显著降低了脉冲磁场对储存束流的扰动。设计了一种基于八导线布局的非线性冲击磁铁，重点研究了一些关键参数对磁场性能的影响，包括导线布局、磁铁端部边缘场、陶瓷真空镀膜等，并相应地综合优化了这些关键参数。结果表明所设计的非线性冲击磁铁能够满足在研的高亮度正负电子对撞环和高亮度同步辐射环的注入系统要求。
- 离轴注入 /
- 非线性冲击磁铁 /
- 镀膜 /
- 束流耦合阻抗 /
- 涡流效应
Abstract: In recent years, off-axis injection schemes based on nonlinear kicker magnets have emerged as a new research focus, particularly suitable for storage rings with small dynamic apertures. This scheme is characterized by a strong magnetic field generated by the nonlinear kicker magnet at the injection point to deflect the injected beam, while maintaining a near-zero magnetic field near the central orbit, significantly reducing interference with the stored beam. This paper presents the design of a nonlinear kicker magnet with an eight-conductor layout, conducting an in-depth study on the impact of key parameters—such as conductor layout, edge fields at the magnet ends, and ceramic vacuum coatings—on magnetic field performance, followed by optimization of these parameters. Results indicate that this nonlinear kicker magnet design meets the injection system requirements for the high-brightness electron-positron collider and synchrotron radiation ring under development.
- off-axis injection /
- nonlinear kicker magnet /
- coating /
- beam coupling impedance /
- vortex effect

HTML全文

图 1 利用非线性冲击磁铁进行离轴注入过程的相空间示意图

Figure 1. Phase space schematic diagram of off-axis injection process using pulsed nonlinear magnet

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图 2 导线简化平面图

Figure 2. Conductor’s simplified floor plan

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图 3 理论曲线、OPERA-2D、OPERA-3D仿真磁场对比分析图

Figure 3. Magnetic field comparative analysis of theoretical curves,OPERA-2D and OPERA-3D simulation curves

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图 4 非线性冲击磁铁完整结构示意图

Figure 4. Schematic diagram of complete structure and interal connection of pulsed nonlinear magnet

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图 5 磁场B_y沿纵向分布

Figure 5. Magnetic field B_y is distributed longitudinally

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图 6 非线性冲击磁铁完整模型磁场B_y的三维分布

Figure 6. Three-dimensional distribution of the magnetic field B_y in the complete model of a pulsed nonlinear magnet

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图 7 积分场分布

Figure 7. Distribution of integral field

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图 8 不同厚度模型注入点磁场时域图

Figure 8. Time-domain plot of magnetic field at injection point in different thickness models

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图 9 不同镀膜厚度下注入点磁场时域图

Figure 9. Time domain diagram of the magnetic field of the injection point under different coating thicknesses

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图 10 不同Ti镀膜厚度中心无场区分布图

Figure 10. Distribution of fieldless area in the center of different Ti coating thicknesses

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图 11 1 μm Ti 镀膜的脉冲非线性磁铁热功率时域图像

Figure 11. Time-domain image of the thermal power of a coated pulsed nonlinear magnet with 1 μm Ti coating

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图 12 完整镀膜模型与条形镀层模型在注入点的磁场强度时域图像

Figure 12. Time-domain images of the magnetic field strength of the full coating model and the strip coating model at the injection point

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图 13 不同尾场长度下的结果

Figure 13. Simulation results at different wake lengths

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图 14 非线性冲击磁铁的束流耦合阻抗对比分析

Figure 14. Comparison of beam coupling impedances of pulsed nonlinear magnet

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图 15 非线性冲击磁铁热损耗

Figure 15. Heat loss of pulsed nonlinear magnet

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表 1 脉冲非线性磁铁设计参数

Table 1. Pulsed nonlinear magnet design parameters

vertical gap/mm	length/ mm	material	wire diameter/mm	inner traverse center coordinates/mm	outer traverse center coordinates/mm	magnetic inductance/μH	max. peak current/A	max. charging voltage/kV
10	500	oxygen-free copper	2	(7，8)±0.04	(9.5，13)±0.04	1.1	5355	20.2

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表 2 不同Ti镀膜厚度在注入点x₀=−5 mm的参数

Table 2. Parameters with different Ti coating thicknesses at the injection point x₀=−5 mm

coating thickness/μm	peak moment/μs	peak magnetic field/T	peak integration field/(T·m)
0	0.5	0.0296	0.0148
1	0.54	0.0291	0.0145
5	0.63	0.0268	0.0134
10	0.72	0.0251	0.0126
50	1.13	0.0159	0.0080

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表 3 不同间隙下非线性冲击磁铁注入点磁场强度、中心区平坦度

Table 3. Magnetic field strength and flatness of the central region at the injection point under different gaps

gap spacing/mm	peak moment/μs	peak magnetic field/T	maximum magnetic field/mT
1	0.53	0.0293	0.0056
2	0.53	0.0290	0.2120
3	0.52	0.0294	0.1470
4	0.51	0.0292	0.0093

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