合肥先进光源光束线站辐射源项分析与屏蔽设计验证

陈家铎; 蒋诗平; 赵扬; 杨鹏辉; 王琳

doi:10.11884/HPLPB202537.250207

合肥先进光源光束线站辐射源项分析与屏蔽设计验证

doi: 10.11884/HPLPB202537.250207

陈家铎^1,,
蒋诗平^{1, 2, ,},
赵扬¹,
杨鹏辉¹,
王琳^{1, 2}

1.
国家同步辐射实验室，合肥 230029
2.
中国科学技术大学核科学技术学院，合肥 230027

基金项目: 国家自然科学基金项目(12405173)

详细信息

作者简介:
陈家铎，cjd0013@mail.ustc.edu.cn

通讯作者:
蒋诗平，spjiang@ustc.edu.cn。

中图分类号: TL72
计量
- 文章访问数: 99
- HTML全文浏览量: 28
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2025-07-13
- 修回日期: 2025-09-15
- 录用日期: 2025-09-15
- 网络出版日期: 2025-09-19
- 刊出日期: 2025-10-15

Radiation source term analysis and shielding verification for beamline stations at the Hefei advanced light facility

Chen Jiaduo^1
,,
Jiang Shiping^{1, 2
, ,},
Zhao Yang¹,
Yang Penghui¹,
Wang Lin^{1, 2}

1.
National Synchrotron Radiation Laboratory, Hefei 230029, China
2.
School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230027, China

摘要

摘要: 合肥先进光源作为国际领先的第四代同步辐射光源之一，在束流亮度和相干性方面实现了显著提升，同时也对辐射防护提出了更高要求。传统的辐射屏蔽设计方法主要基于前三代光源的辐射特性，难以满足新一代光源的辐射防护需求，尤其对Touschek效应诱发的固体轫致辐射评估存在明显不足。针对现有研究的局限性，以合肥先进光源的BL10光束线站作为研究对象，针对其复杂的光路结构和频繁切换的运行模式，构建了一个多物理场耦合的模拟分析框架。该框架通过ELEGANT模拟Touschek效应引起的束流损失，利用FLUKA评估辐射传输和能量沉积过程，并借助STAC8计算同步辐射剂量分布，系统分析了各类辐射源的贡献。研究结果表明，Touschek效应对四代光源光束线站的辐射贡献不可忽视，且不同线站间存在显著差异，应在辐射屏蔽设计中予以充分考虑。提出的方法已应用于合肥先进光源光束线站的辐射屏蔽设计与验证，也为新一代光源的辐射防护研究提供了重要参考。
- 合肥先进光源 /
- 光束线站 /
- FLUKA /
- 托歇克效应 /
- 轫致辐射
Abstract: Background
The Hefei Advanced Light Facility (HALF), as one of the world’s most advanced fourth-generation synchrotron radiation sources, has achieved remarkable improvements in beam brightness and coherence. However, these advances impose stricter requirements on radiation protection, and traditional shielding methods developed for third-generation facilities are insufficient, particularly in accounting for solid bremsstrahlung induced by the Touschek effect.
Purpose
This study aims to establish a comprehensive framework for evaluating radiation sources at HALF beamline stations and to provide a reliable basis for shielding design.
Methods
Taking the BL10 beamline station as the case study, a multi-physics coupled simulation approach was developed: ELEGANT was used to model Touschek-induced beam losses, FLUKA was employed to simulate bremsstrahlung transport and energy deposition, and STAC8 was applied to calculate synchrotron radiation dose distributions.
Results
The results indicate that the Touschek effect contributes significantly to overall radiation levels in fourth-generation light sources and cannot be neglected in shielding assessments. Moreover, the integrated framework enables systematic analysis of multiple radiation sources under complex geometry and operational transitions.
Conclusions
The proposed method has been successfully applied to the radiation assessment and shielding design verification of HALF beamline stations, and it also provides a valuable reference for radiation protection studies in new-generation synchrotron facilities.
- HALF /
- beamline station /
- FLUKA /
- Touschek effect /
- bremsstrahlung

HTML全文

图 1 光束线站辐射屏蔽设计流程图

Figure 1. Radiation shielding design workflow for the beamline station

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图 2 储存环的几何结构

Figure 2. Layout of storage ring

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图 3 光束线站布局图

Figure 3. Layout of the beamline station

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图 4 直线节内损失电子的位置、方向和能量分布

Figure 4. Position, direction and energy distributions of the lost electrons in the straight sections

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图 5 棚屋的几何建模

Figure 5. Geometry model of the hutches

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图 6 进入FOE的轫致辐射粒子的能谱分布、空间分布及角度分布

Figure 6. Energy spectrum, spatial distribution and angular distributions of bremsstrahlung particles entering the FOE

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图 7 三种模式的轫致辐射剂量率分布图

Figure 7. Bremsstrahlung dose rate distributions under different modes

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图 8 短直线节中损失电子的位置、方向和能量分布

Figure 8. Position, direction and energy distributions of the lost electrons in the short straight sections

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表 1 插入件参数

Table 1. Insertion device parameters

vacuum pressure limit/Pa	length/m	gap/mm	number of magnetic periods	magnetic field strength/T	magnetic period length/cm
2×10⁻⁷	4.2	6	108	0.99	3.82

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表 2 残余气体成分

Table 2. Composition of residual gas

residual gas	atomic number	mass fraction/%
H₂	2	67
H₂O	10	3
CO	14	22
CO₂	22	8

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表 3 准直器与安全光闸设计

Table 3. Collimator and safety shutter design

	distance to the source/m	material	aperture/mm
collimator	23.83	lead	15×15
collimator	33.15	lead	15×15
safety shutter	36.85	W-Fe-Ni alloy	−
collimator	37.15	W-Fe-Ni alloy	15×15
collimator	43.4	lead	15×15
collimator	46.7	lead	15×15

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表 4 各棚屋推荐的铅屏蔽厚度及其外部最大剂量率

Table 4. Lead shielding recommendations and external dose rates for hutches

shielding	thickness/mm	dose rate/(μSv·h⁻¹)
shielding	thickness/mm	total	solid bremsstrahlung	gas bremsstrahlung	synchrotron
north wall of FOE	4	0.241	0.161	0.054	0
south wall of FOE	2	0.285	0.210	0.075	0
roof of FOE	0	0.283	0.193	0.071	0.019
downstream end wall of FOE	40	0.140	0.104	0.036	0
north wall of EH	0	0.126	0.059	0.035	0.032
south wall of EH	4	0.105	0.061	0.044	0
roof of EH	0	0.084	0.031	0.037	0.016
downstream end wall of EH	45	0.067	0.037	0.030	0

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