中国散裂中子源旋转线圈测量系统研制

周建新; 康文; 李帅; 尹宝贵; 吴煜文; 刘艺琴; 吴锡; 李藜; 邓昌东

doi:10.11884/HPLPB201830.180186

中国散裂中子源旋转线圈测量系统研制

doi: 10.11884/HPLPB201830.180186

周建新^{1, 2, 3,},
康文^{1, 2, 3},
李帅^{1, 2, 3},
尹宝贵^{1, 2},
吴煜文^{1, 2, 3},
刘艺琴^{1, 2, 3},
吴锡^{1, 2, 3},
李藜^{1, 2, 3},
邓昌东^{1, 2, 3}

1.
中国科学院高能物理研究所, 北京 100049
2.
东莞中子科学中心, 广东东莞 523803
3.
东莞高精度磁场测量重点实验室, 广东东莞 523803

基金项目:

国家自然科学基金项目 11775241

详细信息

作者简介:
周建新(1983—)，男，博士，副研究员，从事粒子加速器磁铁技术研究；zhoujx@ihep.ac.cn

中图分类号: TL503.8
计量
- 文章访问数: 1029
- HTML全文浏览量: 264
- PDF下载量: 131
- 被引次数: 0
出版历程
- 收稿日期: 2018-07-05
- 修回日期: 2018-08-27
- 刊出日期: 2018-10-15

Development of rotating coil measurement system for China Spallation Neutron Source

Zhou Jianxin^{1, 2, 3
,},
Kang Wen^{1, 2, 3},
Li Shuai^{1, 2, 3},
Yin Baogui^{1, 2},
Wu Yuwen^{1, 2, 3},
Liu Yiqin^{1, 2, 3},
Wu Xi^{1, 2, 3},
Li Li^{1, 2, 3},
Deng Changdong^{1, 2, 3}

1.
Institute of High Energy Physics, Chinese Academy Sciences, Beijing 100049, China
2.
Dongguan Neutron Science Center, Dongguan 523803, China
3.
Dongguan Key Laboratory of High Precision Magnetic Field Measurement, Dongguan 523803, China

摘要

摘要: 中国散裂中子源(CSNS)加速器主要由一台直线加速器、一台快循环加速器以及低能、高能输运线组成。针对CSNS加速器部分直流磁铁研制了一套旋转线圈测量系统。对系统的研制方案、功能、精度、完成的磁铁类型以及部分测量结果进行介绍。该系统解决了CSNS批量磁铁之间的不同中心高度、质量、有效长度、磁场强度的兼容性难题。经过测试运行，积分场测量重复性误差好于±0.02%，空间谐波重复性误差好于0.005%，磁中心测量重复性误差好于±0.03 mm，顺利完成了中国散裂中子源工程150台多种类型磁铁的检测任务。
- 旋转线圈 /
- 磁场测量 /
- 校正磁铁 /
- 四极磁铁 /
- 六极磁铁
Abstract: The China Spallation Neutron Source (CSNS) accelerator mainly consists of a linear accelerator, a 1.6 GeV rapid cycling synchrotron (RCS), a low energy transport line and a high energy transport line. A rotating coil measurement system was developed for the DC magnets of the CSNS accelerator. This system solves the compatibility problems of different center heights, masses, effective lengths, and magnetic field strengths among CSNS bulk magnets. After testing, the repeatability error of the integral field measurement is less than ±0.02%, the repeatability error of harmonics is less than 0.005%, the repeatability error of the magnetic center measurement is less than ±0.03mm. It has successfully completed the task of detecting 150 magnets of the China Spallation Neutron Source. In this paper, the development plan, function, accuracy, types of measured magnets and some measurement results are introduced.
- rotating coil /
- magnetic field measurement /
- corrector magnet /
- quadrupole magnet /
- sextupole magnet

HTML全文

图 1 垂直四极磁场图像及径向线圈截面示意图

Figure 1. Image of vertical quadrupole magnetic field and cross section of a radial coil

下载: 全尺寸图片幻灯片

图 2 CSNS旋转线圈测量系统

Figure 2. CSNS rotating coil measuring system

下载: 全尺寸图片幻灯片

图 3 径向线圈机械结构

Figure 3. Mechanical structure of radial coil

下载: 全尺寸图片幻灯片

图 4 磁铁极头支撑的安装方式

Figure 4. Magnet pole support installation

下载: 全尺寸图片幻灯片

图 5 研制完成的磁铁支撑调节平台

Figure 5. Developed magnet support adjustment platform

下载: 全尺寸图片幻灯片

图 6 旋转线圈测量系统简易框图

Figure 6. Simple diagram of the measurement system

下载: 全尺寸图片幻灯片

图 7 谐波测量重复性

Figure 7. Measurement repeatability of harmonics

下载: 全尺寸图片幻灯片

图 8 磁中心偏置测量精度检验

Figure 8. Measurement accuracy test of magnetic center offset

下载: 全尺寸图片幻灯片

图 9 部分类型磁铁正在被测量

Figure 9. Some types of magnets are being measured

下载: 全尺寸图片幻灯片

表 1 CSNS部分直流多极磁铁参数

Table 1. Parameters of partial DC multipole magnet for CSNS

magnet type	quantity	gradient	aperture/mm	good field region/mm	effective length/mm	field error/%	total weight/kg
LR-80Q	37	4.7 T·m^-1	80	70	200	±0.1	300
LR-120Q	10	4.7 T·m^-1	120	110	200	±0.1	450
RCS-230S	16	40.0 T·m^-2	230	218	200	±0.5	859
RT-180QA	19	7.0 T·m^-1	180	160	500	±0.1	1900
RT-180QB	2	6.1 T·m^-1	180	160	500	±0.1	1700

