120 keV正离子源加速器绝缘支撑系统设计

邓文; 谢亚红; 顾玉明; 江云飞; 刘龙斌; 王昉; 胡纯栋

doi:10.11884/HPLPB202537.240279

120 keV正离子源加速器绝缘支撑系统设计

doi: 10.11884/HPLPB202537.240279

邓文^{1, 2,},
谢亚红^{1, 2, ,},
顾玉明²,
江云飞^{2, 4},
刘龙斌^{2, 3},
王昉^{1, 2},
胡纯栋^{1, 2}

1.
中国科学技术大学研究生院科学岛分院，合肥 230026
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.
东华理工大学核科学与工程学院，南昌 330013
4.
安徽大学物质科学与信息技术研究院，合肥 230601

基金项目: 国家自然科学基金项目(11975261)

详细信息

作者简介:
邓　文，wdeng@mail.ustc.edu.cn

通讯作者:
谢亚红，xieyh@ipp.ac.cn。

中图分类号: TL62⁺9.1
计量
- 文章访问数: 111
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- PDF下载量: 12
- 被引次数: 0
出版历程
- 收稿日期: 2024-08-26
- 修回日期: 2025-01-07
- 录用日期: 2025-01-26
- 网络出版日期: 2025-04-11
- 刊出日期: 2025-04-15

Design of insulation support system for 120 keV positive ion source accelerator

Deng Wen^{1, 2
,},
Xie Yahong^{1, 2
, ,},
Gu Yuming²,
Jiang Yunfei^{2, 4},
Liu Longbin^{2, 3},
Wang Fang^{1, 2},
Hu Chundong^{1, 2}

1.
Scinece Island Branch, Graduate School, University of Science and Technology of China, Hefei 230026, China
2.
Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
3.
School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China
4.
Institutes of Physical Science and Infomation Technology, Anhui University, Hefei 230601, China

摘要

摘要: 针对120 keV正离子源，设计了加速器的绝缘支撑系统，确定了绝缘体与支撑法兰的连接方式及相关参数，并通过有限元分析的方法，针对电场集中和连接支撑的问题，开展了绝缘支撑系统的优化设计。分别对绝缘体和电极进行静电模拟，确定了绝缘体的材料及结构参数，研究了加速器的绝缘性能。研究表明各绝缘体周围最大电场值低于4 kV/mm，电极间最大电场值约为14 kV/mm，满足120 keV正离子源加速器耐压要求。其次考虑离子源的垂直安装，在离子源重力作用下EG支撑法兰和绝缘体的连接螺栓要承受很大的正应力和剪应力，开展了加速器的机械性能研究。经过力学分析，螺栓最大正应力为26.336 MPa，剪切力为1.292 MPa。经过模拟分析，螺栓最大正应力为25.867 MPa，与理论解相差1.78%，小于材料的抗拉强度；最大剪切力为1.295 MPa，与理论解相差0.23%，小于材料的抗剪强度。研究结果表明120 keV正离子源加速器机械性能满足设计要求。
- 正离子源 /
- 加速器 /
- 绝缘支撑系统 /
- 有限元分析 /
- 绝缘性能 /
- 机械性能
Abstract: For the 120 keV positive ion source, the insulation support system for the accelerator was designed, and the connection mode and basic parameters of the insulators and support flanges were determined. The optimization design of the insulation support system was studied through the finite element analysis method for the problems of electric field concentration and connection support. The electrostatic simulations of insulators and grid plates were carried out to determine the material and structural parameters of insulators, so as to study the insulating properties of the accelerator. The study shows that the maximum electric field around each insulator is less than 4 kV/mm, and the maximum electric field between grids is about 14 kV/mm, which can meet the voltage withstand requirements of 120 keV positive ion source accelerator. Secondly, considering the vertical installation of ion source, the connecting bolts of EG support flange and insulator would bear great normal stress and shear stress under the action of ion source gravity, thus the mechanical properties of the accelerator were studied. After mechanical analysis, the maximum normal stress of the bolt is 26.336 MPa, and the shear force is 1.292 MPa. The maximum normal stress of the bolt in the finite element analysis is 25.867 MPa, which is 1.78% different from the theoretical solution and less than the tensile strength of the material. The maximum shear force is 1.295 MPa, which is 0.23% different from the theoretical solution and less than the shear strength of the material. The results show that the mechanical properties of the 120 keV positive ion source accelerator meet the design requirements.
- positive ion source /
- accelerator /
- insulation support system /
- finite element analysis /
- insulating property /
- mechanical property

HTML全文

图 1 120 keV正离子源加速器剖面图

Figure 1. Schematic diagram of 120 keV positive ion source accelerator

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图 2 SG-EG法兰绝缘体

Figure 2. The SG-EG insulator

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图 3 PG-SG绝缘体电场分布图

Figure 3. Distribution diagram of electric fields around PG-SG insulator

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图 4 绝缘体表面最大电场随绝缘体高度变化折线图

Figure 4. Plot of surface maximum electric fields as a function of the height of the insulator

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图 5 PG-SG电极间电场分布图

Figure 5. Electric field distribution between PG-SG

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图 6 三层电极倒角设计值

Figure 6. Chamfer design values for three grids

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图 7 中性束注入系统中离子源受力图

Figure 7. Force diagram of the ion source in the neutral beam injection system

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图 8 EG支撑法兰和绝缘体之间螺栓间距图

Figure 8. Bolt spacing between EG support flange and insulator

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图 9 有限元模型

Figure 9. Finite element model

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图 10 整体结构变形云图

Figure 10. Cloud chart of overall structure deformation

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图 11 螺栓应力云图

Figure 11. Cloud chart of bolt stress

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表 1 1、3、5号位倒角与电场关系表

Table 1. Relationship between chamfers and electric fields at positions 1, 3 and 5

chamfer/mm	position 1/(kV·mm⁻¹)	position 3/(kV·mm⁻¹)	chamfer/mm	position 5/(kV·mm⁻¹)
0.4	16.9	14.5	2	16.0
0.6	15.5	13.3	3	14.0
0.7	14.3	12.7	4	12.8
0.8	16.4	12.4	5	12.0

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表 2 材料属性表

Table 2. Material properties

material	density/(kg·m⁻³)	tensile strength/MPa	shear strength/MPa
304 stainless steel	7930	520	460
PEEK	1320	98	53

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表 3 螺栓轴向力及剪切力汇总表

Table 3. Summary of axial and shear forces on bolts

bolt number	axial force/N	shear force/N	bolt number	axial force/N	shear force/N
1	−11.214	99.963	19	130.860	97.976
2	−8.466	98.365	20	128.760	95.891
3	−6.444	96.682	21	126.070	94.146
4	−6.560	96.656	22	126.280	94.158
5	−8.453	98.324	23	128.980	95.915
6	−11.173	99.948	24	130.930	97.998
7	−7.288	101.47	25	106.110	100.29
8	−4.003	101.62	26	74.424	100.65
9	−1.080	101.69	27	48.888	100.91
10	0.690	101.69	28	30.771	101.17
11	3.316	101.69	29	18.179	101.39
12	6.334	101.49	30	10.716	101.42
13	10.686	101.40	31	6.257	101.49
14	18.150	101.39	32	3.363	101.69
15	30.780	101.16	33	0.675	101.69
16	48.889	100.92	34	−1.105	101.69
17	74.411	100.65	35	−4.019	101.62
18	105.870	100.25	36	−7.346	101.47

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