用于加速器中子源的斩束器研究与设计

潘文龙; 李海鹏; 王盛; 苏浩泉; 朱颉

doi:10.11884/HPLPB202638.250164

用于加速器中子源的斩束器研究与设计

doi: 10.11884/HPLPB202638.250164

潘文龙^{1, 2,},
李海鹏^{1, 2, ,},
王盛^{1, 2, 3},
苏浩泉^{1, 2},
朱颉^{1, 2}

1.
西安交通大学核科学与技术学院，西安 710049
2.
西安交通大学湖州中子科学实验室，浙江湖州 313000
3.
华硼中子科技（杭州）有限公司，杭州 310000

基金项目: 国家自然科学基金项目(12105214)

详细信息

作者简介:
潘文龙，672026483@qq.com

通讯作者:
李海鹏，lihaipeng@xjtu.edu.cn。

中图分类号: TL503.3
计量
- 文章访问数: 30
- HTML全文浏览量: 20
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2025-06-07
- 修回日期: 2025-12-28
- 录用日期: 2025-12-16
- 网络出版日期: 2026-01-15

Research and design of chopper for accelerator neutron source

Pan Wenlong^{1, 2
,},
Li Haipeng^{1, 2
, ,},
Wang Sheng^{1, 2, 3},
Su Haoquan^{1, 2},
Zhu Jie^{1, 2}

1.
School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
2.
Huzhou Neutron Science Laboratory, Xi’an Jiaotong University, Huzhou, Zhejiang 313000, China
3.
Hua Boron Neutron Technology(Hangzhou) Co., Ltd., Hangzhou 310000, China)

摘要

摘要: 针对应用于硼中子俘获治疗的加速器中子源的束流偏转问题，本文为其低能束流传输线部分设计了一套斩束器，通过理论计算与软件模拟，验证方案的可行性。为了解决斩波器电场强度不均匀问题，引入圆弧电极设计结构，微波工作室（CST studio suite）模拟仿真表明其具有更好的电场分布均匀性。发展了基于Python程序的CST与Tracewin联合束流动力学模拟，结果表明设计的斩波器能够高效率地实现束流偏转功能，设计方案具有良好的实际应用价值和意义。
- 加速器中子源 /
- 硼中子俘获治疗 /
- 斩束器 /
- 束流动力学 /
- 静电场计算
Abstract: Background
Cancer is a major global health issue. With the development of accelerator physics, boron neutron capture therapy based on accelerator neutron sources has received widespread attention. In the accelerator system, the low energy beam transport is responsible for connecting the ion source and accelerator, as well as processing the beam. For the problem of beam deflection, the chopper is required, so a high-performance chopper is crucial for the entire system.
Purpose
This study aims to improve the electric field uniformity of the chopper by using circular arc plates instead of parallel plates, and to simulate the chopper design through Python program coupling using CST studio suite and Tracewin software.
Methods
The beam deflection formula of the chopper was theoretically derived, and the electrostatic and beam dynamics design was completed through CST studio suite and Tracewin software. The advantages and feasibility of the circular arc plate were verified through coupling simulation of the two software.
Results
Theoretical calculations and simulations have shown that the electric field distribution of circular arc plates is more uniform, and the beam deflection function is efficiently completed, confirming the feasibility of the design scheme.
Conclusions
By coupling CST studio suite with Tracewin software for simulation, a more realistic simulation of beam dynamics can be achieved, which solves the problem of Tracewin software being unable to set the electric field strength of circular arc plates. The joint simulation method of CST studio suite and Tracewin has been developed, which has certain value for research on chopper design.
- accelerator-based neutron source /
- boron neutron capture therapy /
- chopper /
- beam dynamic /
- electrostatic field calculation

HTML全文

图 1 静电式斩束器结构示意

Figure 1. Schematic diagram of electrostatic chopper structure

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图 2 斩束器电场强度矢量图

Figure 2. Vector diagram of electric field strength of chopper

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图 3 斩束器横向电场强度分布曲线图

Figure 3. Transverse electric field intensity distribution curve of chopper

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图 4 横向电场变化与曲率半径关系图

Figure 4. Relationship diagram between transverse electric field variation and curvature radius

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图 5 圆弧极板斩束器横向电场强度分布曲线图

Figure 5. Horizontal electric field intensity distribution curve of circular arc plate chopper

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图 6 圆弧极板斩束器电场强度矢量图

Figure 6. Vector diagram of electric field strength for arc plate chopper

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图 7 斩束器作用下束流包络图

Figure 7. Beam envelope diagram under the action of chopper

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图 8 斩束器作用下束流偏转相图

Figure 8. Phase diagram of beam deflection under the action of chopper

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图 9 圆弧极板斩束器作用下束流包络图

Figure 9. Beam envelope diagram under the action of arc plate chopper

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图 10 平行极板斩束器作用下束流偏转相图

Figure 10. Phase diagram of beam deflection under the action of parallel plate chopper

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图 11 圆弧极板斩束器作用下束流偏转相图

Figure 11. Phase diagram of beam deflection under the action of arc plate chopper

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图 12 斩束器电压波形图

Figure 12. Voltage waveform diagram of the beam chopper

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表 1 束流参数

Table 1. Parameters of beam current

E/keV I/mA duty/% ε/(π·mm·mrad) α β/(mm·π⁻¹·mrad⁻¹)

35 30 100 0.20 −2.0 0.15

下载: 导出CSV

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