下载: 导出CSV

表 2 CSNS部分校正磁铁参数

Table 2. Parameters of corrector magnet for CSNS

magnet type	quantity	central magnetic field B₀/T	effective length/m	integral field/(T·m)	aperture(W×H)	width of good field/mm	field uniformity/%	total weight/kg
LR-80CH	8	0.01	0.2	0.002	80 mm×80 mm	70	±0.1	35
RCS-300CH	17	—	—	0.008	300 mm×300 mm	192	±0.1	186
RT-180CV	5	0.04	0.2	0.008	180 mm×180 mm	153	±0.1	144
RT-206CV	4	0.04	0.2	0.008	206 mm×206 mm	175	±0.1	168

下载: 导出CSV

表 3 r_0/r₁不同比值导致的误差因子

Table 3. Error factor caused by different ratios of r₀/r₁

n	(r₀/r₁)^n－2
n	r₀/r₁=0.8	r₀/r₁=0.9	r₀/r₁=1	r₀/r₁=1.2	r₀/r₁=1.5
3	0.80	0.90	1	1.20	1.50
4	0.64	0.81	1	1.44	2.25
5	0.51	0.73	1	1.73	3.38
6	0.41	0.66	1	2.07	5.06
7	0.33	0.59	1	2.49	7.59
8	0.26	0.53	1	2.99	11.39
9	0.21	0.48	1	3.58	17.09
10	0.17	0.43	1	4.30	25.63
11	0.13	0.39	1	5.16	38.44
12	0.11	0.35	1	6.19	57.67
13	0.09	0.31	1	7.43	86.50
14	0.07	0.28	1	8.92	129.75

下载: 导出CSV

表 4 径向线圈设计参数

Table 4. Design parameters of radial coil

coil number	magnet type	r₁/mm	r₂/mm	r₃/mm	r₄/mm	outer coil/turns	inner coil/turns	skeleton length/mm
A	LR-80Q, LR-120Q, LR-80CH/V	36	25.5	27	16.5	280	420	750
B	RT-180QA/B, RT-180CH/V, RT-206CH/V	76.5	54.18	57.38	35.06	120	180	1300
C	RCS-230S, RCS-300CH/V	102	79.59	81.6	66.8	160	320	1300

下载: 导出CSV

表 5 梯度积分场和磁中心偏置

Table 5. Gradient integral field and magnetic center offset

content	gradient integral field GL/T	D_x/mm	D_y/mm	D_r/mm
2014.09.22PM	1.059 51	0.09	-0.02	0.09
2014.09.23AM	1.059 45	0.07	-0.02	0.07

下载: 导出CSV

参考文献(10)

[1]	Wang Sheng, Fang Shouxian, Fu Shinian, et al. Introduction to the overall physics design of CSNS accelerators[J]. Chinese Physics C, 2009, 33(s2): 1-3.
[2]	Wei Jie, Fu Shinian, Tang Jingyu, et al. China Spallation Neutron Source-An overview of application prospects[J]. Chinese Physics C, 2009, 33(11): 1033-1042.
[3]	赵籍九, 尹兆升. 粒子加速器技术[M]. 北京: 高等教育出版社, 2006. Zhao Jijiu, Yin Zhaosheng. Particle accelerator technology. Beijing: Higher Education Press, 2006
[4]	Jain A K. Measurement and alignment of accelerator and detector magnets[R]. CERN-98-05.
[5]	Tanabe J. Iron dominated electromagnets design, fabrication, assembly and measurements[R]. SLAC-R-754, 2005.
[6]	Zhou Jianxin, Li Li, Yin Baogui, et al, A harmonic coil measurement system based on a dynamic signal acquisition device[J]. Nuclear Instruments and Methods in Physics Research A, 2010, 624: 549-553. doi: 10.1016/j.nima.2010.10.009
[7]	周建新, 李藜, 康文, 等. 旋转线圈测量系统信号采集设备的研制[J]. 原子能科学技术, 2013, 47(5): 893-896. https://www.cnki.com.cn/Article/CJFDTOTAL-YZJS201305037.htm Zhou Jianxin, Li Li, Kang Wen, et al. Development of signal acquisition device of rotating coil measurement system. Atomic Energy Science and Technology, 2013, 47(5): 893-896 https://www.cnki.com.cn/Article/CJFDTOTAL-YZJS201305037.htm
[8]	Zhou Jianxin, Li Li, Yin Baogui, et al, AC magnetic field measurement of CSNS/RCS quadrupole prototype[J]. Nuclear Instruments and Methods in Physics Research A, 2011, 654: 72-75. https://www.sciencedirect.com/science/article/pii/S0168900211014124
[9]	Zhou Jianxin, Kang Wen, Yin Baogui, et al. The development of magnetic field measurement system for drift-tube linac quadrupole[J]. Nuclear Instruments and Methods in Physics Research A, 2015, 786: 142-146. doi: 10.1016/j.nima.2015.03.050
[10]	Zhou Jianxin, Kang Wen, Li Shuai, et al. AC magnetic field measurement using a small flip coil system for rapid cycling AC magnets at the China Spallation Neutron Source (CSNS)[J]. Nuclear Instruments and Methods in Physics Research A, 2018, 880: 80-86. https://www.sciencedirect.com/science/article/pii/S0168900217311166